Surface Book 2 firmware updates correct major CPU and GPU issues
Several Surface devices have firmware updates that improve battery life or battery stability. The Surface Book 2, Surface Pro 6, Surface Laptop 2, Surface Pro (5th Gen), Surface Laptop, and Surface Pro 4 all have firmware updates. The updates generally improve battery life or battery stability, but the Surface Book 2 updates in particular correct some major issues related to CPU throttling and the GPU going missing from Device Manager.
The Surface Book 2 has the longest list of changes.
The Surface Pro 6, Laptop 2, Laptop, Pro 5, and Pro 4 have all received updates that help improve battery life. Each carries a different version number, but they are nearly all updates to the Surface System Aggregator. The only exception is the Surface Pro 4, which improves battery life with an update to its Surface Embedded Controller firmware.
The firmware updates are available for devices running Windows 10 April 2018 Update, version 1803, or greater. You can find the full list of release notes for each device at the Surface Update History site.
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