Notebookcheck

Lenovo Flex 2 Pro 15 Notebook Review

Sascha Mölck, Tanja Hinum (translated by Liala Stieglitz), 10/11/2015

Flexible all-rounder. Lenovo's multi-mode, 15.6-inch Flex 2 Pro 15 does not exhibit any severe shortcomings and presents itself as a well-rounded, versatile device. However, its decent configuration (SSD, 16 GB RAM) forces up the price to almost 1000 Euros (~$1135).

For the original German review, see here.

Lenovo's Flex 2 Pro 15 is a 15.6-inch laptop with a display that can be folded by approximately 300 degrees. Consequently, the laptop - like all models in the Flex line - offers diverse modes of operation. When disregarding the screen's wide opening angle, the user faces a well-equipped 15.6-inch all-rounder. Discover whether the device is compelling in our report.

The Flex 2 Pro is a member of the Convertible/2-in-1 category. There is not exactly an oversupply of direct contenders. Two apt models found in our database are HP's Envy 15-w000ng x360 and Asus' Transformer Book Flip TP500LN. However, "conventional" laptops, such as Acer's Aspire VN7-571G or HP's Pavilion 15-ab022ng, also belong to the rivals of Lenovo's computer.

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Lenovo Flex 2 Pro-15
Graphics adapter
NVIDIA GeForce 840M - 4096 MB, Core: 1029-1124 MHz, Memory: 900 MHz, DDR3, 64 bit interface, ForceWare 355.98 (10.18.13.5598), Optimus
Memory
16384 MB 
, DDR3-1600, dual-channel, two memory banks (both filled)
Display
15.6 inch 16:9, 1920 x 1080 pixel, capazitive, 10 touch points, LG LP156WF4-SPL1, IPS, glossy: yes
Mainboard
Intel Lynx Point-LP
Storage
Samsung SSD PM851 256 GB MZ7TE256HMHP, 256 GB 
, , 170 GB free
Soundcard
Realtek ALC233 @ Intel Lynx Point-LP PCH
Connections
2 USB 2.0, 1 USB 3.0 / 3.1 Gen1, 1 HDMI, 1 Kensington Lock, Audio Connections: Audio combo, Card Reader: SD, Sensors: brightness sensor
Networking
Realtek RTL8168/8111 Gigabit-LAN (10/100/1000/2500/5000MBit/s), Intel Dual Band Wireless-AC 3160 (a/b/g/n = Wi-Fi 4/ac = Wi-Fi 5), Bluetooth 4.0
Size
height x width x depth (in mm): 19.9 x 382 x 276 ( = 0.78 x 15.04 x 10.87 in)
Battery
44 Wh Lithium-Ion, 7.3 V, 6200 mAh
Operating System
Microsoft Windows 8.1 64 Bit
Camera
Webcam: HD webcam
Additional features
Speakers: stereo, Keyboard: chiclet, Keyboard Light: yes, Lenovo Photo Master, Cyberlink PowerDirector 10, McAfee LiveSafe-Internet Security (trial), MS Office (trial), Nitro Pro 9, 24 Months Warranty
Weight
2.3 kg ( = 81.13 oz / 5.07 pounds), Power Supply: 355 g ( = 12.52 oz / 0.78 pounds)
Price
999 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Case

The casing of the Flex 2 Pro is largely made of an aluminum alloy. The display bezel is an exception. All components of the casing are black. The base unit's upper side additionally features a brushed finish. All surfaces are basically quite susceptible to fingerprints. Compared with our previously tested Lenovo Flex 2 15, the Pro model is overall slimmer. It also lacks the optical drive found in the Flex 2 15. A highlight of the Flex models is the so-called Stand Mode, which allows opening the lid to such a degree that the base unit's upper side acts as the device's stand. This position facilitates using the touchscreen. The Flex 2 Pro does not have a maintenance hatch, and the battery cannot be removed without some effort, either.

The casing can be dented slightly on the keyboard's left and below the touchpad although it is made of aluminum. Pressure applied to the surface below the touchpad's area also causes the upper and lower tray to move against each other marginally. That should not happen in a 1000-Euro (~$1135) device. The base unit's stiffness is still within a normal parameter, and this is also true for the laptop's lid. Neither twisting the lid nor pressing the back leads to image distortions. The hinges keep the lid firmly in position but wobble for a moment. Opening the lid is possible with some finger-hand-arm acrobatics.

 

Connectivity

The laptop does not exhibit anything conspicuous in terms of connectivity. The common interface configuration is present. Of the three USB ports, only one supports the USB 3.0 standard - we would not have minded two USB 3.0 ports at all. Only one video-out (HDMI) is installed. Lenovo axed the VGA out. We like the interface positioning; cables will not clutter the areas beside the wrist rest.

Communication

Lenovo installs Intel's 3160-AC Wi-Fi module in the Flex 2 Pro. It supports the Wi-Fi 802.1 a/b/g/n/ac standards. The connection was always stable in a radius of 15 meters around our router. We did not observe speed losses. Intel's module also adds Bluetooth 4.0 to the computer. The Gigabit Ethernet chip comes from Realtek in form of the long-known, established model from the RTL8168/8111 family.

Memory Card Reader

We used our reference SD card (Toshiba Exceria Pro SDXC 64 GB UHS-II) to assess the memory card reader. The maximum transfer rate for copying large data blocks was 86.8 MB/s. Transferring 250 JPG image files (approx. 5 MB each) was performed at roughly 68 MB/s. 

