Originally Posted by kithylin
It could just be the card overheating some how... All video cards, AMD or Nvidia will drop monitor signal, black screen, and throw fans at 100% until you hard turn the computer off if they overheat too far. It's a failsafe mode typically. Unless I'm misunderstanding, I think in one post you said it was hitting 93c. AMD cards are rated for up to 95c typically but.. anything in the 85~90c range is close to the "emergency thermal black screen" mode.
The ASUS R9 390X Strix is "famous" for its high temperatures, and unfortunately has a bad hardware design regarding cooling :-( I've watched a youtube video where some experienced guys did a hardware mod to reduce the temperatures a little, in the end they achieved a maximum temperature of 87c. For anyone interested, here's the link (german):
With generaleramons newest modded BIOS I now have a maxium temperature of 89c playing "Just Cause 4" on highest settings for almost 6 hours.
In my case, the black screens regularly DON'T occur when the GPU is running at high temperatures, but when it's dealing with simple tasks, like playing a video stream. I've had black screens after seconds I powered on the PC and started a video stream (not even in HD)!
However, so far with generaleramons newest BIOS mod I didn't have a black screen in "2D" affairs, and I'm hoping this will not change. I will report back - fingers crossed