I pulled it out after I started having issues, and I have used it before on this rig for much longer periods of time with no issues. PSU could be bad, but it looks/sounds/smells ok.
Are you installing just the barebones driver? Best practice is to clean all drivers off the system, then run the AMD installer, wait for it to extract, then cancel the installer. Then go to your Device Manager and right click the card, manually install the driver, that way you get none of the AMD junkware.
I use AMD Cleanup 1.2.1.0 with Windows 7, but you must
not use it with Windows 8 as it will corrupt the OS. This looks like it could work:
http://forums.guru3d.com/showthread.php?t=379505Anyway here are the instructions for installing barebones drivers:
Go to Start Menu > Control Panel > System > Device Manager > and expand 'Display adapters'.
Right click the display adapter that corresponds to a Radeon 280X and click 'Update Driver Software...'
Click 'Browse my computer for driver software'.
Click 'Let me pick from a list of device drivers on my computer'.
Click 'Have Disk...'.
Paste the following path into the 'Copy manufacturer's files from:' box:
C:\AMD\Support\14-4-win7-win8-win8.1-64-dd-ccc-whql\Packages\Drivers\Display\WB6A_INF
Click 'OK'.
Select 'AMD Radeon HD 7800 [or 280] Series'.
Click 'Next'.
Your screen will flicker while the driver is installed. This may take a while.
Eventually you will see 'Windows has successfully updated your driver software'.
Click 'Close'.