There's an FAQ on the XFX website which makes mention of 5700 XT Thicc fans not spinning. It recommends using either driver 19.9.3 or 19.8.2. It makes mention that if you're using The 19.9.1 and 19.9.2 that can cause problems, even though I was using a a more modern driver the problem seems to have persisted. I DDUed my current drivers and installed 19.9.3 which seems to have corrected the problem, I have full control of the fans in Afterburner now, and can set them to any fan curve which seems to respond accordingly. I can also set them to spin at any % if I want too.