Notebookcheck

Lenovo Z51-70 Notebook Review

Sascha Mölck (translated by Martina Osztovits), 09/17/2015

Average fare. No maintenance hatch, fixed battery, clattery keyboard, dark display, weak GPU - the Lenovo Z51 does not really provide rays of hope.

For the original German review, see here.

With the Z51, Lenovo launched the successor of the Z50 series. It brings changes inside as well as outside. Our in-depth review of the series' current top model, which will be available on our website soon, covers all changes/new features of the Z51 series. In this review, we will take a look at a technically slightly weaker model of the Z51 series. Computers like the Acer Aspire E5-573G and the Dell Inspiron 15-5558 compete with the Z51.

Lenovo Z51-70-80K6 (Z51 Series)
Graphics adapter
AMD Radeon R7 M360 - 2048 MB, Core: 980 MHz, Memory: 900 MHz, DDR3, Catalyst 15.8 (15.201.1151.0), Enduro
Memory
8192 MB 
, DDR-1600, single channel, two RAM slots (one RAM slot used)
Display
15.6 inch 16:9, 1920 x 1080 pixel, Chi Mei N156HGE-EAB, TN LED, glossy: no
Mainboard
Intel Broadwell-U PCH-LP (Premium)
Storage
Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB, 1000 GB 
, 5400 rpm, 850 GB free
Soundcard
Intel Wildcat Point-LP PCH - High Definition Audio Controller
Connections
1 USB 2.0, 2 USB 3.0 / 3.1 Gen1, 1 VGA, 1 HDMI, 1 Kensington Lock, Audio Connections: 3.5 mm combo, Card Reader: SD, Sensors: brightness sensor
Networking
Realtek RTL8168/8111 Gigabit-LAN (10/100/1000MBit), Intel Dual Band Wireless-AC 3160 (a/b/g/n/ac), Bluetooth 4.0
Optical drive
SlimtypeDVD A DA8A6SH
Size
height x width x depth (in mm): 26 x 380 x 265 ( = 1.02 x 14.96 x 10.43 in)
Battery
31 Wh Lithium-Ion
Operating System
Microsoft Windows 8.1 64 Bit
Camera
Webcam: HD web cam
Additional features
Speakers: Stereo, Keyboard: Chiclet, Keyboard Light: no, Lenovo Photo Master, Cyberlink Power2Go 8, Cyberlink PowerDirector 10, Lenovo PowerDVD 10, McAfee LiveSafe-Internet Security (trial version), MS Office (trial version), 24 Months Warranty
Weight
2.5 kg ( = 88.19 oz / 5.51 pounds), Power Supply: 347 g ( = 12.24 oz / 0.77 pounds)
Price
699 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Display

Lenovo equipped our test model with a matte 15.6-inch display with a native resolution of 1920x1080 pixels. The display delivers a brightness of 206.4 cd/m² - way too low for a 700-Euro (~$799) device. While the contrast (474:1) is still acceptable, it will not knock anyone's socks off.

205
cd/m²
218
cd/m²
209
cd/m²
199
cd/m²
218
cd/m²
195
cd/m²
194
cd/m²
218
cd/m²
202
cd/m²
Distribution of brightness
X-Rite i1Pro 2
Maximum: 218 cd/m² Average: 206.4 cd/m²
Brightness Distribution: 89 %
Center on Battery: 176 cd/m²
Contrast: 474:1 (Black: 0.46 cd/m²)
ΔE Color 11.08 | 0.4-29.43 Ø6.1
ΔE Greyscale 11.72 | 0.64-98 Ø6.4
59.3% sRGB (Argyll 3D) 37.8% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.48

The average DeltaE 2000 shift is 11.08 out-of-the-box. Such values are usual for low-priced notebooks. The target value would be smaller than 3. In addition, the display exhibits a visible bluish cast.

CalMAN - ColorChecker
CalMAN - ColorChecker
CalMAN - Gray levels
CalMAN - Gray levels
CalMAN - Color saturation
CalMAN - Color saturation

Lenovo equipped the Z51 with a TN panel with narrow viewing angles. Thus, it is not possible to read from the screen from all positions. It is not really possible to use the notebook outdoors, since its brightness is too low.

