as the title already teases, my Saphire AMD Radeon HD 7870 GHz Edition stopped working.
The first thing that happened were quite a lot of grey-striped screens which always forced me to restart my PC. These screens showed when I played some game (mainly CS:GO with frame lock on 100, so the card wasn't even in heavy use) after about 10 to 20 minutes. When I restarted the PC it wouldn't happen again that day. After some research I learned these are memory related and usually caused by cards with bad memory. Since my 7870 is about 3 years old and the problem wasn't there in the beginning I don't think that is the case.
One day, the card again made that grey screen, I rebooted, but the screen remained black and the monitor never got a signal. I tried removing and replugging the card in but that didn't help. Hoping this problem wasn't related to the card, I tried putting it in another PC. BIOS post was on screen, everything worked fine. When I got the card back in my PC it worked fine again. After a few days, the same thing happened. I tried putting the card in another PC but nothing on screen. Since my PC has an Intel Onboard Graphics chip, I wanted to find out if Windows would recognize the card, even if it doesn't show anything but when I try to start Windows with the Onboard graphics the only thing I see is a Bluescreen giving me the error "thread_stuck_in_device_driver". If I remove the card the error does not show up.
So, is my card finally dead or is there any chance of getting it back to life? I'm completely fine if I would have to clock it down a bit if that would help and be possible, since I could get along with a bit less than the full performance. Due to the age of the card, RMA is not a possibility.
Thanks for your help in advance.
In case you need it. My Specs:
Motherboard: Asus P8Z77-V LX
BIOS Version: 2303
CPU: Intel Core i5-3570
Ram: 16GB 1333MHz
Video Card: Sapphire AMD Radeon HD 7870