Accessories

The laptop is shipped with a quick-start poster and warranty information.

Operating System

Windows 8.1 (64-bit) was preloaded on our review sample. A recovery medium is not included. The Flex 2 can be updated to Windows 10 for free. Users can also downgrade to Windows 7 when preferred. Lenovo provides the necessary drivers.

Maintenance

Accessing the laptop's innards is possible despite the lack of a maintenance hatch. The bottom tray can be pried open using a putty knife or spudger and then simply be removed after releasing all screws. The Flex 2 Pro offers two working memory banks that are both fitted with an 8 GB module. Replacing the hard drive would not be a problem, either. The battery could also be exchanged in case of damage.

Warranty

Lenovo includes a two-year warranty on the Flex 2 Pro. The warranty period can be extended to three years for approximately 50 to 60 Euros (~$56 to ~$68) more. Tip: Lenovo lists all available warranty upgrades for a device on its website. It is also possible to buy a warranty extension directly.

Input Devices

Keyboard

Lenovo furnishes its Flex 2 Pro with a backlit chiclet keyboard. The backlight has two brightness levels and can be turned on and off via a function key. The typical Lenovo-style keys are very lightly concave and have a sleek surface. They feature a short drop and clear pressure point. We also like their resistance. All in all, Lenovo provides a keyboard that is also suitable for frequent typing here.

Touchpad

A multitouch ClickPad with a surface area of approximately 10.7 x 7.1 cm is installed as the mouse replacement. It thus offers plenty of room for gesture control. The pad features a sleek surface that does not prevent the finger from gliding. The pad is not inserted absolutely impeccably. It juts out a bit too far in the lower left. The pad has a short drop and clear pressure point.

Touchscreen

The capacitive touchscreen supports 10 touch points. We did not encounter any problems and it responded instantaneously to our inputs.

Flex 2 Pro: Input devices
Flex 2 Pro: Input devices

Display

Lenovo installs a glare-type, 15.6-inch screen with a native resolution of 1920x1080 pixels in its Flex 2 Pro. Both the contrast (1015:1) and black level (0.27 cd/m²) range from good to very good. There is room for improvement in terms of brightness. A rate of 250.2 cd/m² is too low for a device from this price range. We would have expected a rate much closer to 300 cd/m².

226
cd/m²
257
cd/m²
233
cd/m²
214
cd/m²
274
cd/m²
240
cd/m²
200
cd/m²
263
cd/m²
255
cd/m²
Distribution of brightness
LG LP156WF4-SPL1
X-Rite i1Pro 2
Maximum: 274 cd/m² Average: 240.2 cd/m²
Brightness Distribution: 73 %
Center on Battery: 224 cd/m²
Contrast: 1015:1 (Black: 0.27 cd/m²)
ΔE Color 7.51 | 0.6-29.43 Ø6
ΔE Greyscale 7.43 | 0.64-98 Ø6.2
59% sRGB (Argyll 3D) 37% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.37
Flex 2 Pro vs. sRGB
Flex 2 Pro vs. sRGB
Flex 2 Pro vs. AdobeRGB
Flex 2 Pro vs. AdobeRGB

The screen presents a DeltaE 2000 shift of 7.51 in delivery state - the rate is neither good nor extremely bad. A shift less than three would be desirable. The screen does not exhibit a bluish cast. The screen cannot display either the sRGB or AdobeRGB color space. The coverage rates here are 59% (sRGB) and 37% (AdobeRGB).

CalMAN - ColorChecker
CalMAN - ColorChecker
CalMAN - Grayscale
CalMAN - Grayscale
CalMAN - Saturation Sweeps
CalMAN - Saturation Sweeps

Lenovo furnishes the Flex 2 Pro with an IPS panel. Thus, the screen remains legible from every position. The device cannot be used outdoors; the combination of a glare-screen surface and too low brightness thwarts that.

Flex 2 Pro outdoors
Flex 2 Pro outdoors
Viewing angles: Flex 2 Pro
Viewing angles: Flex 2 Pro
Lenovo Flex 2 Pro-15
IPS, 1920x1080
HP Envy 15-w000ng x360
TN-LED, 1366x768
Asus Transformer Book Flip TP500LN
TN LED, 1920x1080
HP Pavilion 15-ab022ng
TN LED, 1920x1080
Acer Aspire V3-574G-59MA
IPS, 1920x1080
Dell Inspiron 15-7548
IPS, 3840x2160
Acer Aspire V15 Nitro VN7-571G-574H
IPS, 1920x1080
Screen
-40%
-3%
-31%
-11%
-37%
17%
Brightness middle
274
183
-33%
154
-44%
223
-19%
257
-6%
214
-22%
320
17%
Brightness
240
196
-18%
143
-40%
215
-10%
247
3%
204
-15%
283
18%
Brightness Distribution
73
82
12%
84
15%
83
14%
84
15%
77
5%
83
14%
Black Level *
0.27
0.51
-89%
0.3
-11%
0.76
-181%
0.45
-67%
0.76
-181%
0.32
-19%
Contrast
1015
359
-65%
513
-49%
293
-71%
571
-44%
282
-72%
1000
-1%
Colorchecker DeltaE2000 *
7.51
12.45
-66%
4.84
36%
8.5
-13%
7.36
2%
5.83
22%
5.31
29%
Greyscale DeltaE2000 *
7.43
13.81
-86%
4.53
39%
9.35
-26%
7.82
-5%
7.17
3%
4.73
36%
Gamma
2.37 93%
2.33 94%
2.22 99%
2.46 89%
2.4 92%
1.94 113%
2.36 93%
CCT
6670 97%
16998 38%
7307 89%
10402 62%
6939 94%
5617 116%
5980 109%
Color Space (Percent of AdobeRGB 1998)
37
34
-8%
48
30%
42
14%
38
3%
52.9
43%
Color Space (Percent of sRGB)
59
54
-8%
66
12%
59.2
0%

