Review: Lenovo’s Yoga C740 15 offers display upgrade, full keyboard
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
Lenovo Yoga C740 15 at a glance
Source: Windows Central
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 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.
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.
Source: Windows Central
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.
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?
Source: Windows Central
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
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