Lenovo Yoga C640 Review:

Lenovo’s revised naming strategy perplexed us all when it unveiled its 40-series laptops late last year. The Yoga sub-brand, which once stood for convertible touchscreen computing, now stands for luxury computing. One such example is the Yoga S940.

The IdeaPad brand, which had previously stood for mid-range mainstream computing, now includes convertible devices such as the IdeaPad C340. The Yoga sub-brand, on the other hand, has returned to its convertible beginnings. The Lenovo Yoga C640 is here to help.

The Lenovo Yoga C640 is a mid-range convertible laptop that lies between the more affordable IdeaPad C340 and the more costly Yoga C740, while the Yoga C940 sits much further up at the top of the list.

The Yoga C640 is available in a single configuration with a starting price of Rs 71,818 but may be customised to order with upgrades to the CPU, screen, and storage. The Yoga C640, like the IdeaPad C340, includes a stylus for the touchscreen surface. Let’s take a closer look at the remainder of the bundle now.


Our Yoga C640 review device came with an Intel Core i5-10210U processor and 8GB of RAM. A Samsung 512GB PCIe NVMe solid-state drive was used for storage. The review unit performed poorly on our regular benchmark tests, despite the fact that its everyday performance was excellent.

It scored 3301 points on PCMark 8’s Accelerated Creative test, trailing the Asus ZenBook Flip 14 and the Lenovo IdeaPad C340. The same was true for 3DMark’s Fire Strike and Sky Diver. You can read our reviews of the Asus ZenBook Flip 14 and the Lenovo IdeaPad C340 here and here, respectively.

On this Lenovo convertible, the latest 10th generation Core i5 CPU is used.

The review unit performed as well as I had hoped on our daily performance test. I was able to multitask between numerous virtual desktops using typical apps such as Chrome, OneNote, Word, Excel, iTunes, File Explorer, and WhatsApp for PC without experiencing any latency or stuttering.

Even when the number of tabs on Chrome exceeded thirty, the review unit replied with adequate vigour.

When I used Win + Tab to move between virtual desktops, there was a little wait. Despite this, the review unit showed to be a capable performer in ordinary computing chores.

The laptop’s ability to enter a state of ‘connected slumber’ while the lid was closed amazed me the most. The lock screen showed as soon as I opened the lid again, just as on an Apple MacBook.

The C640 outperforms its benchmark results on a daily basis.

It’s worth noting that the Yoga C640 review unit suffered from the same software fault that plagued the ThinkBook 14 we evaluated last year, in which a background process called ‘Lenovo.Modern.ImController.PluginHost.exe’ ran amok and produced frequent stutters in the window animation.

You may learn about how I got around it by clicking here. The similar solution was effective with the Yoga C640. If the fault remains across all recent Lenovo machines, the business should pull its socks up and investigate.

The C640’s graphics performance much outperforms its benchmark ratings.

After over three weeks of use, I believe it’s reasonable to say that the Lenovo Yoga C640 is a decent choice for consumers looking for a convertible with adequate power for everyday computing chores. You should be able to utilise standard apps like Word, Excel, PowerPoint, and Outlook without lag or stuttering.

Despite the lack of a dedicated graphics card on board, you should be able to utilise it for some basic picture editing. However, if you want to play lightweight video games like Doom and Metro: Last Light on your next buy, consider a model like the HP Pavilion x360, which comes with an Nvidia GeForce MX250 graphics card and 2GB of dedicated video RAM.


The Lenovo Yoga C640 can demonstrate that it is a contemporary connected device thanks to the newest Intel 10th Gen CPU. In other words, it has a long battery life.

During one of our daily test runs, the review unit lost half its charge in around four hours of heavy surfing at 80% screen brightness and full keyboard backlight brightness. Furthermore, music was playing in the background via headphones on a YouTube window.

Despite the very low benchmark score, a single charge will provide you about 9 hours of battery life.

I found that the review unit lost roughly 10% of its battery per hour in subsequent tests with comparable conditions (fewer applications). Interestingly, turning off the keyboard backlight or lowering the screen brightness had no discernible effect on the amount of hours managed by the battery.

Unfortunately, it performed badly on our normal battery benchmark test.

Its time was 3 hours and 41 minutes. Even if its benchmark score is low, it’s reasonable to conclude that the Yoga C640 will provide between nine and ten hours of battery life on a single charge, which is rather respectable for a convertible laptop in this price range.

Display, Touch Performance, Audio, and Input/Output (IO)

The Lenovo Yoga C640 boasts a 13.3-inch Full HD IPS touchscreen display with a peak brightness of 300 nits. If you prefer to construct the laptop yourself on Lenovo India’s official website, the optional 400-nit panel costs an additional Rs 485. The colours on the review unit’s screen were well-balanced and not oversaturated.

