Review: Lenovo’s Yoga C740 15 offers display upgrade, full keyboard

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Lenovo Yoga C740 15

Source: Windows Central

I recently reviewed Lenovo’s 14-inch Yoga C740, a mid-range convertible alternative to the high-end Yoga C940. In my review, I noted its solid aluminum design, robust audio from top-firing speakers, and excellent performance from the 10th Gen Intel Core “Comet Lake” processor (CPU). Following the review, I got my hands on the larger 15.6-inch Yoga C740 sibling that shares a lot of traits with the smaller version. It’s not just a larger version of the same laptop, however, and there are some things you should know.

15-Inch Convertible

Lenovo Yoga C740 15

Bigger screen, more keyboard

Bottom line: The 15-inch Yoga C740 is right for anyone who absolutely needs the extra screen space and HDR support, though the 14-inch Yoga C740 is no doubt going to be better for most people.

Lenovo Yoga C740 15 at a glance

Lenovo Yoga C740 15

Source: Windows Central

Lenovo supplied Windows Central with a review unit of the 15-inch Yoga C740 complete with 10th Gen Intel Core i7-10510U CPU, 12GB of DDR4 RAM soldered to the board and a 512GB M.2 PCIe solid-state drive (SSD) with integrated 32GB Intel Optane memory. It has an upgraded touch display with FHD resolution, 500 nits brightness, and Dolby Vision HDR400. This exact configuration costs about $970 from Lenovo. That’s about as premium as this laptop gets, unless you add up to 16GB of RAM, a 1TB SSD, and an active pen.

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To compare prices, a 14-inch Yoga C740 with the same CPU, SSD, and RAM — though with an FHD touch display that tops out at 300 nits — costs about $920 from Lenovo. It’s not a huge price difference, but it is something, especially when we begin to look at what’s on offer with the 15-inch option.

Here’s a detailed breakdown of the specs found inside the 14- and 15-inch Yoga C740 review units.

Category Yoga C740 14 Yoga C740 15
OS Windows 10 Home Windows 10 Home
Processor 10th Gen “Comet Lake”
Intel Core i5-10210U
1.60GHz Base
4.20GHz Max
Four cores
10th Gen “Comet Lake”
Intel Core i7-10510U
1.80GHz Base
4.90GHz Max
Four cores
RAM 8GB DDR4-2666MHz
Soldered
12GB DDR4-2666MHz
Soldered
Graphics Integrated
Intel UHD Graphics
Integrated
Intel UHD Graphics
Storage 512GB M.2 PCIe SSD
Upgradeable
512GB M.2 PCIe SSD
Upgradeable
Display 14 inches
1920×1080 (FHD)
Touch
IPS, glossy
Dolby Vision
15.6 inches
1920×1080 (FHD)
Touch
IPS, glossy
Dolby Vision HDR400
Ports Two USB-C 3.1
USB-A 3.1
3.5mm audio
Two USB-C 3.1
Two USB-A 3.1
3.5mm audio
Audio Top-firing
Dual 2W speakers
Dolby Atmos
Bottom-firing
Dual 2W speakers
Dolby Atmos
Wireless Intel Wireless AC 9560
802.11ac (2×2)
Bluetooth 5.0
Intel Wireless AC 9560
802.11ac (2×2)
Bluetooth 5.0
Camera Front-facing 720p Front-facing 720p
Security Fingerprint reader
Webcam shutter
Fingerprint reader
Webcam shutter
Battery 51Wh
65W AC adapter
60Wh
65W AC adapter
Dimensions 12.67 x 8.45 x 0.59 – 0.67 inches
321.8mm x 214.6mm x 14.9 – 16.9mm)
14 x 9.27 x 0.63 inches
(357.8mm x 235.35mm x 16.02mm)
Weight From 3.09 pounds (1.4kg) From 4.19 pounds (1.9kg)

Comparing Lenovo’s Yoga C740 14 and C740 15

The 14- and 15-inch Yoga C740s share the same solid aluminum chassis with firm dual-hinge design. They’re nearly physically identical on the outside save for the size and port placement. The C740 15 weighs more than a pound over what the 14-inch model weighs; starting at 4.19 pounds (1.96kg), it’s not the better choice for anyone who wants to take their laptop everywhere. This is a convertible, so there’s also the matter of using it as a tablet. Weight and size make it a bit unwieldy, but it excels in stand mode.

