Lenovo Legion Y740 Gaming Laptop Deep Dive Review With Benchmarks

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Lenovo Legion Y740 Review: Battery Life, Acoustics And Thermals

Battery Life - How We Test:

Our custom HotHardware video loop test takes a 1080p HD video with a 16Kbps bit rate and loops it repeatedly, with 1 minute break intervals in between. A timer log file increments minutes of up-time, every minute -- along with the grand total -- before system shutdown is stored and logged. This is a lighter-duty test that is still a bit more strenuous than many office productivity tasks. During the test, we keep Windows 10 Quiet Hours enabled and the display has been calibrated with a meter on pure white screens to as close to 115 lux as possible. For the average laptop this is somewhere between a 40 - 60% brightness setting. Because laptop displays significantly affect power consumption and battery life, it's important to ensure a level playing field with respect to brightness of the display for battery testing. And, since many laptop displays vary in brightness at each respective setting in Windows, this calibration with a meter is critical to ensure all displays are set to as near identical brightness output as possible, before running battery tests.

Lenovo Legion Y740 battery life

The Lenovo Legion Y740 has a 57Wh battery, which is small for a gaming laptop of this caliber. This means if you're not plugged into the wall you're only looking at about two hours of up time, and that's not even under a heavy load. If you're really pushing the CPU and GPU on board this machine, you'll get much less battery life overall. Battery life is part of the reason we see the Legion Y740 more as a desktop replacement solution than an all-out portable gaming laptop. 

Lenovo Legion Y740 Acoustics & Thermals

Alienware m15 Internals

The Lenovo Legion Y740 has a total of three heat pipes. One is shared between the CPU and GPU, while each have their own pipes as well. There are also two fans set on opposite sides, allowing the heat to be dissipated out of each side edge of the laptop. Overall, the Legion Y740's cooling solution did a decent job keeping the system cool, though it did seem thermally saturated at times and the fans could really spin up loudly under load. At some points while gaming, the fans were so noticeable they drowned out some of the in-game audio, though this is to be expected somewhat from a machine with this class of firepower on board.

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