* ... smaller is better

Performance

Lenovo offers a 15.6-inch, 2-in-1 all-rounder with its Flex 2 Pro 15. The laptop has more than enough computing power for everyday use and can also render games smoothly. Our review sample is sold for around 1000 Euros (~$1135). The device is also available for a price starting at 700 Euros (~$794) when concessions are made in configuration.

CPU-Z
CPU-Z
CPU-Z
CPU-Z
CPU-Z
CPU-Z
GPU-Z
GPU-Z
HWInfo
HWInfo
LatencyMon
 

Processor

Intel's Core i7-4510U dual-core processor is inside the Flex 2 Pro. It is an economic ULV processor with a TDP of 15 watts. The processor looks good in all application scenarios and should satisfy most users. The CPU clocks at a base speed of 2 GHz, which can be boosted to 2.8 GHz (both cores) or 3.1 GHz (one core only) via Turbo. The processor's full performance is only available in single-thread applications. The CPU performed these at 2.3 to 2.4 GHz. It processed multithread applications at 2.3 to 2.4 GHz. Thus, the CPU remains behind its potential in multithread applications.

It is surprising that Lenovo still has laptops that are furnished with this processor in October 2015. After all, a corresponding successor in form of the Core i7-5500U was launched on the market over a year ago. Lenovo also offers Flex 2 Pro 15 models based on the named successor. The Core i7-5500 averagely provides an approximately 10% higher performance compared with the Core i7-4510U - providing that both can utilize their full speeds.

CPU and GPU are soldered
CPU and GPU are soldered
Cinebench R10 Shading 32Bit
5463
Cinebench R10 Rendering Multiple CPUs 32Bit
7894
Cinebench R10 Rendering Single 32Bit
4486
Cinebench R11.5 OpenGL 64Bit
47.98 fps
Cinebench R11.5 CPU Multi 64Bit
2.53 Points
Cinebench R11.5 CPU Single 64Bit
1.36 Points
Cinebench R15 Ref. Match 64Bit
99.6 %
Cinebench R15 OpenGL 64Bit
60.1 fps
Cinebench R15 CPU Multi 64Bit
234 Points
Cinebench R15 CPU Single 64Bit
119 Points
Help
Cinebench R15
CPU Single 64Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
119 Points ∼55%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
103 Points ∼47% -13%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
86 Points ∼39% -28%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
105 Points ∼48% -12%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
96 Points ∼44% -19%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
63 Points ∼29% -47%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
112 Points ∼51% -6%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
108 Points ∼50% -9%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
121 Points ∼56% +2%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
96 Points ∼44% -19%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
109 Points ∼50% -8%
CPU Multi 64Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
234 Points ∼5%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
258 Points ∼6% +10%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
232 Points ∼5% -1%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
260 Points ∼6% +11%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
259 Points ∼6% +11%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
195 Points ∼4% -17%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
289 Points ∼7% +24%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
258 Points ∼6% +10%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
294 Points ∼7% +26%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
228 Points ∼5% -3%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
261 Points ∼6% +12%
Cinebench R11.5
CPU Single 64Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
1.36 Points ∼55%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
1.15 Points ∼47% -15%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
1.24 Points ∼50% -9%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
1.13 Points ∼46% -17%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
0.79 Points ∼32% -42%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
1.42 Points ∼58% +4%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
1.26 Points ∼51% -7%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
1.42 Points ∼58% +4%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
1.13 Points ∼46% -17%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
1.1 Points ∼45% -19%
CPU Multi 64Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
2.53 Points ∼6%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2.84 Points ∼6% +12%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2.73 Points ∼6% +8%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
2.84 Points ∼6% +12%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
2.3 Points ∼5% -9%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
3.18 Points ∼7% +26%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
2.78 Points ∼6% +10%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
3.21 Points ∼7% +27%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
2.48 Points ∼6% -2%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2.9 Points ∼7% +15%
Cinebench R10
Rendering Single 32Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
4486 Points ∼41%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
4158 Points ∼38% -7%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
4174 Points ∼39% -7%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
4176 Points ∼39% -7%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
2170 Points ∼20% -52%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
4651 Points ∼43% +4%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
4131 Points ∼38% -8%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
4634 Points ∼43% +3%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
3712 Points ∼34% -17%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
4161 Points ∼38% -7%
Rendering Multiple CPUs 32Bit (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
7894 Points ∼12%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
8631 Points ∼13% +9%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
8500 Points ∼13% +8%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
8509 Points ∼13% +8%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
6403 Points ∼10% -19%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
9792 Points ∼15% +24%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
8699 Points ∼13% +10%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
9950 Points ∼15% +26%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
7614 Points ∼12% -4%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
8664 Points ∼13% +10%
Geekbench 3
32 Bit Multi-Core Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
5666 Points ∼7%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
5009 Points ∼6% -12%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
4578 Points ∼6% -19%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
5955 Points ∼7% +5%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
5268 Points ∼7% -7%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
6074 Points ∼8% +7%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
4533 Points ∼6% -20%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
5328 Points ∼7% -6%
32 Bit Single-Core Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
2947 Points ∼60%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2500 Points ∼51% -15%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
1941 Points ∼40% -34%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
2858 Points ∼59% -3%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
2654 Points ∼54% -10%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
2960 Points ∼61% 0%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
2351 Points ∼48% -20%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2672 Points ∼55% -9%
Sunspider - 1.0 Total Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
96.6 ms * ∼1%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
109.9 ms * ∼1% -14%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
110.1 ms * ∼1% -14%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
154 ms * ∼2% -59%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
96.9 ms * ∼1% -0%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
119.8 ms * ∼1% -24%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
102.7 ms * ∼1% -6%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
126 ms * ∼1% -30%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
109.7 ms * ∼1% -14%
Mozilla Kraken 1.1 - Total Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
2323.9 ms * ∼4%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2592.8 ms * ∼4% -12%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2577.2 ms * ∼4% -11%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
2263 ms * ∼4% +3%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
2275 ms * ∼4% +2%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
2609.1 ms * ∼4% -12%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
2266.6 ms * ∼4% +2%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2565.4 ms * ∼4% -10%
Octane V2 - Total Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
14329 Points ∼27%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
12219 Points ∼23% -15%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
12716 Points ∼24% -11%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
15276 Points ∼29% +7%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
14240 Points ∼27% -1%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
12452 Points ∼24% -13%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
14472 Points ∼28% +1%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
12860 Points ∼25% -10%
Peacekeeper - --- (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
2659 Points ∼43%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
1743 Points ∼28% -34%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
2744 Points ∼44% +3%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
2335 Points ∼38% -12%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
2688 Points ∼43% +1%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2466 Points ∼40% -7%

