I recently put in a Abit Radeon R9250R (See system below). I uninstalled the drivers for the on-board AGP on the motherboard and installed the software from the cd that came with the card.
Once I was up and running everything appeared fine, but then the computer would freeze, the mouse pointer would turn green, then the screen would go blank (black) for about 5 seconds then go back to where it had been and worked OK. Sometimes when the screen went blank the comuter would re-boot. Games would play OK (apart from the freezing).
I uninstalled the drivers and downloaded and installed the latest drivers from ATI. The same thing is happening, but not so often.
But when I try to play Return to Castle Wolfenstein, as soon as the opening page comes up, it freezes and the sound cycles about every second. I have to crash the computer. When I try to play Medal of Honor (which is what I got the AGP card for) It starts loading up OK but just as it completes loading it goes blank and then immediately back to the desktop.
Any help would be much appreciated
AMD Athlon XP2200+
40 GB Seagate Barracuda
300/250 ATX PSU
Abit Radeon 9250R 128mb DDR 64 Bits
Acer 17" AC901 monitor set to 85 Hz refresh rate