My 1 year old XFX 6870 was experiencing an issue. every hour my screen goes black no signal from monitor and a very loud fan noise starts so I was forced to restart the pc manually.
Sometimes after I log on to windows my monitor goes black also and the pc hangs.
Then today it's totally dead tried to open my pc and no signal coming from the monitor and the video card fan was not spinning.
Need possible solutions for this issue
Possible Solutions Made:
Removed and installed latest drivers and uninstalled msi afterburner = No Luck
Re-seated the graphics card = No Luck
Removed the 6870 and use the on-board graphics card to temporarily use my PC
XFX Support is great. I suggest calling them if you discover the GPU fan is bad. I'm sure they will send you a new FAN or even replace the card as long as the warranty is not up. However, you said it is one year old. You might be close. Better contact them ASAP.