* ... smaller is better

System Performance

It should not be surprising that the Flex 2 Pro runs absolutely smoothly, considering that the laptop sports a strong processor and swift solid state drive. The PCMark benchmarks scores are also good. Our comparison chart shows that HP's Envy 15-w000ng x360 can clearly outperform Lenovo's device in PCMark 8. That is owed to the lower screen resolution (1366x768 pixels) of HP's laptop. The Flex 2 Pro delivers similar scores when its desktop resolution is reduced to that level. The system performance of the Flex 2 Pro cannot be improved. Lenovo has pulled out all the stops here.

Two working memory banks are present
Two working memory banks are present
PCMark 7 Score
5074 points
PCMark 8 Home Score Accelerated v2
3209 points
PCMark 8 Creative Score Accelerated v2
3808 points
PCMark 8 Work Score Accelerated v2
4309 points
Help
PCMark 8 - Home Score Accelerated v2 (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
3209 Points ∼53%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2846 Points ∼47% -11%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
3130 Points ∼51% -2%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
3612 Points ∼59% +13%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
2825 Points ∼46% -12%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
3069 Points ∼50% -4%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
3187 Points ∼52% -1%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
2805 Points ∼46% -13%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
2674 Points ∼44% -17%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2962 Points ∼49% -8%
PCMark 7 - Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
5074 Points ∼55%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2558 Points ∼28% -50%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
3991 Points ∼44% -21%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
5071 Points ∼55% 0%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
3290 Points ∼36% -35%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
2937 Points ∼32% -42%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
4857 Points ∼53% -4%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
5417 Points ∼59% +7%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2710 Points ∼30% -47%

Storage Device

Lenovo installs a solid state drive from Samsung in the Flex 2 Pro. It is a 2.5-inch model with a total capacity of 256 GB. Approximately 170 GB of that is available for the user. The Windows installation, recovery partition and a backup partition reserve the remaining storage capacity. The latter contains the drivers and preloaded applications. All in all, the SSD delivers good transfer rates.

It is easy to replace the solid state drive
It is easy to replace the solid state drive
Samsung SSD PM851 256 GB MZ7TE256HMHP
Sequential Read: 525.2 MB/s
Sequential Write: 221.4 MB/s
512K Read: 444.5 MB/s
512K Write: 265 MB/s
4K Read: 36.56 MB/s
4K Write: 111.8 MB/s
4K QD32 Read: 322.5 MB/s
4K QD32 Write: 186.3 MB/s

Graphics Card

Lenovo uses a mid-range GPU in its Flex 2 Pro, namely a GeForce 840M graphics core. It supports DirectX 11 and clocks at a base speed of 1029 MHz that can be boosted to 1124 MHz via Turbo. The 3DMark benchmark scores range on a normal level for this graphics core. The direct successor of the 840 core is on the market in the form of the GeForce 940M GPU. However, there is no imperative reason to buy a correspondingly equipped laptop. The 940 core can only boast with a very marginal performance plus (less than 5%).

In addition to the GeForce GPU, Intel's HD Graphics 4400 graphics core is also inside Lenovo's computer. They both create a graphics-switching solution (Optimus). Intel's GPU is active in routine use and in battery mode. The GeForce core is enabled in applications that demand high graphics performance - for example computer games. Switching between both cores is automated, but the user can always intervene.

