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Lenovo Yoga C740-15IML Laptop Review: Strong Battery Life, Weak Display

Performance-degrading transformation. The dedicated graphics chip is gone without replacement, 4K UHD is no longer an option and there is no Thunderbolt 3 anymore, either: At first glance, the Lenovo Yoga C740-15IML appears to be a clear downgrade compared to its predecessor. While this holds true for some aspects of the convertible, other areas have seen some improvements. Unfortunately, our test model suffers from a very dimly lit display. Read our in-depth review to find out what else Lenovo does or does not do well.
Benjamin Herzig, 👁 Andreas Osthoff, Andrea Grüblinger (translated by Marius S.),

Lenovo has been steadily expanding its Yoga-laptop and Yoga-tablet portfolio over the past years and introduced a new naming scheme to differentiate between the models. While all Lenovo Yoga laptops were convertibles in the past, this only holds true for models of the Lenovo Yoga C series now. Thus, today's test device, the Lenovo Yoga C740-15IML, is a laptop-tablet hybrid. The name also identifies it as an upper mid-range (700 series) device with a 15.6-inch display.

The Lenovo Yoga C740-15IML integrates the latest Comet Lake processors. Our model includes an i7 processor that is accompanied by 16 GB of RAM and a 512-GB SSD. A Full HD (1920x1080) LCD serves as the device's screen. This configuration (81TD003YGE) can be purchased for about 1,050 Euros (~$1,167).

The predecessor of the Lenovo Yoga C740-15IML is the Lenovo Yoga 730-15IKB. The Lenovo Yoga C940-15IRH is a more expensive alternative to the Yoga C740. Furthermore, we will also draw comparisons between the C740-15IML and the Dell Inspiron 15 5579, Asus ZenBook Flip 15 and the HP Envy x360 15.

Lenovo Yoga C740-15IML
Processor
Intel Core i7-10510U 4 x 1.8 - 4.8 GHz, Comet Lake-U
Graphics adapter
Memory
16384 MB 
, DDR4-2666, onboard
Display
15.60 inch 16:9, 1920 x 1080 pixel 141 PPI, 10-point, native pen support, B156HAN02.5, IPS LED, glossy: no, HDR
Mainboard
Intel Comet Lake-U PCH-LP Premium
Storage
Samsung SSD PM981 MZVLB512HAJQ, 512 GB 
, M.2 2280 PCIe NVMe, 435 GB free
Soundcard
Intel Comet Lake PCH-LP - cAVS
Connections
4 USB 3.0 / 3.1 Gen1, 2 DisplayPort, Audio Connections: audio combo, 1 Fingerprint Reader, Sensors: Accelerometer
Networking
Intel Wi-Fi 6 AX201 (a/b/g/h/n = Wi-Fi 4/ac = Wi-Fi 5/ax = Wi-Fi 6), Bluetooth 5.1
Size
height x width x depth (in mm): 17.25 x 357.8 x 235.35 ( = 0.68 x 14.09 x 9.27 in)
Battery
60.3 Wh Lithium-Ion
Operating System
Microsoft Windows 10 Home 64 Bit
Camera
Webcam: 720p with privacy slider
Additional features
Speakers: 2-watt stereo, Keyboard: 6 rows chiclet with numpad, Keyboard Light: yes, Lenovo Active Pen 2, Lenovo USB type-C 3-in-1 hub, Lenovo Vantage, Lenovo Utility, Lenovo stylus configuration, Microsoft Office Trial, 24 Months Warranty
Weight
1.862 kg ( = 65.68 oz / 4.11 pounds), Power Supply: 355 g ( = 12.52 oz / 0.78 pounds)
Price
1149 Euro
Note: The manufacturer may use components from different suppliers including display panels, drives or memory sticks with similar specifications.

 

Rating
Date
Model
Weight
Height
Size
Resolution
Best Price
85 %
01/2020
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620
1.9 kg17.25 mm15.60"1920x1080
83 %
07/2018
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile
1.9 kg17.2 mm15.60"3840x2160
86 %
12/2019
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q
2 kg19.7 mm15.60"1920x1080
81 %
06/2018
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620
2.1 kg20.2 mm15.60"1920x1080
82 %
04/2018
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile
2.1 kg21 mm15.60"3840x2160
80 %
03/2018
HP Envy x360 15-bq102ng
R5 2500U, Vega 8
2.1 kg19.6 mm15.60"1920x1080

Case: Yoga Tablet with Aluminum Chassis

Lenovo Yoga C740-15IML
Lenovo Yoga C740-15IML

Lenovo has completely redesigned the chassis. In spite of this, the resemblance to its predecessor Lenovo Yoga 730-15IKB is indisputable. The visual design changes include the vertical Lenovo logo on the palm rests and the numpad, which has been moved to the right of the main QWERTY keys. As a result, the touchpad has been moved to the left. This time around, the chromed border around the touchpad has been omitted, which makes the design look cleaner overall.

As with the predecessor, the entire chassis is made of dark-gray aluminum. The construction has a premium feel, a high rigidity and the build quality is immaculate. The display and the base unit only allow for very minor twisting and the palm rests do not yield under pressure.

For a convertible, the quality of the hinges is of the utmost importance. Thankfully, Lenovo has done a good job in this regard. The two 360-degree hinges prevent teetering almost entirely. That being said, the lid cannot be opened one-handed, which is a bit of a shame.

Compared to the Lenovo Yoga 730-15IKB, nothing has changed in terms of the weight. However, the length of the Yoga C740-15IML is slightly shorter than that of its predecessor. Compared to the more expensive Lenovo Yoga C940-15IRH, the Yoga C740-15IML is lighter and thinner by about 2 millimeters.