The Lenovo Z51 outdoors.
The Lenovo Z51 outdoors.

Performance

Lenovo's 15.6-inch all-round device brings sufficient processing performance for everyday tasks and allows playing computer games to a limited degree. Our test model is priced at about 700 Euros (~$799). At the time of testing, there were only few other variants available. However, this might change in the coming weeks.

Processor

With the Core i5-5200U processor, the Z51 houses a mid-range CPU of the Broadwell generation. As the Z51 is an all-round computer, this is a good choice. With a TDP of 15 Watt, the processor is quite frugal. It works at a base clock of 2.2 GHz. Thanks to Turbo, the clock rate can increase to 2.5 GHz (both cores) or 2.7 GHz (single core). The Turbo is used in mains operation as well as on battery.

Cinebench R10 Shading 32Bit
5003
Cinebench R10 Rendering Multiple CPUs 32Bit
8500
Cinebench R10 Rendering Single 32Bit
4174
Cinebench R11.5 OpenGL 64Bit
23.51 fps
Cinebench R11.5 CPU Multi 64Bit
2.73 Points
Cinebench R11.5 CPU Single 64Bit
1.24 Points
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 OpenGL 64Bit
31.26 fps
Cinebench R15 CPU Multi 64Bit
260 Points
Cinebench R15 CPU Single 64Bit
105 Points
Help
Cinebench R15
CPU Single 64Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
105 Points ∼48%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
58 Points ∼27% -45%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
52 Points ∼24% -50%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
107 Points ∼49% +2%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
108 Points ∼50% +3%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
63 Points ∼29% -40%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
119 Points ∼55% +13%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
103 Points ∼47% -2%
CPU Multi 64Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
260 Points ∼6%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
159 Points ∼4% -39%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
174 Points ∼4% -33%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
258 Points ∼6% -1%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
261 Points ∼6% 0%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
176 Points ∼4% -32%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
272 Points ∼6% +5%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
258 Points ∼6% -1%
Cinebench R11.5
CPU Single 64Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
1.24 Points ∼51%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
1.37 Points ∼56% +10%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
0.68 Points ∼28% -45%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
0.6 Points ∼25% -52%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
1.26 Points ∼52% +2%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
1.26 Points ∼52% +2%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
0.66 Points ∼27% -47%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
1.35 Points ∼55% +9%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
1.15 Points ∼47% -7%
CPU Multi 64Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2.73 Points ∼10%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
2.89 Points ∼11% +6%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
1.81 Points ∼7% -34%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
1.57 Points ∼6% -42%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
2.76 Points ∼10% +1%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
2.8 Points ∼10% +3%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
1.91 Points ∼7% -30%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
2.92 Points ∼11% +7%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2.84 Points ∼10% +4%
Cinebench R10
Rendering Single 32Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
4174 Points ∼39%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
1992 Points ∼18% -52%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
2818 Points ∼26% -32%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
4003 Points ∼37% -4%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
4137 Points ∼38% -1%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
2059 Points ∼19% -51%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
4527 Points ∼42% +8%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
4158 Points ∼38% 0%
Rendering Multiple CPUs 32Bit (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
8500 Points ∼17%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
5276 Points ∼11% -38%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
4665 Points ∼9% -45%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
8579 Points ∼17% +1%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
8642 Points ∼17% +2%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
5531 Points ∼11% -35%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
9148 Points ∼18% +8%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
8631 Points ∼17% +2%
Geekbench 3
32 Bit Multi-Core Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
5009 Points ∼16%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
3772 Points ∼12% -25%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
3456 Points ∼11% -31%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
5312 Points ∼17% +6%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
5304 Points ∼17% +6%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
3801 Points ∼12% -24%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
5301 Points ∼17% +6%
32 Bit Single-Core Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2500 Points ∼52%
Lenovo IdeaPad Z50-75
Radeon R6 M255DX, A10-7300, Seagate ST1000LM014 Solid State Hybrid Drive
1632 Points ∼34% -35%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
1205 Points ∼25% -52%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
2675 Points ∼55% +7%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
2653 Points ∼55% +6%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
1492 Points ∼31% -40%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
2646 Points ∼55% +6%
Sunspider - 1.0 Total Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
110.1 ms * ∼1%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
293 ms * ∼3% -166%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
124.7 ms * ∼1% -13%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
115.6 ms * ∼1% -5%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
226.8 ms * ∼2% -106%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
113.7 ms * ∼1% -3%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
109.9 ms * ∼1% -0%
Mozilla Kraken 1.1 - Total Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2577.2 ms * ∼4%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
7454 ms * ∼13% -189%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
2577.5 ms * ∼4% -0%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
2554 ms * ∼4% +1%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
4634.3 ms * ∼8% -80%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
2321.3 ms * ∼4% +10%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2592.8 ms * ∼4% -1%
Octane V2 - Total Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
12716 Points ∼26%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
4913 Points ∼10% -61%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
11380 Points ∼23% -11%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
12753 Points ∼26% 0%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
7568 Points ∼15% -40%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
13750 Points ∼28% +8%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
12219 Points ∼25% -4%
Peacekeeper - --- (sort by value)
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
2397 Points ∼39%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
2420 Points ∼39%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
1411 Points ∼23%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
2698 Points ∼44%

