The screen went colored-noisy and crashed Windows. When rebooting, image is OK, but it turns black on the login screen (with signal but no cursor). After several tests cleaning dust and reconnecting monitors (there are 3 connected), and trying a new driver version... the only way I can put it to work is with the basic MS driver. But now there are strange faint patterns of stripes all over. I'm using it in 1080p right now... Since MS driver uses only the base memory, my guess is there's something wrong with the VRAM. During the installation of a new driver, just after the driver restart, the screen goes black (with signal) and seconds latter Windows freezes.
What do you guys think? Is there a diagnostic for the card that can use? Can it be the GPU? What other tests I can perform?
[Windows 8.1 Pro]
[AMD 7850 : Catalyst 15.7]