Size Comparison

381.9 mm / 15 inch 253.1 mm / 9.96 inch 20.2 mm / 0.795 inch 2.1 kg4.6 lbs364 mm / 14.3 inch 246 mm / 9.69 inch 21 mm / 0.827 inch 2.1 kg4.53 lbs359.7 mm / 14.2 inch 248.8 mm / 9.8 inch 19.6 mm / 0.772 inch 2.1 kg4.54 lbs360 mm / 14.2 inch 249 mm / 9.8 inch 17.2 mm / 0.677 inch 1.9 kg4.17 lbs357.8 mm / 14.1 inch 235.35 mm / 9.27 inch 17.25 mm / 0.679 inch 1.9 kg4.11 lbs355.2 mm / 14 inch 238.4 mm / 9.39 inch 19.7 mm / 0.776 inch 2 kg4.41 lbs

Connectivity: No More Thunderbolt for the Lenovo Yoga C740-15IML

The HDMI port is no more and the proprietary slim-tip charging connector is gone as well. Instead, there is an additional USB Type-C port, which supports DisplayPort and Power Delivery. Interestingly, Lenovo has cut the Thunderbolt 3 functionality from the second available USB Type-C port. It looks as though Lenovo is trying to push buyers who need this feature towards the more expensive Lenovo Yoga C940-15IRH.

Right: 2x USB 3.0 Type-A
Right: 2x USB 3.0 Type-A
Left: 2x USB 3.1 Gen 1 Type-C, audio combo
Left: 2x USB 3.1 Gen 1 Type-C, audio combo

Communication

Intel's Wi-Fi card AX201 is relied upon for internet access. The latest-generation 2x2 Wi-Fi module supports the new Wi-Fi 6 standard, which results in far higher transfer rates in our benchmarks. Relative to the other devices in our comparison, the Wi-Fi speeds are more than twice as fast. We did not experience any issues with the wireless AX201 module during daily use.

Networking
iperf3 Client (receive) TCP 1 m 4M x10
Lenovo Yoga C740-15IML
Intel Wi-Fi 6 AX201
1420 MBit/s ∼100%
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
632 MBit/s ∼45% -55%
Lenovo Yoga 730-15IKB
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
616 MBit/s ∼43% -57%
Dell Inspiron 15 5579-9672
Qualcomm Atheros QCA61x4
612 MBit/s ∼43% -57%
Average of class Convertible
  (28.7 - 1470, n=181)
566 MBit/s ∼40% -60%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
461 MBit/s ∼32% -68%
iperf3 Client (transmit) TCP 1 m 4M x10
Lenovo Yoga C740-15IML
Intel Wi-Fi 6 AX201
1380 MBit/s ∼100%
HP Envy x360 15-bq102ng
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
676 MBit/s ∼49% -51%
Asus ZenBook Flip 15 UX561UD
Intel Dual Band Wireless-AC 8265
666 MBit/s ∼48% -52%
Dell Inspiron 15 5579-9672
Qualcomm Atheros QCA61x4
657 MBit/s ∼48% -52%
Lenovo Yoga 730-15IKB
Realtek RTL8822BE Wireless LAN 802.11ac PCIe Adapter
650 MBit/s ∼47% -53%
Average of class Convertible
  (36.4 - 1411, n=181)
561 MBit/s ∼41% -59%

Accessories

The 65-watt AC adapter has a USB Type-C port - a new addition compared to the preceding model, which came with a proprietary 90-watt AC adapter. The smaller AC adapter is about 100 grams lighter. Aside from the AC adapter, the Lenovo Yoga C740-15IML includes a stylus (which we will take a closer look at in the input devices section) and a 3-in-1 adapter. The hub is connected via USB Type-C and features VGA, HDMI and a USB Type-A port.

Maintenance

Nine Torx screws have to be loosened and numerous clips removed with a spudger tool before the bottom plate can be taken off. The clip in the center of the case is particularly hard to remove.

On the inside, users can upgrade the M.2-2280 SSD and swap the non-soldered Wi-Fi module. By contrast, the RAM is soldered onto the motherboard. Furthermore, the two fans can be cleaned and the battery is also user-replaceable.

View of the components
View of the components

Warranty

In the case of damage, users can file a warranty claim with the manufacturer for two years after purchase. Since the warranty package only includes a bring-in service, users will have to send in the Lenovo Yoga C740-15IML for repairs.

Input devices: Digitizer Pen Included

Keyboard

The large spaces to the right and left of the keyboards are now gone in favor of a numpad. As a result, the keyboard is no longer centered in the middle of the case. The choice between a keyboard with or without numpad is a matter of personal preference.

In terms of quality, the keyboard does not come close to the keyboards of Lenovo's ThinkPads. Here, the keys feel too soft and the actuation point is not as clearly defined. Consequentially, the keyboard is not exceptional, but to a certain extent it is still acceptable for typists. At least, the backlit keys offer decent key travel.

Keyboard area of the Lenovo Yoga C740-15IML
Keyboard area of the Lenovo Yoga C740-15IML

Touchpad

The touchpad dimensions are 10.5 x 7 centimeters. The glass surface gives it a premium feel and good gliding properties. The software solution of the ClickPad also leaves no room for complaints. It is an almost perfect mouse replacement that should satisfy even demanding users.

Touchscreen & Stylus

Since this is a convertible laptop, it of course has a touchscreen that works without any issues. The display is compatible with Wacom AES as well. The included Lenovo digitizer stylus is easy to handle. Thanks to its support for multiple different pressure levels, it allows for creating precise drawings and notes. The pen, which cannot be stored inside of the case, contains an AAA battery. The included USB mount can be used to attach the stylus to the laptop.

Mounted Lenovo digitizer pen
Mounted Lenovo digitizer pen
Digitizer stylus tests
Digitizer stylus tests

Display: The Biggest Weakness of the Lenovo Laptop

All models of the Lenovo Yoga C740-15IML are equipped with a glossy 15.6-inch Full HD (1920x1080) touchscreen. However, Lenovo has two different IPS LCD variants on offer: One Full HD display offers a maximum brightness level of 250 cd/m². At 500 cd/m², the other display option is twice as bright.