* ... smaller is better

System Performance

We cannot complain about the system performance. Everything runs smoothly and the results of the PCMark benchmarks are very good. The Z51 is on par with computers with more powerful graphics cards. This is due to the PCMark 8 benchmark favoring AMD GPUs. It is possible to further increase the system performance. Adding a second RAM module would activate dual-channel mode. However, replacing the hard drive with a Solid State Drive would have the biggest effect. The system would be overall more responsive and Windows would boot faster.

PCMark 8 Home Score Accelerated v2
3130 points
PCMark 8 Creative Score Accelerated v2
3706 points
PCMark 8 Work Score Accelerated v2
4206 points
Help
PCMark 8 - Home Score Accelerated v2 (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
3130 Points ∼51%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
2909 Points ∼48% -7%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
1958 Points ∼32% -37%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
3377 Points ∼55% +8%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
2830 Points ∼46% -10%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
2622 Points ∼43% -16%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
3291 Points ∼54% +5%

Storage Devices

Lenovo equipped the Z51 with a hard drive from Seagate with a capacity of 1 TB and a revolution speed of 5400 rpm. CrystalDiskMark reports a read rate of 107.4 MB/s. HD Tune delivers an average transfer rate of 84.8 MB/s. These are usual values for a 5400 rpm hard drive.

Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
Transfer Rate Minimum: 47.2 MB/s
Transfer Rate Maximum: 108.7 MB/s
Transfer Rate Average: 84.8 MB/s
Access Time: 17.1 ms
Burst Rate: 272.9 MB/s
CPU Usage: 5.4 %

Graphics Card

The AMD graphics core of the Z51 is called Radeon R7 M360. The GPU supports DirectX 12 and clocks at up to 980 MHz. The maximum clock rate is identical to the GPU of the predecessor, the Radeon R7 M260. Accordingly, the M360 performs similarly in the 3DMark benchmarks as its predecessor. Small improvements are due to the newer driver version. According to the 3DMark results, the GPU is lower mid-range or even rather entry-level. Nvidia's GeForce 920M GPU is the direct competitor of the R7 M360. The GeForce core wins the direct comparison in the 3DMark benchmarks as well as in real-world gaming.

The Enduro graphics switch allows switching between the AMD graphics core and the integrated HD Graphics 5500 GPU. The Radeon GPU is responsible for demanding applications like computer games. Intel's GPU is used for everyday tasks and on battery. Usually, the graphics cards are switched automatically, but it does not work as smoothly as the competition from Nvidia (Optimus). The user sometimes has to make manual readjustments.

