Testing the Surface Book 2’s power problem The “Best performance” setting triggers differences in the GPU clock, and a notable increase in fan speed and audio volume. It’s a setting that’s not usually enabled, but with the Surface Book 2’s discrete GTX 1060 GPU, it’s likely some users will enable it for gaming to unlock the laptop’s full performance-and that’s exactly what we did in testing the Surface Book 2. “The Surface Book 2 Power Mode Slider is provided as a means to give the user control over the range of performance and battery life,” a spokesperson explained. Microsoft confirmed the purpose of the slider. Though we’ve never tested the slider’s specific effects, anecdotally I’ve found that Windows typically auto-adjusts it for battery or AC power, tweaking the performance accordingly. ![]() The excessive power draws occur only under a specific condition: when Windows 10’s Power Mode Slider (a feature you’ll see more of in the Fall Creators Update) is dialed up to “Best performance.” This slider, accessible via the taskbar, provides three increments of battery/performance: “Best battery life,” “Best performance,” and a midrange setting. ![]() When “Best performance” isn’t the best choice IDG / Mark Hachman
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