How we test

To better understand the graphs, it’s worth understanding the exact tests we put each laptop through

We measure a laptop’s performance using a range of tests. The PC Pro benchmark measures how quickly each system can process a standard set of image and video files, and handle multiple workloads while simultaneously playing a video. We also test using PCMark 10, Geekbench 5 and Cinebench R23.

We test the internal SSD using the AS SSD tool, which determines sequential read and write speeds. This month, we also timed how long it took to transfer 11GB of mixed files via a USB-C port.

Next we test gaming performance using 3DMark, Dirt: Showdown and Metro: Last Light. If a laptop has discrete graphics, we test it in Metro: Exodus and Shadow of the Tomb Raider. All benchmarks shown here are at 1080p at High presets.

We then move on to the screen, using an X-Rite colorimeter to establish the maximum brightness the screen is capable of, along with its effective contrast ratio, sRGB coverage and colour accuracy. The latter is expressed as a Delta E figure, with a score of 1 or below representing perfection as far as the human eye can discern.

Finally, we test each laptop’s battery life, using a videorundown test and two tests built into PCMark 10. First, the “modern office” benchmarks, which mimic a working day, including video calls, writing letters and spreadsheet work. We use the Gaming test to push the graphics chip to the limit. In all battery tests, we set the screen to a brightness of 170cd/m2 and let the laptop keep going until it reaches 5% of its battery capacity. In the office and gaming tests, we keep Wi-Fi on; for the video-rundown test, we put the laptop into flight mode.