3DMark 06 Standard
8179 points
3DMark 11 Performance
2172 points
3DMark Ice Storm Standard Score
30669 points
3DMark Cloud Gate Standard Score
4377 points
3DMark Fire Strike Score
1011 points
Help
3DMark 11 - 1280x720 Performance (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
2172 Points ∼7%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
2373 Points ∼8% +9%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
815 Points ∼3% -62%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
2539 Points ∼8% +17%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
1793 Points ∼6% -17%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
1904 Points ∼6% -12%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
1905 Points ∼6% -12%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
2131 Points ∼7% -2%
3DMark
1920x1080 Fire Strike Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
1011 Points ∼4%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
1312 Points ∼5% +30%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
522 Points ∼2% -48%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
1499 Points ∼6% +48%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
1050 Points ∼4% +4%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
963 Points ∼4% -5%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
946 Points ∼4% -6%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
1268 Points ∼5% +25%
1280x720 Sky Diver Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
3768 Points ∼6%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
1966 Points ∼3% -48%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
1966 Points ∼3% -48%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
5644 Points ∼10% +50%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
3984 Points ∼7% +6%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
3793 Points ∼6% +1%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
3740 Points ∼6% -1%
1280x720 Cloud Gate Standard Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
4377 Points ∼7%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
5934 Points ∼10% +36%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
3024 Points ∼5% -31%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
6492 Points ∼11% +48%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
5193 Points ∼9% +19%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
3902 Points ∼7% -11%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
4307 Points ∼7% -2%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
5790 Points ∼10% +32%
1280x720 Ice Storm Standard Score (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
30669 Points ∼3%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
28617 Points ∼3% -7%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
59535 Points ∼5% +94%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
44189 Points ∼4% +44%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
39475 Points ∼4% +29%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
30990 Points ∼3% +1%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
50600 Points ∼5% +65%

Gaming Performance

Although the Lenovo Z51-70 is an all-round notebook, computer games are only possible to quite a limited degree because of the weak GPU. Many games run smoothly with HD resolution (1366x768 pixels) and low to partly medium quality settings. Higher settings are partly possible in older games and games with low hardware requirements. Current top titles like The Witcher 3 or Batman: Arkham Knight never achieve sufficiently high frame rates.

Those who want to play frequently should select a notebook with a more powerful graphics card. Models with GeForce 940M or Radeon R9 M375 GPU can be recommended. A Z51 variant with the latter is available. An in-depth review of this model will be available on Notebookcheck.net soon. The predecessor of the Z51, the Lenovo Z50 can be recommended to frugal users. Currently models with Full HD display, Core i5-4210U processor and GeForce 840M graphics are available for below 500 Euros (~$571). Z50 models with the mentioned hardware achieve significantly higher frame rates than this Z51 model.

