BF4 unplayable on Windows 8.1

So I decided to make the switch to Windows 8.1 after hearing good things about it as far as BF4 performance goes. I wasn't getting fantastic FPS in Windows 7 (between 40-70 on Medium) but on Windows 8.1, it has gone completely bonkers. I hit 6 FPS in an online match today, not 60, 6 FPS. It averages between 30-80 FPS, and the Micro stuttering is unbearable. Anyone got any suggestions? 

Edit: Before anyone even asks, yes I have installed AMD Drivers. The Newest ones to be exact.

Strange enough, installed beta drivers that were released just today, and no more issue. BF4 now runs better on Windows 8.1 than it did on 7.