3DMark 06 Standard
11269 points
3DMark 11 Performance
2370 points
3DMark Ice Storm Standard Score
45336 points
3DMark Cloud Gate Standard Score
5939 points
3DMark Fire Strike Score
1366 points
Help
3DMark 11 - 1280x720 Performance (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
2370 Points ∼7%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2131 Points ∼6% -10%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2322 Points ∼7% -2%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2172 Points ∼6% -8%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
3269 Points ∼9% +38%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
2701 Points ∼8% +14%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
2437 Points ∼7% +3%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
2450 Points ∼7% +3%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
2026 Points ∼6% -15%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
2354 Points ∼7% -1%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
2391 Points ∼7% +1%
3DMark
1920x1080 Fire Strike Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
1366 Points ∼5%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
1268 Points ∼4% -7%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
1309 Points ∼5% -4%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
1011 Points ∼4% -26%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
1514 Points ∼5% +11%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
1687 Points ∼6% +23%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
1391 Points ∼5% +2%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
1432 Points ∼5% +5%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
1129 Points ∼4% -17%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
1361 Points ∼5% 0%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
1355 Points ∼5% -1%
1280x720 Sky Diver Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
5174 Points ∼8%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
3768 Points ∼6% -27%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
5398 Points ∼8% +4%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
5360 Points ∼8% +4%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
3316 Points ∼5% -36%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
5109 Points ∼8% -1%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
5106 Points ∼8% -1%
1280x720 Cloud Gate Standard Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
5939 Points ∼9%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
5790 Points ∼9% -3%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
5452 Points ∼8% -8%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
4377 Points ∼7% -26%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
5932 Points ∼9% 0%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
5261 Points ∼8% -11%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
6512 Points ∼10% +10%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
6160 Points ∼9% +4%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
4366 Points ∼7% -26%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
5530 Points ∼8% -7%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
5723 Points ∼9% -4%
1280x720 Ice Storm Standard Score (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
45336 Points ∼4%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
50600 Points ∼5% +12%
Asus Transformer Book Flip TP500LN
GeForce 840M, 4210U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
44738 Points ∼4% -1%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
30669 Points ∼3% -32%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
41517 Points ∼4% -8%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
49599 Points ∼4% +9%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
47495 Points ∼4% +5%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
14562 Points ∼1% -68%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
51395 Points ∼5% +13%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
45771 Points ∼4% +1%
3DMark 06 - 1280x1024 Standard AA:0x AF:0x (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
11269 Points ∼23%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
8179 Points ∼17% -27%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
11543 Points ∼24% +2%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
8336 Points ∼17% -26%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
10024 Points ∼20% -11%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
11575 Points ∼24% +3%

Gaming Performance

The Flex 2 Pro allows playing computer games. The installed hardware manages to render many games in the HD resolution (1366x768 pixels) using medium to high quality settings. Performance-driven games, such as Evolve require reducing the resolution/quality level. That is, however, not enough for games like Batman: Arkham Knight. It is not possible to achieve gaming-suitable frame rates here. Only a few games allow using the screen's Full HD resolution. That is limited to older games or games with only low hardware requirements.

Users who want more gaming power will have to take another computer. There are barely any devices that feature stronger GPUs in the Convertible/2-in-1 sector. A conventional laptop would have to be taken. For example, Acer's Aspire VN7-571G would be an option. The latter is available with GeForce GTX 850M or GTX 950M graphics cores among other things. The prices currently start at approximately 830 Euros (~$942).