The left side of the Yoga C740 15 has two USB-C ports (one used for charging) and a 3.5mm audio jack. On the right side are two USB-A ports, one more than the 14-inch Yoga C740 offers. That’s especially welcome if you hate using a docking station and want to connect multiple accessories. However, both laptops will work with a powerful dock that relies on USB-C connectivity.

Opening the lid, you’re treated to a full-size keyboard with number pad, sizeable Precision touchpad, and a fingerprint reader for Windows Hello. The touchpad is the same size as on the 14-inch model, so it doesn’t seem as large, but its glass surface still tracks perfectly. The fingerprint reader is well out of the way, meaning you won’t feel it rubbing under your palm while typing. For some added privacy, there is a shutter for the 720p front-facing camera above the display.

With a full keyboard and larger HDR display, the Yoga C740 15 makes for easy productivity work.

Other than the number pad, which isn’t present on the 14-inch Yoga C740, the 15-inch model’s keyboard has some different sized keys. Tab, CapsLk, Shift, and Ctrl on the left side have all been shrunk down, as well as the Backspace key. You will get used to it, and the number pad is undoubtedly a boon for productivity, but I prefer the C740 14’s key sizing.

To make room for the number pad on the 15-inch model, the speakers have been relegated to the bottom of the chassis. You still get Dolby Atmos for a nice boost, and the sound is full and loud, but the top-firing speakers along the side of the keyboard on the 14-inch model do a far better job in notebook mode. Using the Yoga C740 15 in stand mode (where the bottom of the laptop is facing up), however, doesn’t result in the same muffled audio as you get on the C740 14.

Lenovo Yoga C740 15

Source: Windows Central

The 15.6-inch FHD display is available in either anti-glare IPS with 250 nits brightness or IPS glossy with 500 nits brightness and Dolby Vision HDR400. The review unit has the latter display (which tacks on about $100), and it’s totally worth the money if you have room in your budget. I noted in the C740 14 review that its 300-nit display was often challenging to see in a well-lit room, but that’s less so in the 15-inch model thanks to the increased brightness. I saw about 550 nits at maximum brightness in my testing.

I tested color with a SpyderX Pro colorimeter and got back 95% sRGB, 72% AdobeRGB, and 73% DCI-P3, all solid results at this price point. The display works with an active pen like Lenovo’s Active Pen 2, though one wasn’t included to test. Neither laptop is available in 4K, and neither comes with the option to add a dedicated graphics card (GPU). For those types of specs, you’ll have to check out something like the premium Yoga C940.

Getting into performance, both laptops come with a lot of the same available hardware. These are machines built for rather heavy productivity workloads, though the lack of dedicated GPU means you’d have a hard time getting into any specialized work. Both have RAM that’s soldered to the board, though you can upgrade the SSD after purchase. Both laptops also seem only to offer Wi-Fi 5 connectivity.

The C740 15 has a larger 60Wh battery compared to the 51Wh battery in the 14-inch C740, balanced by the larger display and upped brightness. Like the C740 14, the 15-inch model saw about six hours of battery life on a charge at about 60% brightness. It does offer Rapid Charge so that you can gain back about 80% life in an hour. I ran some synthetic benchmarks to see precisely how performance stacks up.

CPU

Geekbench 5.0 Benchmarks (Higher is better)

Device CPU Single core Multi core
Lenovo Yoga C740 15 i7-10510U 1,229 3,531
Lenovo Yoga C740 14 i5-10210U 1,094 3,767
LG gram 17 (2020) i7-1065G7 1,208 3,349
Acer Swift 5 (SF514-54T) i7-1065G7 1,202 3,600
Surface Pro 7 i7-1065G7 1,205 4,852
Surface Laptop 3 13.5 i5-1035G7 1,177 4,413
Surface Laptop 3 15 Ryzen 5 769 2,720
Dell XPS 13 2-in-1 7390 i7-1065G7 1,209 3,571
Dell XPS 15 7590 i9-9980HK 1,176 7,624
Dell Inspiron 13 7390 2-in-1 i7-8565U 1,111 2,965

The 10th Gen Core i7 CPU gets an excellent single-core score, though its multi-core score falls short of the 10th Gen Intel Core i5 CPU found in the 14-inch C740. This could have to do with a bit of thermal throttling, or it could be just the CPU itself.