low med. high ultra
Anno 2070 (2011) 79.841.826.513.2fps
Tomb Raider (2013) 70.736.72914.6fps
Wolfenstein: The New Order (2014) 36.634.917.2fps
Watch Dogs (2014) 31.120.36.43.3fps
Risen 3: Titan Lords (2014) 36.122.47.85.3fps
Middle-earth: Shadow of Mordor (2014) 25.617.39.86.3fps
Alien: Isolation (2014) 38.727.315.212.7fps
Ryse: Son of Rome (2014) 2616.47.84.9fps
The Evil Within (2014) 282012.5fps
Assassin's Creed Unity (2014) 2013.38.15.4fps
Far Cry 4 (2014) 32.122.610.47.6fps
Dragon Age: Inquisition (2014) 33.926.815.310.2fps
The Crew (2014) 26.420.7118.1fps
Dirt Rally (2015) 12531.716.312.5fps
Metal Gear Solid V (2015) 39.827.411.26.8fps
Mad Max (2015) 21.810.57.1fps
Tomb Raider
1366x768 Normal Preset AA:FX AF:4x (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
36.7 fps ∼6%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
58.8 fps ∼10% +60%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
14.9 fps ∼3% -59%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
68.3 fps ∼12% +86%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
43.3 fps ∼8% +18%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
41.1 fps ∼7% +12%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
36.2 fps ∼6% -1%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
58.7 fps ∼10% +60%
1024x768 Low Preset (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
70.7 fps ∼11%
Lenovo IdeaPad Z50-70 (59427656)
GeForce 840M, 4510U, Seagate ST1000LM014 Solid State Hybrid Drive
123.3 fps ∼20% +74%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
27.8 fps ∼4% -61%
Acer Aspire E5-573G-5785
GeForce 940M, 5200U, Seagate ST500LM000 Solid State Hybrid Drive
138.5 fps ∼22% +96%
Dell Inspiron 15-5558
GeForce 920M, 5200U, Toshiba MQ01ABD100
83.8 fps ∼13% +19%
HP Pavilion 15-p151ng
Radeon R7 M260, A10-5745M, Seagate ST1000LM014 Solid State Hybrid Drive
63.7 fps ∼10% -10%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
68.7 fps ∼11% -3%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
118.2 fps ∼19% +67%
Far Cry 4
1366x768 Medium Graphics Quality (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
22.6 fps ∼16%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
20.6 fps ∼14% -9%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
26.7 fps ∼19% +18%
1024x768 Low Graphics Quality (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
32.1 fps ∼22%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
29.1 fps ∼20% -9%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
38.6 fps ∼26% +20%
Alien: Isolation
1366x768 Medium, On (AA & SSAO Off), Shadow Map 1024 AF:4x (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
27.3 fps ∼9%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
11.5 fps ∼4% -58%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
19.9 fps ∼6% -27%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
32.8 fps ∼11% +20%
1024x768 (Very) Low, Off, Shadow Map 512 AF:1x (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
38.7 fps ∼12%
Toshiba Satellite C55D-C-10P Carrizo-L
Radeon R5 (Beema/Carrizo-L), A8-7410, Toshiba MQ01ABD100
18.4 fps ∼6% -52%
Toshiba Satellite L50-B-1TD
Radeon R7 M260, 4510U, Toshiba HG6 THNSNJ256GMCU
25.4 fps ∼8% -34%
HP Envy 15-w000ng x360
GeForce 930M, 5200U, Hitachi Travelstar Z5K500 HTS545050A7E680
45.7 fps ∼14% +18%
Risen 3: Titan Lords
1366x768 Medium, Off (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
22.4 fps ∼24%
1024x768 Low, Off (sort by value)
Lenovo Z51-70-80K6
Radeon R7 M360, 5200U, Seagate Momentus SpinPoint M8 ST1000LM024 HN-M101MBB
36.1 fps ∼36%

Emissions & Energy

System Noise

While idle, the fan even stands still sometimes, but usually it runs at low speed. In quiet environments a rustling noise is audible, but it is not especially annoying. During our stress test we measured a noise level of 40.7 dB, which is alright.

Noise Level

Idle
31.6 / 34 / 34.6 dB(A)
HDD
32 dB(A)
DVD
35 / dB(A)
Load
38.2 / 40.7 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)

Temperature

The Z51 during the stress test.
The Z51 during the stress test.

The Z51 behaves differently in the stress test (Prime95 and Furmark run for at least one hour) in mains operation and on battery. In mains operation, the processor clocks at 2.3 to 2.5 GHz for a few minutes. Afterwards, its clock rate falls to 2.1 GHz and remains there. The graphics core works at full speed (980 MHz) from the beginning. On battery the GPU only clocks at 300 MHz, while the processors works at 2.5 GHz. The temperature increase is only moderate. 40 °C is only exceeded in three measurement segments.

