Lenovo Flex 3 80JK0021US Review

May 14, 2015
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Lenovo Flex 3 80JK0021US is one of the convertible computers that can change from a laptop to tablet in the blink of an eye. Performance-wise it offers a lot, with components like Core i7 processor and 8GB RAM speeding up the system quite a bit. But it all ultimately comes down to value this laptop offers. So is it great bang for your buck? Let’s see if we can figure that one out here…


Intel Core i7-5500U is becoming a popular processor. It was released in the beginning of this year, along with the other 5th generation models. It’s a genuine i7, sporting a dual-core configuration, 2.4GHz base frequency and 3.0GHz turbo speed. The unit also features ultra-low voltage design. It means higher battery life, although only around half the performance than the high-end Core i7s possess. But by all means, Core i7-5500U is a fast processor, cabable of running any application you throw at it without issues.

Lenovo Flex 3 80JK0021US features 8GB DDR3L RAM, and as far as I know that’s maxed out. Anyway, eight gigabytes is plenty for a laptop (even more so for a tablet). The storage solution is very modern: a hybrid hard drive, offering something good from the HDD and SSD world both. The size is 1024GB while the 8GB SSD cache will make the drive run faster than a HDD-only machine. It’s not as quick as a real solid-state drive, but of course installing one on this model is possible.

Screen and graphics

The display of Lenovo Flex 3 80JK0021US is 14″ big. The best thing is Full HD resolution, so a lot of screen estate and high quality video streaming are guaranteed. Naturally, also touch is supported, and the display turns 360 degrees allowing for easy switch from laptop to tablet mode. The panel type is In-Plane Switching, so you should get higher quality image and better viewing angles than on cheaper Twisted Nematics panels.

The laptop might be multifunctional, but it doesn’t excel at gaming. There’s no dedicated graphics in it, just the CPU-integrated Intel HD 5500 chip. It’s however faster than previous HD 4000, so many games work fine if you don’t mind keeping eye candy at bay. For example, playing Battlefield 4 on low details should net you ~30 FPS. GTA V wouldn’t reach that, but still a playable 25 frames per second. Older games, like MMOs or Steam-based games, run much better.


Lenovo Flex 3 80JK0021US offers two USB 3.0 ports and one USB 2.0 port. An HDTV or PC display owner can also plug his monitor to the laptop’s HDMI output.

The notebook has RJ-45 connector and 802.11 A/C WiFi for networking. It also supports Bluetooth 4.0.

Optical drive is non-existent in these Flex 3s. One solution would be to hook up an external optical drive (they’re cheap, around 30 dollars). The 4-in-1 card reader can also be helpful.

The laptop offers a front-facing 0.3MP webcam and microphone. Unlike actual tablets, there’s no rear camera in this model.

What else to keep in mind?

Lenovo Flex 3 80JK0021US weighs 4.3 pounds. As a comparison, regular 15″ notebooks are about 5 lbs. As such, it’s not hard to carry around. The 3-cell 45WHr battery should be good for around 4 hours on a single charge.

The keyboard seems to be backlit. There’s no numpad on the right, 14″ size doesn’t really allow for that.


Lenovo Flex 3 80JK0021US is meant for people who want laptop and tablet, but don’t want two different devices. This 2-in-1 computer can be used either way, and the i7 processor and 8GB memory should be sufficient for most folks, including power users. The high quality display comes with treats like IPS panel and Full HD resolution. Connections are adequate, two USB 3.0 ports and A/C WiFi being useful features to have. The price is bit salty, but if you have the money and want a solid convertible laptop, you might as well go for this one.

Not interested? Take a look at these laptops:

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