Unfortunately, the former is installed in our test device. For a laptop with a price in excess of $1,000, the average brightness of 268 cd/m² is very low. At this point we are uncertain as to why this dimly lit display is even an option.

Subpixel array Lenovo Yoga C740-15IML
Subpixel array Lenovo Yoga C740-15IML
Almost no backlight bleeding (enhanced in this picture)
Almost no backlight bleeding (enhanced in this picture)
283
cd/m²
280
cd/m²
278
cd/m²
267
cd/m²
286
cd/m²
251
cd/m²
258
cd/m²
276
cd/m²
237
cd/m²
Distribution of brightness
B156HAN02.5
X-Rite i1Pro 2
Maximum: 286 cd/m² Average: 268.4 cd/m² Minimum: 2.8 cd/m²
Brightness Distribution: 83 %
Center on Battery: 287 cd/m²
Contrast: 1430:1 (Black: 0.2 cd/m²)
ΔE Color 7.3 | 0.6-29.43 Ø5.7, calibrated: 5.1
ΔE Greyscale 7 | 0.64-98 Ø5.9
57.5% sRGB (Argyll 3D) 36.9% AdobeRGB 1998 (Argyll 3D)
Gamma: 2.35
Lenovo Yoga C740-15IML
B156HAN02.5, IPS LED, 1920x1080, 15.60
Lenovo Yoga 730-15IKB
BOE HF NV156QUM-N51, IPS, 3840x2160, 15.60
Dell Inspiron 15 5579-9672
AUO, B156HW01, IPS, 1920x1080, 15.60
Asus ZenBook Flip 15 UX561UD
B156ZAN03.1, IPS, 3840x2160, 15.60
HP Envy x360 15-bq102ng
Chi Mei CM15E9, IPS, 1920x1080, 15.60
Response Times
28%
15%
4%
21%
Response Time Grey 50% / Grey 80% *
50.8 (24, 26.8)
34 (16, 18)
33%
41 (19, 22)
19%
52 (25, 27)
-2%
40 (22, 18)
21%
Response Time Black / White *
32.4 (17.6, 14.8)
25 (14, 11)
23%
29 (17, 12)
10%
29 (15, 14)
10%
26 (14, 12)
20%
PWM Frequency
961 (90)
25000 (30)
Screen
16%
9%
40%
24%
Brightness middle
286
309
8%
251
-12%
380
33%
221
-23%
Brightness
268
299
12%
240
-10%
371
38%
207
-23%
Brightness Distribution
83
84
1%
84
1%
87
5%
87
5%
Black Level *
0.2
0.29
-45%
0.2
-0%
0.28
-40%
0.15
25%
Contrast
1430
1066
-25%
1255
-12%
1357
-5%
1473
3%
Colorchecker DeltaE2000 *
7.3
3.9
47%
5.25
28%
4.38
40%
4.35
40%
Colorchecker DeltaE2000 max. *
21.7
7.5
65%
10.04
54%
7.59
65%
8.98
59%
Colorchecker DeltaE2000 calibrated *
5.1
Greyscale DeltaE2000 *
7
4.58
35%
3.28
53%
3.6
49%
3.09
56%
Gamma
2.35 94%
2.43 91%
2.15 102%
2.32 95%
2.23 99%
CCT
5847 111%
7344 89%
6502 100%
6860 95%
6068 107%
Color Space (Percent of AdobeRGB 1998)
36.9
39
6%
35
-5%
88
138%
56
52%
Color Space (Percent of sRGB)
57.5
90
57%
55
-4%
100
74%
86
50%
Total Average (Program / Settings)
22% / 18%
12% / 10%
22% / 34%
23% / 24%

* ... smaller is better

Color accuracy
Color accuracy
Grayscale
Grayscale
Saturation
Saturation
Color accuracy (calibrated)
Color accuracy (calibrated)
Grayscale (calibrated)
Grayscale (calibrated)
Saturation (calibrated)
Saturation (calibrated)

There is a slight yellow tint ex-factory. While this can be remedied with calibration (performed in this case with the professional CalMAN software and the X-Rite i1 Pro 2 spectrophotometer), there are some deviations in terms of saturation even after our calibration. Positive: The contrast ratio of the screen is excellent, resulting in vivid colors.

The color-space coverage is extremely poor and even the small sRGB color space is only covered by 57.5%. The display is not suitable for image-editing.

sRGB: 57.5%
sRGB: 57.5%
AdobeRGB: 36.9%
AdobeRGB: 36.9%
Outdoors (shade)
Outdoors (shade)

Although the display appears to have been fitted with an anti-reflection layer, the surface is still glossy. The brightness level is insufficient for outdoor use, which manifests in poor readability even in the shade.

Display Response Times

Display response times show how fast the screen is able to change from one color to the next. Slow response times can lead to afterimages and can cause moving objects to appear blurry (ghosting). Gamers of fast-paced 3D titles should pay special attention to fast response times.
       Response Time Black to White
32.4 ms ... rise ↗ and fall ↘ combined↗ 17.6 ms rise
↘ 14.8 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 240 (maximum) ms. » 84 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (24.3 ms).
       Response Time 50% Grey to 80% Grey
50.8 ms ... rise ↗ and fall ↘ combined↗ 24 ms rise
↘ 26.8 ms fall
The screen shows slow response rates in our tests and will be unsatisfactory for gamers.
In comparison, all tested devices range from 0.8 (minimum) to 636 (maximum) ms. » 84 % of all devices are better.
This means that the measured response time is worse than the average of all tested devices (38.6 ms).

Screen Flickering / PWM (Pulse-Width Modulation)

To dim the screen, some notebooks will simply cycle the backlight on and off in rapid succession - a method called Pulse Width Modulation (PWM) . This cycling frequency should ideally be undetectable to the human eye. If said frequency is too low, users with sensitive eyes may experience strain or headaches or even notice the flickering altogether.
Screen flickering / PWM not detected

In comparison: 51 % of all tested devices do not use PWM to dim the display. If PWM was detected, an average of 9581 (minimum: 5 - maximum: 142900) Hz was measured.