PCMark

PCMark 10 Express

Device Score
Lenovo Yoga C740 15 5,302
Lenovo Yoga C740 14 4,941
LG gram 17 4,157
Acer Swift 5 (SF514-54T) 4,415
Surface Pro 7 (i5) 3,992
Surface Laptop 3 15 (AMD) 4,006
Dell XPS 13 2-in-1 (7390) 4,427
Dell Inspiron 13 7390 2-in-1 3,764
Dell XPS 15 7590 5,521
Dell Precision 3541 3,906

The PCMark 10 Express test measures how well a laptop handles several everyday tasks. An excellent score here from the Core i7 CPU and 12GB of RAM.

Cinebench

Cinebench (R20) (Higher is better)

Device CPU Range
Lenovo Yoga C740 15 Core i7-10510U 1,415 to 1,613
Lenovo Yoga C740 14 Core i5-10210U 1,450 to 1,535
LG gram 17 i7-1065G7 1,079 to 1,199
Acer Swift 5 (SF514-54T) Core i7-1065G7 1,361 to 1,400
Lenovo ThinkPad P53 Xeon E-2276M 2,686 to 2,701
Surface Laptop 3 13.5 Core i5-1035G4 1,584 to 1,606
Surface Laptop 3 15 Core i7-1065G7 1,703 to 1,745

Running the Cinebench R20 render test multiple times in a row can show how well a laptop deals with heat and thermal throttling.

SSD

CrystalDiskMark (Higher is better)

Device Read Write
Lenovo Yoga C740 15 1,442.30 MB/s 357.40 MB/s
Lenovo Yoga C740 14 3,408 MB/s 2,982 MB/s
LG gram 17 (2020) 3,477 MB/s 2,900 MB/s
Surface Laptop 3 15 2,028 MB/s 806 MB/s
Surface Laptop 3 13.5 2,338 MB/s 1,583 MB/s
Acer Swift 5 (SF514-54T) 1,641 MB/s 1,025 MB/s
Lenovo ThinkPad X1 Extreme (Gen 2) 3,416 MB/s 3,016 MB/s
Lenovo ThinkPad P53 3,567.23 MB/s 2,813.25 MB/s
Lenovo ThinkPad P52 3,120 MB/s 1,551.5 MB/s
Dell XPS 15 7590 3,000 MB/s 2,796 MB/s
MSI PS63 Modern 3,300 MB/s 1,875 MB/s

The M.2 PCIe SSD here is extremely slow and doesn’t come close to comparing to the 14-inch model. Manufacturers generally have to use whatever SSD they can source, so hopefully, this isn’t an issue seen in all 15-inch C740s. In any case, you can swap out the SSD after purchase.

Should you buy Lenovo’s Yoga C740 15?

Lenovo Yoga C740 15

Source: Windows Central

The Yoga C740 15, thanks to a larger display and full keyboard with a number pad, is a better fit for anyone with heavy productivity in mind. It’s not as portable, nor does it make as good of a tablet as the 14-inch version, but it’s still a sleek aluminum convertible that’s undeniably well built. The option to upgrade the display to 500 nits brightness with Dolby Vision HDR is no doubt also going to be attractive for a lot of people.

3.5 out of 5


However, the 14-inch Yoga C740 does make a better all-around convertible laptop. Its display isn’t as impressive, and it lacks the extra USB-A port, but its top-firing speakers, keyboard layout, and smaller size were preferable. Both laptops are priced quite competitively, coming in well below $1,000 to start. If you’re searching for something more in the premium vein, be sure to have a look at the Yoga C940 with dedicated GPU, 4K touch display, and soundbar hinge.

15-Inch Convertible

Lenovo Yoga C740 15

Bigger screen, more keyboard

Bottom line: The 15-inch Yoga C740 is right for anyone who absolutely needs the extra screen space, HDR support, and full keyboard, though the 14-inch Yoga C740 is no doubt going to be better for most people.

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