If you’re a usual user of a consumer device like the ROG Ally, when an update comes down, you install it. Certainly the device itself advises you to do so. However, if you already have a ROG Ally and are enjoying the machine’s high performance, don’t update to BIOS version 319 through the MyASUS app. While it fixes a couple of bugs—mostly

Source: Hot Hardware – ASUS ROG Ally Gets Bugfixes But Loses Performance With Latest 319 BIOS