low med. high ultra
Tomb Raider (2013) 128.8 61.5 33.5 16.6 fps
GRID: Autosport (2014) 156.4 66.4 29.9 15.2 fps
Alien: Isolation (2014) 65.1 42.8 22 16.6 fps
F1 2014 (2014) 109 84 58 32 fps
Assassin's Creed Unity (2014) 27.2 17.4 8.1 5.7 fps
Far Cry 4 (2014) 44.4 29.4 13.3 12 fps
Dragon Age: Inquisition (2014) 40.9 25.1 16.1 11.8 fps
Battlefield Hardline (2015) 71.7 50.2 18 10.7 fps
Dirt Rally (2015) 183.2 45.1 22.6 12.5 fps
The Witcher 3 (2015) 29 17.6 9.2 6.3 fps
Batman: Arkham Knight (2015) 25 21 12 7 fps
Metal Gear Solid V (2015) 58 39.9 16.1 11.9 fps
Mad Max (2015) 34.4 17 15.5 fps
World of Warships (2015) 103.4 78.1 36.6 22.5 fps
FIFA 16 (2015) 88.5 57.9 38.5 fps
Tomb Raider
1366x768 High Preset AA:FX AF:8x (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
33.5 fps ∼7%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
31.9 fps ∼6% -5%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
29 fps ∼6% -13%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
36.2 fps ∼7% +8%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
41.8 fps ∼8% +25%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
34 fps ∼7% +1%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
35 fps ∼7% +4%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
28.9 fps ∼6% -14%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
33.1 fps ∼7% -1%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
33 fps ∼7% -1%
1366x768 Normal Preset AA:FX AF:4x (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
61.5 fps ∼11%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
58.7 fps ∼10% -5%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
36.7 fps ∼6% -40%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
50 fps ∼9% -19%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
74.5 fps ∼13% +21%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
61.6 fps ∼11% 0%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
64.8 fps ∼11% +5%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
41.9 fps ∼7% -32%
Acer Aspire V3-572PG-604M
GeForce 840M, 4200U, WDC Scorpio Blue WD10JPVX-22JC3T0
61.6 fps ∼11% 0%
Acer Aspire E5-571G-520X
GeForce 840M, 5200U, Toshiba MQ01ABD100
62 fps ∼11% +1%
GRID: Autosport
1366x768 Medium Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
66.4 fps ∼29%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
58.3 fps ∼25% -12%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
47.4 fps ∼21% -29%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
53.8 fps ∼23% -19%
1024x768 Ultra Low Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
156.4 fps ∼36%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
98.4 fps ∼23% -37%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
91 fps ∼21% -42%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
146.7 fps ∼34% -6%
F1 2014
1920x1080 High Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
58 fps ∼44%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
45 fps ∼34% -22%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
31 fps ∼23% -47%
1366x768 Medium Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
84 fps ∼63%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
66 fps ∼50% -21%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
59 fps ∼44% -30%
Far Cry 4
1366x768 Medium Graphics Quality (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
29.4 fps ∼20%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
26.7 fps ∼19% -9%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
22.6 fps ∼16% -23%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
31.6 fps ∼22% +7%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
27.8 fps ∼19% -5%
1024x768 Low Graphics Quality (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
44.4 fps ∼30%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
38.6 fps ∼26% -13%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
32.1 fps ∼22% -28%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
40.8 fps ∼27% -8%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
38.4 fps ∼26% -14%
Battlefield Hardline
1366x768 Medium Graphics Quality (DX11) (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
50.2 fps ∼25%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
46.3 fps ∼23% -8%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
43.5 fps ∼22% -13%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
34 fps ∼17% -32%
1024x768 Low Graphics Quality (DX11) (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
71.7 fps ∼36%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
61.3 fps ∼31% -15%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
59.3 fps ∼30% -17%
Dell Inspiron 15-7548
Radeon R7 M270, 5500U, Liteon IT LCS-256L9S-11
47.4 fps ∼24% -34%
Dirt Rally
1366x768 Medium Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
45.1 fps ∼21%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
42.2 fps ∼19% -6%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
31.7 fps ∼15% -30%
Lenovo Z51-70
Radeon R9 M375, 5200U, Samsung PM871 MZYLN256HCHP
40.8 fps ∼19% -10%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
28 fps ∼13% -38%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
45.8 fps ∼21% +2%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
46.4 fps ∼21% +3%
1024x768 Ultra Low Preset (sort by value)
Lenovo Flex 2 Pro-15
GeForce 840M, 4510U, Samsung SSD PM851 256 GB MZ7TE256HMHP
183.2 fps ∼36%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
137.4 fps ∼27% -25%
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
125 fps ∼24% -32%
HP Pavilion 15-ab052ng
Radeon R8 M365DX, A10-8700P, Seagate ST1000LM014 Solid State Hybrid Drive
72.3 fps ∼14% -61%
HP Pavilion 15-ab022ng
GeForce 940M, 5500U, HGST Travelstar 5K1000 HTS541010A9E680
187 fps ∼36% +2%
Acer Aspire V3-574G-59MA
GeForce 940M, 5200U, Kingston RBU-SC150S37256GD
146.1 fps ∼28% -20%

Emissions

System Noise

The fan in the Flex 2 Pro is sometimes inactive when idling. However, it usually runs at a low speed, and it produces a quiet, consistent noise. The fan speeds up under load. We measured a noise level of 40.1 dB in the stress test, which is acceptable. This rate is not least owed to processor throttling during the stress test. The fan does not produce annoying side noises like whistling or buzzing.

The fan is sometimes inactive
The fan is sometimes inactive

Noise Level

Idle
29.6 / 32.2 / 32.3 dB(A)
Load
39.1 / 40.1 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Voltcraft sl-320 (15 cm distance)
Lenovo Flex 2 Pro-15
4510U, GeForce 840M
HP Envy 15-w000ng x360
5200U, GeForce 930M
Asus Transformer Book Flip TP500LN
4210U, GeForce 840M
HP Pavilion 15-ab022ng
5500U, GeForce 940M
Acer Aspire V3-574G-59MA
5200U, GeForce 940M
Dell Inspiron 15-7548
5500U, Radeon R7 M270
Acer Aspire V15 Nitro VN7-571G-574H
5200U, GeForce GTX 850M
Noise
-5%
2%
-15%
-6%
5%
-2%
off / environment *
Idle Minimum *
29.6
32.2
-9%
30.6
-3%
34.5
-17%
32.8
-11%
29
2%
31.9
-8%
Idle Average *
32.2
32.3
-0%
30.6
5%
34.5
-7%
32.8
-2%
29
10%
31.9
1%
Idle Maximum *
32.3
32.3
-0%
31.8
2%
34.5
-7%
32.8
-2%
29
10%
32.2
-0%
Load Average *
39.1
37.8
3%
37.4
4%
44.1
-13%
42.7
-9%
36.6
6%
37
5%
Load Maximum *
40.1
47.2
-18%
39.1
2%
52.5
-31%
43.4
-8%
41.5
-3%
43.3
-8%

* ... smaller is better

Temperature

Flex 2 Pro in the stress test
Flex 2 Pro in the stress test

The laptop processed the stress test (Prime95 and Furmark run for at least one hour) in the same manner in both AC and battery modes. The graphics core clocked stably at full speed (1124 MHz). The processor throttled to 1.5 GHz from 1.9 to 2 GHz after about 5 to 10 minutes and remained at that level. The laptop's temperature increase is overall very moderate. Only one measuring point surpassed 40 °C in the stress test.