As per usual, the IPS viewing angles leave no room for complaints.

Lenovo C740-15IML viewing angles
Lenovo C740-15IML viewing angles

Performance: Yoga Laptop C740-15IML is Slower than the Older Model

Lenovo offers three different Intel Core CPU options: The quad-core CPUs i5-10210U and i7-10510U and the hexa-core processor i7-10710U. All three options come with the same Intel UHD Graphics 620 and Lenovo does not offer any other GPU options. In terms of RAM, users can choose between 8, 12 and 16 GB of soldered DDR4-2666 memory. The storage solution consists of an M.2-2280 SSD with a capacity of up to 1 TB.

Note: Lenovo's "intelligent cooling" is enabled by default. The following benchmarks were performed with "intelligent cooling" disabled and the Windows power profile "high performance" selected.

CPU-Z
CPU-Z
CPU-Z Caches
CPU-Z Caches
CPU-Z Mainboard
CPU-Z Mainboard
HWiNFO
HWiNFO
GPU-Z
GPU-Z
LatencyMon
LatencyMon

Processor

The Core i7-10510U is a new Ultra Low Voltage (ULV) processor from Intel. In this case, ULV refers to the processor's typical TDP of 15 watts. The four cores of this processor have clock rates ranging from 1.8 to 4.8 GHz. In our CPU comparison list, the CPU's performance can be compared to those of competing processors.

The processor is able to exceed its TDP limit by a fair amount, at which point it can consume up to 43 watts, which translates into a clock speed of 4.1 GHz. Over the course of our Cinebench test, the consumption drops to 23 watts and the clock speed to 3 GHz. During the Cinebench loop, the consumption drops to about 16.5 watts and the clock rate to around 2.6 GHz after a few loops. Here, the temperatures stabilize at approximately 75 °C with an initial peak of 97 °C.

Although the Lenovo Yoga C740-15IML is faster than its competitors (which, to be fair, were all released last year) in terms of CPU performance, its own predecessor, the Lenovo Yoga 730-15IKB, appears to benefit from a more potent cooling solution that results in higher CPU performance under continuous load. In this regard, the latest model is a clear downgrade. If more CPU performance is desired, the Yoga C940-15IRH is likely a better choice.

The performance is not limited in battery mode.

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Lenovo Yoga C740-15IML Intel Core i7-10510U, Intel Core i7-10510U: Ø604 (560-752)
Lenovo Yoga 730-15IKB Intel Core i7-8550U, Intel Core i7-8550U: Ø672 (652.93-722.79)
Dell Inspiron 15 5579-9672 Intel Core i5-8250U, Intel Core i5-8250U: Ø503 (479.16-561.5)
Asus ZenBook Flip 15 UX561UD Intel Core i7-8550U, Intel Core i7-8550U: Ø581 (569.97-761.01)
HP Envy x360 15-bq102ng AMD Ryzen 5 2500U, AMD Ryzen 5 2500U: Ø561 (552.26-618.11)
Cinebench R15
CPU Single 64Bit
Lenovo Yoga C740-15IML
Intel Core i7-10510U
195 Points ∼100%
Lenovo Yoga C940-15IRH
Intel Core i7-9750H
184 Points ∼94% -6%
Average Intel Core i7-10510U
  (113 - 202, n=38)
178 Points ∼91% -9%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
171 Points ∼88% -12%
Lenovo Yoga 730-15IKB
Intel Core i7-8550U
168 Points ∼86% -14%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
142 Points ∼73% -27%
Dell Inspiron 15 5579-9672
Intel Core i5-8250U
140 Points ∼72% -28%
Average of class Convertible
  (19 - 213, n=345)
112 Points ∼57% -43%
CPU Multi 64Bit
Lenovo Yoga C940-15IRH
Intel Core i7-9750H
1231 Points ∼100% +63%
Asus ZenBook Flip 15 UX561UD
Intel Core i7-8550U
761 Points ∼62% +1%
Lenovo Yoga C740-15IML
Intel Core i7-10510U
756 (560min - 756max) Points ∼61%
Lenovo Yoga 730-15IKB
Intel Core i7-8550U
723 Points ∼59% -4%
Average Intel Core i7-10510U
  (482 - 856, n=41)
664 Points ∼54% -12%
HP Envy x360 15-bq102ng
AMD Ryzen 5 2500U
618 Points ∼50% -18%
Dell Inspiron 15 5579-9672
Intel Core i5-8250U
562 Points ∼46% -26%
Average of class Convertible
  (33 - 1049, n=356)
346 Points ∼28% -54%
Cinebench R15 CPU Multi 64Bit
756 Points
Cinebench R15 OpenGL 64Bit
61 fps
Cinebench R15 Ref. Match 64Bit
98 %
Cinebench R15 CPU Single 64Bit
195 Points
Help

System Performance

The Lenovo Yoga C740-15IML claims a large lead in almost all of the PCMark tests and there are no weaknesses in terms of system performance otherwise, either.