However, due of the reflection generated by the outside glass panel, writing on the screen became frequently illegible. If you work in an office with harsh overhead lighting, you may find yourself often tilting the display back and forth. Overall, it’s a panel that’s suitable for casual browsing, spreadsheet editing, and video viewing.

The screen is bright and colourful, however it is prone to glare.

The Lenovo Yoga C640 comes with an Active Pen pen with a pressure sensitivity of 4,096 levels. The review unit’s screen’s touch sensitivity was ideal for tablet-mode operations like sketching and jotting notes.

In fact, I found the laptop’s large aspect ratio troublesome for portrait-mode use since there wasn’t enough page width to fit too many words in a sentence. The auto-rotate feature was also a little sluggish to respond. Overall, the Yoga C640 is a good tablet, despite being a far superior laptop.

Touch responsiveness is also quite nice.

The Yoga C640 is equipped with two upward-firing speakers, one on each side of the keyboard. At best, the sound from these speakers is bland and uninspired. While it’s loud enough for a few brief YouTube video clips inside a quiet bedroom, it’s not suitable for watching a TV show with your pals in a crowded coffee shop.

The Dolby Atmos software is pre-installed on the Yoga C640, allowing you to select from a variety of preset surround sound settings and equaliser curves. You may also create your own output curves.

Top-firing speakers are a colossal letdown.

The Lenovo Yoga C640 has enough connection options. A proprietary round-pin power port, a USB-A 3.1 port, and a 3.5mm audio jack for headsets are located on the left side of its body. On the right, we can see another USB-A 3.1 port as well as a USB-C port (with support for DisplayPort and Power Delivery). There’s also a short power button that provides good feel.

The Yoga C640, like the majority of contemporary Lenovos, has a hardware sliding shutter for increased camera privacy. This eliminates the need to place a little piece of tape over the webcam to maintain perfect privacy. The Yoga C640 also has a fingerprint scanner beneath the keyboard with in-sensor authentication, which syncs quickly with Windows Hello for sign-ins.

Touchpad and Keyboard

The typing experience on the Yoga C640 is adequate but not enjoyable. The keys are proportioned and spaced correctly, however they lack softness and travel. As a consequence, lengthy hours of typing seem clumsy and awkward.

The backlighting has two brightness levels, however the first is completely worthless even in complete darkness, thus leaving you with an on/off button. To summarise, the keyboard of the Yoga C640 is adequate for occasional emails but inadequate for big papers.

The keyboard performs well for brief emails and documents, but it might have been better.

Despite being a Windows 10-certified precision unit, the touchpad on the Yoga C640 lacks accuracy and linearity in pointer movement. Furthermore, the touchpad surface is strangely sticky and resistant. This implies that in order to enjoy an average touchpad experience, you must crank the sensitivity and cursor speed all the way up to maximum.

On the bright side, multi-finger taps and gestures, such as three-finger taps and four-finger swipes, function effectively right out of the box. In conclusion, during lengthy work periods, you’re better off with a dependable mouse.

Despite the fact that it is a precision device, the touchpad has a peculiar resistive feel about it.

Construct and Design

The Lenovo Yoga C640 has a small 13-inch form size, a solid structure, and a simple design. Its’sandblasted aluminium shell’ provides enough structural strength and grip. The base panel, including the keyboard island, features a gripping, pleasing soft-touch surface comparable to that seen on the Dell XPS 15-inch.

The Yoga C640 is also fairly light at 1.25kg. Furthermore, the laptop’s relatively small power brick is meant to fit straight into a wall socket, reducing connection clutter.

The Yoga C640 is rather attractive.

When you open the laptop’s lid, which is luckily a one-handed procedure, you’ll see a 13.3-inch display with a glossy surface. The bezels on the sides are relatively thin, however the bezels on the top and bottom are not.

Despite the fact that the Yoga C640 comes with an Active Pen pen, it lacks a storage silo. This means you’ll have to have the stylus on your person or in your luggage at all times. Nonetheless, the Lenovo Yoga C640 is well-built and well-designed for the price.It’s well-made and well-designed.


When compared to the less expensive IdeaPad C340, the Yoga C640 appears to be a more polished gadget with considerably superior fit and finish. It’s also more compact and lightweight due to its somewhat smaller 13.3-inch display. But, above all, it is the most recent addition to the market.

The Intel 10th Generation CPU inside provides both performance and efficiency, so you can easily anticipate more than eight hours of unplugged performance. It can also function as a Windows tablet, albeit it is more at ease as a normal thin and light laptop.






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