Max. Load
 46.8 °C
116 F
36.6 °C
98 F
25.6 °C
78 F
 
 46 °C
115 F
36.6 °C
98 F
25.8 °C
78 F
 
 35 °C
95 F
34.5 °C
94 F
25.9 °C
79 F
 
Maximum: 46.8 °C = 116 F
Average: 34.8 °C = 95 F
25.2 °C
77 F
32.9 °C
91 F
37.7 °C
100 F
25.5 °C
78 F
31.1 °C
88 F
41 °C
106 F
25.1 °C
77 F
28.3 °C
83 F
30.8 °C
87 F
Maximum: 41 °C = 106 F
Average: 30.8 °C = 87 F
Power Supply (max.)  42.5 °C = 109 F | Room Temperature 24.1 °C = 75 F | Voltcraft IR-360
(±) The average temperature for the upper side under maximal load is 34.8 °C / 95 F, compared to the average of 30.9 °C / 88 F for the devices in the class Multimedia.
(-) The maximum temperature on the upper side is 46.8 °C / 116 F, compared to the average of 36.5 °C / 98 F, ranging from 21.1 to 71 °C for the class Multimedia.
(±) The bottom heats up to a maximum of 41 °C / 106 F, compared to the average of 38.8 °C / 102 F
(+) In idle usage, the average temperature for the upper side is 24.1 °C / 75 F, compared to the device average of 30.9 °C / 88 F.
(+) The palmrests and touchpad are reaching skin temperature as a maximum (35 °C / 95 F) and are therefore not hot.
(-) The average temperature of the palmrest area of similar devices was 29.1 °C / 84.4 F (-5.9 °C / -10.6 F).

Power Consumption

In terms of power consumption, the Z51 proves to be very frugal while idle. We measured a maximum power consumption of 6.2 Watt - a good value. The energy demand also does not reach an unexpected high value under load. During our stress test we measured 43.3 Watt. The rated output of the power adapter is 65 Watt. Thus it has enough reserves. About 39 Watt (+/- 5 Watt) is realistic during real-world gaming. Hence, the Z51 requires slightly more energy than comparable computers like the Dell Inspiron 15-5558.

Power Consumption
Off / Standbydarklight 0 / 0.2 Watt
Idledarkmidlight 3.4 / 6.1 / 6.2 Watt
Load midlight 39 / 43.3 Watt
 color bar
Key: min: dark, med: mid, max: light        Voltcraft VC 940

Battery Life

In our realistic WLAN test, we simulate web surfing. The profile "balanced" is active and the display brightness is set to about 150 cd/m². The Z51 achieves a battery life of 5:34 h.

Battery Runtime
NBC WiFi Websurfing Battery Test 1.3 (IE 11)
5h 34min

Pros

+ Matte Full HD display
+ Works quietly most of the time
+ Big storage capacity
+ Decent battery life

Cons

- Dark display with narrow viewing angles
- Clattery keyboard
- No maintenance hatch
- Weak GPU

Verdict

In review: Lenovo Z51-70. Test model provided by Cyberport.de
In review: Lenovo Z51-70. Test model provided by Cyberport.de

The Lenovo Z51-70 brings sufficient processing performance to satisfy most users. The built-in graphics core allows occasional gaming. The computer usually works quietly and does not get especially warm. Thanks to a 1 TB hard drive, users won't lack storage capacity quickly. We are not delighted by the quite springy keyboard of the Z51. The matte Full HD display also deserves critique. Lenovo incorporated a dark TN model with narrow viewing angles. We expect more for a street price of about 700 Euros (~$799). Finally, Lenovo saved money with the graphics. Compared to the predecessor, the Lenovo Z50-70, there are further changes which we dislike. For example, Lenovo omitted the maintenance hatch and fixed the battery. You need to open the case of the Z51 in order to replace the hard drive or increase the RAM.

Overall, the Lenovo Z51 is rather a step backwards than a progress.

Thus, the predecessor is an inexpensive alternative to the Z51, too. Z50 models with Full HD display, Core i5-4210U processor, and GeForce 840M graphics are currently available for slightly below 500 Euros (~$571).

More information about the Lenovo Z51 series is available in our in-depth review of the current top model of the series, which comes with a Radeon R9 M375 graphics card and a Solid State Drive. The review will be available on our website soon.

Lenovo Z51-70-80K6 - 09/13/2015 v4(old)
Sascha Mölck

Chassis
69 / 98 → 70%
Keyboard
70%
Pointing Device
81%
Connectivity
67 / 81 → 83%
Weight
60 / 20-67 → 85%
Battery
89%
Display
77%
Games Performance
74 / 85 → 87%
Application Performance
79 / 92 → 86%
Temperature
89%
Noise
83 / 95 → 87%
Audio
50%
Camera
42 / 85 → 49%
Average
72%
78%
Multimedia - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Archive of our own reviews > Lenovo Z51-70 Notebook Review
Sascha Mölck, 2015-09-17 (Update: 2015-09-17)