PCMark 10
Digital Content Creation
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4146 Points ∼100% +18%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4042 Points ∼97% +15%
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
3522 Points ∼85%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (2465 - 4741, n=16)
3239 Points ∼78% -8%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
2848 Points ∼69% -19%
Average of class Convertible
  (605 - 5161, n=137)
2689 Points ∼65% -24%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
2656 Points ∼64% -25%
Productivity
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
7254 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (6554 - 8036, n=16)
7243 Points ∼100% 0%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
6678 Points ∼92% -8%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
6024 Points ∼83% -17%
Average of class Convertible
  (1121 - 7945, n=139)
5520 Points ∼76% -24%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
4811 Points ∼66% -34%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3901 Points ∼54% -46%
Essentials
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
10546 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (8020 - 10546, n=16)
9266 Points ∼88% -12%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
8388 Points ∼80% -20%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
8258 Points ∼78% -22%
Average of class Convertible
  (2489 - 10546, n=139)
7341 Points ∼70% -30%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
6349 Points ∼60% -40%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
6236 Points ∼59% -41%
Score
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
4630 Points ∼100%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4347 Points ∼94% -6%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3783 - 4688, n=16)
4299 Points ∼93% -7%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4249 Points ∼92% -8%
Average of class Convertible
  (872 - 5214, n=140)
3379 Points ∼73% -27%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
2944 Points ∼64% -36%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
2208 Points ∼48% -52%
PCMark 8
Work Score Accelerated v2
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
5366 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3734 - 5366, n=13)
4987 Points ∼93% -7%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
4556 Points ∼85% -15%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
4401 Points ∼82% -18%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
4382 Points ∼82% -18%
Average of class Convertible
  (1007 - 5366, n=261)
3825 Points ∼71% -29%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3800 Points ∼71% -29%
Home Score Accelerated v2
Lenovo Yoga C740-15IML
UHD Graphics 620, i7-10510U, Samsung SSD PM981 MZVLB512HAJQ
3935 Points ∼100%
Average Intel Core i7-10510U, Intel UHD Graphics 620
  (3157 - 4251, n=13)
3635 Points ∼92% -8%
Asus ZenBook Flip 15 UX561UD
GeForce GTX 1050 Mobile, i5-8550U, Micron 1100 MTFDDAV256TBN
3614 Points ∼92% -8%
Lenovo Yoga 730-15IKB
GeForce GTX 1050 Mobile, i5-8550U, SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
3505 Points ∼89% -11%
HP Envy x360 15-bq102ng
Vega 8, R5 2500U, Samsung PM961 MZVLW256HEHP
3462 Points ∼88% -12%
Dell Inspiron 15 5579-9672
UHD Graphics 620, i5-8250U, SK hynix SC311 SATA
3370 Points ∼86% -14%
Average of class Convertible
  (741 - 4741, n=311)
2878 Points ∼73% -27%
PCMark 8 Home Score Accelerated v2
3935 points
PCMark 8 Work Score Accelerated v2
5366 points
PCMark 10 Score
4630 points
Help

Storage Solution

The single M.2-2280 SSD has a capacity of 512 GB. In the case of our test model, it was manufactured by Samsung. The PM981 is a high-performance PCIe-NVMe SSD that pulls far ahead of all other SSDs in our comparison.

Lenovo Yoga C740-15IML
Samsung SSD PM981 MZVLB512HAJQ
Lenovo Yoga 730-15IKB
SK Hynix PC401 512GB M.2 (HFS512GD9TNG)
Dell Inspiron 15 5579-9672
SK hynix SC311 SATA
Asus ZenBook Flip 15 UX561UD
Micron 1100 MTFDDAV256TBN
HP Envy x360 15-bq102ng
Samsung PM961 MZVLW256HEHP
Average Samsung SSD PM981 MZVLB512HAJQ
 
CrystalDiskMark 5.2 / 6
-10%
-70%
-61%
-29%
-16%
Write 4K
142.3
164.9
16%
48.25
-66%
112.6
-21%
116
-18%
127 (90.4 - 176, n=64)
-11%
Read 4K
47.56
50.49
6%
23.77
-50%
29.67
-38%
42.73
-10%
44 (28 - 61.3, n=63)
-7%
Write Seq
2185
1262
-42%
444.9
-80%
432.1
-80%
1222
-44%
1617 (112 - 2730, n=62)
-26%
Read Seq
2235
2054
-8%
497.5
-78%
479.9
-79%
1608
-28%
1716 (501 - 2665, n=62)
-23%
Write 4K Q32T1
515.4
477.6
-7%
223.5
-57%
191
-63%
280.1
-46%
413 (198 - 1707, n=64)
-20%
Read 4K Q32T1
413.4
549.7
33%
171.8
-58%
246.5
-40%
333.6
-19%
420 (230 - 1015, n=64)
2%
Write Seq Q32T1
2981
1400
-53%
510.9
-83%
450.3
-85%
1291
-57%
2076 (1714 - 2994, n=64)
-30%
Read Seq Q32T1
3565
2672
-25%
552.8
-84%
522.4
-85%
3183
-11%
3130 (1772 - 3565, n=64)
-12%
Samsung SSD PM981 MZVLB512HAJQ
Sequential Read: 2499 MB/s
Sequential Write: 2196 MB/s
512K Read: 1779 MB/s
512K Write: 1735 MB/s
4K Read: 65.23 MB/s
4K Write: 143.7 MB/s
4K QD32 Read: 401.1 MB/s
4K QD32 Write: 471.4 MB/s

GPU Performance

The Intel UHD Graphics 620 is the sole graphics chip of the Lenovo Yoga C740-15IML. Unlike its predecessor Lenovo Yoga 730-15IKB, the device does not include a dedicated GPU (dGPU).

Thus, the GPU performance of the Yoga C740-15IML is far behind that of the older model. While the integrated Intel GPU is able to fully exhaust its capabilities thanks to dual-channel RAM, its potential is still very limited.