Max. Load
 38.7 °C
102 F
39.5 °C
103 F
32 °C
90 F
 
 36.8 °C
98 F
34.9 °C
95 F
29.8 °C
86 F
 
 28.2 °C
83 F
26 °C
79 F
27.6 °C
82 F
 
Maximum: 39.5 °C = 103 F
Average: 32.6 °C = 91 F
31.8 °C
89 F
42 °C
108 F
37.4 °C
99 F
30.9 °C
88 F
33.7 °C
93 F
33.8 °C
93 F
28.2 °C
83 F
29.2 °C
85 F
28.3 °C
83 F
Maximum: 42 °C = 108 F
Average: 32.8 °C = 91 F
Power Supply (max.)  41.8 °C = 107 F | Room Temperature 21 °C = 70 F | Voltcraft IR-360
(±) The average temperature for the upper side under maximal load is 32.6 °C / 91 F, compared to the average of 30.3 °C / 87 F for the devices in the class Convertible.
(+) The maximum temperature on the upper side is 39.5 °C / 103 F, compared to the average of 35.4 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 42 °C / 108 F, compared to the average of 36.5 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 23.6 °C / 74 F, compared to the device average of 30.3 °C / 87 F.
(+) The palmrests and touchpad are cooler than skin temperature with a maximum of 28.2 °C / 82.8 F and are therefore cool to the touch.
(±) The average temperature of the palmrest area of similar devices was 28.9 °C / 84 F (+0.7 °C / 1.2 F).
Lenovo Flex 2 Pro-15
4510U, GeForce 840M
HP Envy 15-w000ng x360
5200U, GeForce 930M
Asus Transformer Book Flip TP500LN
4210U, GeForce 840M
HP Pavilion 15-ab022ng
5500U, GeForce 940M
Acer Aspire V3-574G-59MA
5200U, GeForce 940M
Dell Inspiron 15-7548
5500U, Radeon R7 M270
Acer Aspire V15 Nitro VN7-571G-574H
5200U, GeForce GTX 850M
Heat
-9%
-11%
-10%
-34%
-21%
-10%
Maximum Upper Side *
39.5
37.8
4%
41.6
-5%
38.7
2%
50
-27%
43.5
-10%
48.2
-22%
Maximum Bottom *
42
41.7
1%
46
-10%
40.2
4%
62.7
-49%
54
-29%
39.5
6%
Idle Upper Side *
24.6
28.9
-17%
28.4
-15%
30.8
-25%
34.6
-41%
29.8
-21%
28.3
-15%
Idle Bottom *
25
30.7
-23%
28.7
-15%
30.4
-22%
29.5
-18%
31
-24%
27
-8%

* ... smaller is better

Speakers

The stereo speakers in the Flex 2 Pro are situated on the underside of the devices front edge. They produce a decent sound that lacks bass. Speech is well-intelligible. The preloaded Dolby Digital Plus tool improves the sound even more.

The speakers are situated on the laptop's underside
The speakers are situated on the laptop's underside

Energy Management

Power Consumption

The Flex 2 Pro does not present any surprises in terms of power consumption. We measured up to 8.7 watts in idle mode - like we know from Haswell ULV laptops. The energy requirement increases to approximately 41.6 watts (+/- 5 watts) in gaming routine. That is also a normal rate for the installed hardware platform. The power consumption was only almost 2 watts higher in the stress test. Processor throttling became evident here. The power supply has a nominal output of 65 watts.

Power Consumption
Off / Standbydarklight 0.2 / 0.5 Watt
Idledarkmidlight 4 / 7.8 / 8.7 Watt
Load midlight 41.6 / 43.9 Watt
 color bar
Key: min: dark, med: mid, max: light        Voltcraft VC 940
Lenovo Flex 2 Pro-15
4510U, GeForce 840M
HP Envy 15-w000ng x360
5200U, GeForce 930M
Asus Transformer Book Flip TP500LN
4210U, GeForce 840M
HP Pavilion 15-ab022ng
5500U, GeForce 940M
Acer Aspire V3-574G-59MA
5200U, GeForce 940M
Dell Inspiron 15-7548
5500U, Radeon R7 M270
Acer Aspire V15 Nitro VN7-571G-574H
5200U, GeForce GTX 850M
Power Consumption
16%
-59%
-12%
-7%
-57%
-46%
Idle Minimum *
4
3.3
17%
9.8
-145%
4.8
-20%
3.9
2%
6.1
-53%
5.4
-35%
Idle Average *
7.8
6
23%
12.2
-56%
8.1
-4%
7.2
8%
15
-92%
11.5
-47%
Idle Maximum *
8.7
7.8
10%
12.9
-48%
8.3
5%
8.5
2%
15.5
-78%
12.8
-47%
Load Average *
41.6
30.3
27%
49.2
-18%
42.5
-2%
47.5
-14%
47.7
-15%
48.6
-17%
Load Maximum *
43.9
42.3
4%
55.3
-26%
61.1
-39%
58.9
-34%
64.1
-46%
79.8
-82%

* ... smaller is better

Battery Runtime

The Flex 2 Pro achieves an idle runtime of 11:50 hours. The HP Envy 15-w000ng x360 rival (12:51 h) lasts longer. Idle mode is determined using the Battery Eater Reader's test. The screen is set to minimum brightness, the energy-saving profile is enabled, and the wireless modules are disabled. The Flex 2 Pro shuts down after 1:35 hours under load. It again lags behind the Envy (1:47 h). Load runtime is ascertained using the Battery Eater Classic test. Here, the screen runs at maximum, and the high performance profile and the radio modules are enabled.

