PSU is corsair 850w. Big block. There was no graphic issues before the gpu shuts down. From thermal readings from the rest of the pc is all normal operating ranges, it's the center of the gpu, when I first started getting the issuse was about a week ago now. When I checked the heat levels the center gpu sky rocketed to 90 the outer temp was normal 60 deg c. The card would get to 90, but at 93 it just cost out. Black screen, had to do a hard reset, sometimes rebooting didn't show a video picture and had to hard boot again after leaving it off for a min or too, also at that time, when windows loaded up the amd software would not.load saying missing drivers, checking the hardware manager I had a code 31 on display driver. Removing the card from the hardware.and re detecting it it was fine and the software loaded up. Looking though posts on this issue, I read to undervolt the gpu by a 100, so set it to 1100, also set the fan curve and rpm to a hirer level, also to de activate the zero fan. This worked for several days, heat came back to normal working levels and under gaming load on gfx settings back to 75 deg c. It was.only till yesterday and today this new mapping stopped working, the gpu would just cut out to a black screen with no video detected on the monitor, a hard reboot was needed. Just using the adrenaline software stress test was enough to cut out the card. Also vr gaming and also Web browser gaming more of world of war ships on max graphics settings, 10 mins of play card cuts out. I turned off the power settings for the monitor to power down when not in use, this stopped the gpu powering down with just windows 10 running. But still gaming the gpu still cuts out. Again there is no graphicle glitches before it shuts down