3DMark 11 - 1280x720 Performance GPU
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
7339 Points ∼100% +267%
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
6935 Points ∼94% +247%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
3549 Points ∼48% +78%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
1999 Points ∼27%
Average Intel UHD Graphics 620
  (1235 - 2006, n=231)
1744 Points ∼24% -13%
Average of class Convertible
  (173 - 17421, n=369)
1537 Points ∼21% -23%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
1529 Points ∼21% -24%
3DMark
2560x1440 Time Spy Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
1416 Points ∼100% +227%
Average of class Convertible
  (85 - 5126, n=65)
652 Points ∼46% +51%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
649 Points ∼46% +50%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
433 Points ∼31%
Average Intel UHD Graphics 620
  (299 - 443, n=77)
378 Points ∼27% -13%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
317 Points ∼22% -27%
1920x1080 Fire Strike Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
5965 Points ∼100% +336%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
5329 Points ∼89% +289%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
2310 Points ∼39% +69%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
1369 Points ∼23%
Average of class Convertible
  (132 - 13158, n=275)
1232 Points ∼21% -10%
Average Intel UHD Graphics 620
  (557 - 1420, n=199)
1152 Points ∼19% -16%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
997 Points ∼17% -27%
1280x720 Cloud Gate Standard Graphics
Lenovo Yoga 730-15IKB
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
26144 Points ∼100% +139%
Asus ZenBook Flip 15 UX561UD
NVIDIA GeForce GTX 1050 Mobile, Intel Core i7-8550U
16381 Points ∼63% +50%
HP Envy x360 15-bq102ng
AMD Radeon RX Vega 8 (Ryzen 2000/3000), AMD Ryzen 5 2500U
15186 Points ∼58% +39%
Lenovo Yoga C740-15IML
Intel UHD Graphics 620, Intel Core i7-10510U
10927 Points ∼42%
Average Intel UHD Graphics 620
  (6910 - 11436, n=212)
9229 Points ∼35% -16%
Dell Inspiron 15 5579-9672
Intel UHD Graphics 620, Intel Core i5-8250U
8112 Points ∼31% -26%
Average of class Convertible
  (1023 - 38419, n=321)
7611 Points ∼29% -30%
3DMark 11 Performance
2275 points
3DMark Cloud Gate Standard Score
9909 points
3DMark Fire Strike Score
1249 points
3DMark Time Spy Score
497 points
Help

Gaming Performance

The lack of a dGPU makes the Lenovo Yoga C740-15IML a poor choice for games. Users who wish to play demanding games would be better served by a laptop with a dGPU.

low med. high ultra
BioShock Infinite (2013) 84.9 42.5 35.2 11.4 fps
Dota 2 Reborn (2015) 90 56.5 23.2 20.5 fps
Rise of the Tomb Raider (2016) 24.6 14.8 fps
X-Plane 11.11 (2018) 27.7 17.8 15.7 fps
Total War: Three Kingdoms (2019) 30.5 7.9 fps

Emissions: Lenovo Yoga with Good Speakers & Low Heat/Noise Levels

System Noise

With a maximum 33.3 dB(A), the fans remain quieter than those of the older Lenovo Yoga 730-15IKB due to the lack of a dGPU. During idle, the fans remain inactive for the most part. At 29.6 dB(A), they are still very quiet when they do spin-up.

We did not observe coil whine on this laptop.

Noise Level

Idle
29.3 / 29.3 / 29.6 dB(A)
Load
32.4 / 33.3 dB(A)
  red to green bar
 
 
30 dB
silent
40 dB(A)
audible
50 dB(A)
loud
 
min: dark, med: mid, max: light   Audix TM1, Arta (15 cm distance)   environment noise: 29.3 dB(A)
dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.833.832.3312531.627.727.92931323030.128.54029.329.229.929.25026.926.827.126.96325.423.225.826.98024.923.82424.810026.22524.52512523.62424.423.816023.924.824.22520023.323.823.523.525023.623.323.423.631523.121.922.222.240022.321.820.121.450022.922.720.122.163022.12219.121.38002121.118.419.9100021.621.81820.1125022.622.217.620.7160023.222.516.921200022.32216.719.4250021.821.215.619.1315021.220.815.418.7400020.42015.217.9500019.519.215.217.7630019.518.615.316.4800017.31715.415.91000015.915.815.315.41250015.115.315.115.11600014.914.814.814.8SPL33.33329.331.5N1.91.81.21.6median 22.1median 21.8median 17.6median 20.1Delta1.91.73.72.234.234.533.732.234.234.23434.132.934.234.433.232.832.634.432.432.331.232.432.429.429.130.129.129.428.528.128.428.128.527.427.325.727.227.425.426.325.926.325.425.525.725.725.225.524.624.925.123.224.623.724.324.423.523.722.524.324.221.622.523.125.425.521.823.121.624.625.820.221.621.125.124.619.421.119.824.324.21919.819.824.724.718.319.820.929.129.217.820.919.326.426.917.719.319.426.727.317.419.419.525.826.217.519.519.826.526.917.719.818.128.92817.818.118.221.621.91818.218.521.321.518.218.518.519.619.718.418.518.719.319.318.718.719.119.219.118.919.119.219.219.319.119.219.519.619.619.519.531.637.537.530.531.61.52.52.51.31.5median 19.8median 24.7median 24.7median 18.9median 19.81.82.42.21.81.8hearing rangehide median Fan NoiseLenovo Yoga C740-15IMLLenovo Yoga 730-15IKB

Temperature

Stress test (Prime95 + FurMark)
Stress test (Prime95 + FurMark)

The surface temperatures of the Lenovo Yoga C740-14IML barely increase at all. The peak value of 42.3 °C on the bottom is not in any way problematic.

Over the course of the Prime95 and FurMark stress tests, the combined CPU/GPU consumption drops to only 14 watts. As a result, the CPU clock decreases to only 900 MHz. This TDP throttling does not impact day-to-day use, however.

Max. Load
 38.2 °C
101 F
40.1 °C
104 F
39.3 °C
103 F
 
 35 °C
95 F
33.4 °C
92 F
27.4 °C
81 F
 
 25.3 °C
78 F
25.4 °C
78 F
24.6 °C
76 F
 
Maximum: 40.1 °C = 104 F
Average: 32.1 °C = 90 F
38 °C
100 F
42.3 °C
108 F
40.1 °C
104 F
27.2 °C
81 F
34.6 °C
94 F
34.1 °C
93 F
25.4 °C
78 F
27.6 °C
82 F
27.6 °C
82 F
Maximum: 42.3 °C = 108 F
Average: 33 °C = 91 F
Power Supply (max.)  36 °C = 97 F | Room Temperature 20.1 °C = 68 F | Voltcraft IR-900
(±) The average temperature for the upper side under maximal load is 32.1 °C / 90 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 40.1 °C / 104 F, compared to the average of 35.3 °C / 96 F, ranging from 21.8 to 55.7 °C for the class Convertible.
(±) The bottom heats up to a maximum of 42.3 °C / 108 F, compared to the average of 36.5 °C / 98 F
(+) In idle usage, the average temperature for the upper side is 22.2 °C / 72 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 25.4 °C / 77.7 F and are therefore cool to the touch.
(+) The average temperature of the palmrest area of similar devices was 28.8 °C / 83.8 F (+3.4 °C / 6.1 F).
Load (top)
Load (top)
Load (bottom)
Load (bottom)