The laptop stopped our real world Wi-Fi test after 5:21 hours. Once again, the Envy (6:34 h) exhibits more stamina. This test simulates the load required for opening websites. The "Balanced" profile is active, and the screen's brightness is set to approximately 150 cd/m². We test the video playback time by running the short movie Big Buck Bunny (H.264 encoding, 1920x1080 pixels) in a loop. The wireless modules are disabled, and the screen's brightness is set to approximately 150 cd/m². The Flex 2 Pro achieved a runtime of 5:49 hours. We did not perform this test on the Envy.

All in all, the battery life of Lenovo's laptop is absolutely satisfactory but will not awe anyone. It is not surprising that the Flex 2 Pro lags behind the Envy since the latter features a dark, lower resolution screen and also has a slightly higher battery capacity.

The battery has a capacity of 44.4 Wh
The battery has a capacity of 44.4 Wh
Battery Runtime
Idle (without WLAN, min brightness)
11h 50min
NBC WiFi Websurfing Battery Test 1.3 (IE 11)
5h 21min
Big Buck Bunny H.264 1080p
5h 29min
Load (maximum brightness)
1h 35min
Lenovo Flex 2 Pro-15
44 Wh
HP Envy 15-w000ng x360
48 Wh
Asus Transformer Book Flip TP500LN
48 Wh
HP Pavilion 15-ab022ng
41 Wh
Acer Aspire V3-574G-59MA
37 Wh
Dell Inspiron 15-7548
56 Wh
Acer Aspire V15 Nitro VN7-571G-574H
52 Wh
Battery Runtime
15%
-38%
-14%
-10%
-18%
38%
Reader / Idle
710
771
9%
452
-36%
563
-21%
673
-5%
633
-11%
797
12%
H.264
329
231
-30%
294
-11%
271
-18%
238
-28%
427
30%
WiFi v1.3
321
394
23%
267
-17%
281
-12%
264
-18%
448
40%
Load
95
107
13%
49
-48%
88
-7%
91
-4%
81
-15%
161
69%
WiFi
276

Pros

+ high-contrast, Full HD IPS screen
+ swift solid state drive
+ decent battery life
+ low temperature development
+ usually runs quietly
+ backlit keyboard
+ 16 GB RAM

Cons

- glare-type screen

Verdict

In review: Lenovo Flex 2 Pro 15. Test model courtesy of Notebooksbilliger
In review: Lenovo Flex 2 Pro 15. Test model courtesy of Notebooksbilliger

Lenovo's Flex 2 Pro 15 is a 15.6-inch, 2-in-1 all-rounder. The lack of a Tablet Mode, like the devices in Lenovo's Yoga line feature, prevents the device from being a full-fledged convertible. The Flex 2 Pro has more than enough computing power for routine use. It can even render games owing to the GeForce GPU. The laptop does not heat up excessively and does not produce much noise. A swift solid state drive ensures a quick-running system. We generally like the Full HD IPS screen. It presents an attractive image and delivers a good contrast. Only its brightness could be higher. We would also have appreciated a non-glare screen. The battery life is satisfactory, and Lenovo does not present weaknesses in terms of input devices, either. However, Lenovo could have put more effort in the casing. Although the laptop does not have a maintenance hatch, it is quite easy to access the innards. The base unit's underside is easy to remove. At a price of almost 1000 Euros (~$1135), the computer is not one of the cheapest models - the configuration (SSD, 16 GB RAM) becomes obvious here.

Lenovo's Flex 2 Pro is an all-rounder that does not present any severe shortcomings. It is nevertheless a relatively special device. The Flex 2 Pro's Stand Mode makes it different from conventional 15.6-inch laptops. Users who do not need this mode will be happier with a conventional laptop.

Acer's Aspire VN7-571G mentioned earlier might be an alternative. It is a slim, 15.6-inch all-rounder with a light focus on gaming. The laptop offers a matte Full HD IPS screen and a better battery life than the Flex 2 Pro. The Aspire is available for a price starting at around 770 Euros, ~$874 (GeForce 840M model).

Side note: We do not really deem HP's Envy 15-w000ng x360 as an alternative for the Flex 2 Pro. HP's convertible is equipped with a dark, lower resolution screen that is also a viewing-angle dependent TN panel. Installing this kind of screen in a convertible was a rather irrational idea on the part of HP.

Lenovo Flex 2 Pro-15 - 10/08/2015 v4(old)
Sascha Mölck

Chassis
76 / 98 → 78%
Keyboard
80%
Pointing Device
81%
Connectivity
61 / 80 → 76%
Weight
61 / 35-78 → 60%
Battery
86%
Display
84%
Games Performance
81 / 68 → 100%
Application Performance
84 / 87 → 97%
Temperature
91%
Noise
88%
Audio
50 / 91 → 55%
Camera
40 / 85 → 47%
Average
74%
78%
Convertible - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Archive of our own reviews > Lenovo Flex 2 Pro 15 Notebook Review
Sascha Mölck, 2015-10-11 (Update: 2018-05-15)