Speakers

The two speakers on the bottom are Dolby-Atmos certified. For a laptop, they sound relatively good and there is even a hint of bass. Alternatively, headphones can be used. The combined audio jack outputs sound flawlessly.

dB(A) 0102030405060708090Deep BassMiddle BassHigh BassLower RangeMidsHigher MidsLower HighsMid HighsUpper HighsSuper Highs2032.330.52527.928.83130.127.14029.928.95027.123.86325.825.7802428.510024.532.512524.438.916024.24620023.549.925023.450.931522.253.940020.158.850020.161.563019.165.480018.46710001864.4125017.664160016.962.6200016.760.5250015.655.8315015.457.2400015.261.9500015.255.3630015.352.3800015.455.81000015.351.81250015.146.91600014.838.8SPL29.373.3N1.231.6median 17.6median 55.8Delta3.77.234.132.234.133.732.933.732.232.632.230.132.430.130.729.130.728.728.128.727.527.227.530.326.330.341.625.241.650.923.250.952.323.552.352.421.652.461.421.861.468.520.268.565.219.465.266196671.918.371.970.317.870.36717.76769.817.469.873.317.573.365.617.765.663.817.863.859.41859.459.618.259.660.318.460.36518.76565.318.965.363.519.163.566.819.566.879.730.579.743.21.343.2median 65median 18.9median 655.81.85.8hearing rangehide median Pink NoiseLenovo Yoga C740-15IMLLenovo Yoga 730-15IKB
Frequency diagram (checkboxes can be checked and unchecked to compare devices)
Lenovo Yoga C740-15IML audio analysis

(±) | speaker loudness is average but good (73.3 dB)
Bass 100 - 315 Hz
(±) | reduced bass - on average 10.4% lower than median
(±) | linearity of bass is average (11.1% delta to prev. frequency)
Mids 400 - 2000 Hz
(±) | higher mids - on average 7.2% higher than median
(+) | mids are linear (6.4% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.2% away from median
(±) | linearity of highs is average (10.5% delta to prev. frequency)
Overall 100 - 16.000 Hz
(±) | linearity of overall sound is average (18.4% difference to median)
Compared to same class
» 33% of all tested devices in this class were better, 8% similar, 59% worse
» The best had a delta of 10%, average was 22%, worst was 53%
Compared to all devices tested
» 34% of all tested devices were better, 7% similar, 60% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Lenovo Yoga 730-15IKB audio analysis

(±) | speaker loudness is average but good (73.34 dB)
Bass 100 - 315 Hz
(-) | nearly no bass - on average 16.9% lower than median
(±) | linearity of bass is average (12.2% delta to prev. frequency)
Mids 400 - 2000 Hz
(+) | balanced mids - only 4% away from median
(±) | linearity of mids is average (7.7% delta to prev. frequency)
Highs 2 - 16 kHz
(+) | balanced highs - only 2.6% away from median
(+) | highs are linear (6.1% delta to prev. frequency)
Overall 100 - 16.000 Hz
(+) | overall sound is linear (14.5% difference to median)
Compared to same class
» 10% of all tested devices in this class were better, 4% similar, 86% worse
» The best had a delta of 10%, average was 22%, worst was 53%
Compared to all devices tested
» 13% of all tested devices were better, 4% similar, 83% worse
» The best had a delta of 3%, average was 21%, worst was 65%

Energy Management: Lenovo Yoga C740-15IML Lasts Longer than its Predecessor

Energy Consumption

Particularly while idling on the most economical settings, the energy consumption of the Lenovo Yoga C740-15IML is very low. Under load, we recorded a peak consumption value of 64.7 watts, which fits perfectly into the 65-watt rating of the AC adapter.

Power Consumption
Off / Standbydarklight 0.4 / 0.68 Watt
Idledarkmidlight 2.97 / 7.2 / 9.9 Watt
Load midlight 40.8 / 64.7 Watt
 color bar
Key: min: dark, med: mid, max: light        Metrahit Energy
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620, Samsung SSD PM981 MZVLB512HAJQ, IPS LED, 1920x1080, 15.60
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile, SK Hynix PC401 512GB M.2 (HFS512GD9TNG), IPS, 3840x2160, 15.60
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q, Intel Optane Memory H10 with Solid State Storage 32GB + 512GB HBRPEKNX0202A(L/H), IPS, 1920x1080, 15.60
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620, SK hynix SC311 SATA, IPS, 1920x1080, 15.60
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile, Micron 1100 MTFDDAV256TBN, IPS, 3840x2160, 15.60
HP Envy x360 15-bq102ng
R5 2500U, Vega 8, Samsung PM961 MZVLW256HEHP, IPS, 1920x1080, 15.60
Average Intel UHD Graphics 620
 
Average of class Convertible
 
Power Consumption
-33%
-99%
12%
-76%
-5%
6%
6%
Idle Minimum *
2.97
4.8
-62%
5.2
-75%
3.9
-31%
5.4
-82%
4.8
-62%
3.79 (1 - 12.4, n=244)
-28%
4.55 (1 - 23, n=419)
-53%
Idle Average *
7.2
10.1
-40%
10.7
-49%
6.6
8%
10.8
-50%
7
3%
6.95 (2.8 - 15.7, n=246)
3%
7.7 (1.3 - 32.3, n=419)
-7%
Idle Maximum *
9.9
10.7
-8%
24.3
-145%
9.3
6%
13.9
-40%
9.5
4%
8.71 (3.8 - 16.6, n=244)
12%
9.22 (1.8 - 61, n=419)
7%
Load Average *
40.8
44
-8%
84.4
-107%
30.2
26%
94
-130%
40.8
-0%
35.1 (8.1 - 51.6, n=244)
14%
27.4 (1.4 - 94, n=417)
33%
Load Maximum *
64.7
94.7
-46%
142.8
-121%
33.2
49%
116.6
-80%
44.3
32%
47.3 (22 - 96.3, n=246)
27%
33.7 (6.8 - 118, n=418)
48%
Witcher 3 ultra *
83.9

* ... smaller is better

Battery Life

Recharging time: 153 minutes
Recharging time: 153 minutes

The battery has grown from 51.5 to 60.3 watt hours compared to the preceding model. Combined with the lower energy consumption, this results in significantly better battery life. In our Wi-Fi test, which is performed at 150 cd/m² LCD brightness, the Yoga C740-15IML achieves a runtime of almost 12 hours. When performing this test at maximum brightness, it still lasts more than eight hours. The Yoga 730-15IKB only reaches a good seven hours in our Wi-Fi test (150 cd/m²). Similarly, the Lenovo Yoga C940-15IRH's battery life is not quite as good despite the larger 69-watt hour battery.

Battery Runtime
NBC WiFi Websurfing Battery Test 1.3 (Edge)
10h 22min
NBC WiFi Websurfing Battery Test 1.3 max Brightness (Edge)
8h 15min
Big Buck Bunny H.264 1080p
11h 55min
Load (maximum brightness)
2h 00min
Lenovo Yoga C740-15IML
i7-10510U, UHD Graphics 620, 60.3 Wh
Lenovo Yoga 730-15IKB
i5-8550U, GeForce GTX 1050 Mobile, 51.5 Wh
Lenovo Yoga C940-15IRH
i7-9750H, GeForce GTX 1650 Max-Q, 69 Wh
Dell Inspiron 15 5579-9672
i5-8250U, UHD Graphics 620, 42 Wh
Asus ZenBook Flip 15 UX561UD
i5-8550U, GeForce GTX 1050 Mobile, 52 Wh
HP Envy x360 15-bq102ng
R5 2500U, Vega 8, 55.8 Wh
Average of class Convertible
 
Battery Runtime
-51%
-29%
-27%
-48%
-32%
-13%
Reader / Idle
697
1092
671
558
809 (117 - 2892, n=310)
H.264
715
324
-55%
401
-44%
261
-63%
464 (206 - 1070, n=128)
-35%
WiFi v1.3
622
370
-41%
583
-6%
435
-30%
311
-50%
426
-32%
470 (153 - 1141, n=294)
-24%
Load
120
50
-58%
59
-51%
110
-8%
84
-30%
145 (49 - 677, n=311)
21%

Pros

+ robust, high-quality aluminum chassis
+ digitizer pen included
+ very low noise/heat development
+ good speakers
+ excellent battery life

Cons

- weaker performance than its predecessor
- no Thunderbolt 3
- 4K UHD option has been cut
- dimly lit Full HD LCD with poor color accuracy

Verdict

In review: Lenovo Yoga C740-15IML. Courtesy of
In review: Lenovo Yoga C740-15IML. Courtesy of

The transformation from the Yoga 720-15IKB to the Yoga 730-15IKB and finally, the latest Yoga C740-15IML is remarkable: From a high-performance convertible with an Nvidia GeForce GTX GPU (and a 45-watt processor in the case of the Yoga 720) to an ultrabook convertible with a ULV CPU and no dGPU at all. Evidently, the initial role of this series has been assumed by the new and more expensive Lenovo Yoga C940-15IRH.

What is left is a good convertible in a premium aluminum chassis with a digitizer pen and very small noise and heat development as well as good battery life. However, the Yoga C740-15IML is weaker than its predecessor in terms of performance due to the lack of a dGPU and the inferior cooling solution. The loss of the Thunderbolt 3 port is painful and there is no 4K UHD option anymore.

Performance downgrade: The Yoga C740-15IML is a different convertible compared to its two predecessors. While this is not necessarily all bad, buyers should definitely steer clear of our configuration's dim Full HD display. Fortunately, there is a brighter LCD option.

We could definitely recommend the Lenovo Yoga C740-15IML to users looking for a low-powered 15.6-inch convertible - if it weren't for the display's far too low brightness level. Due to this, we strongly advise against this specific model. Instead, buyers of the Yoga C740-15IML should choose the Full HD version with 500 cd/m². While we were not yet able to ascertain its qualities, they can hardly be worse than those of the panel in this test device.

Lenovo Yoga C740-15IML - 01/04/2020 v7
Benjamin Herzig

Chassis
87 / 98 → 89%
Keyboard
79%
Pointing Device
85%
Connectivity
62 / 75 → 83%
Weight
65 / 20-75 → 81%
Battery
88%
Display
77%
Games Performance
52 / 78 → 67%
Application Performance
83 / 85 → 98%
Temperature
93%
Noise
97%
Audio
65 / 91 → 72%
Camera
34 / 85 → 40%
Average
75%
85%
Convertible - Weighted Average

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> Notebook / Laptop Reviews and News > Reviews > Lenovo Yoga C740-15IML Laptop Review: Strong Battery Life, Weak Display
Benjamin Herzig, 2020-01- 7 (Update: 2020-01- 9)
Benjamin Herzig
Editor of the original article: Benjamin Herzig - Editor
In 2010 I started to get more and more involved with technology, especially notebooks have been my passion ever since. Of course I came across the detailed tests of Notebookcheck very quickly. With time I learned more and more about notebooks and started writing small reviews about notebooks in forums and blog pages. To earn some extra money during my studies I turned my hobby into my profession and joined the team of Notebookcheck in 2016. My personal interest is especially in business notebooks.