The only things I can think of is to try different/slightly older drivers. Sometimes they change and mess up stuff in newer ones. Also try the Omega drivers. They supposedly fix some driver problems.
I once had a 9600xt video card. It was great. The problem with it though was that in bios/dos, the text was all garbled and strange. I narrowed it down to either some bad ram or bad pipelines (i think that the card reserves a pipeline and/or some ram to dos stuff and mine was broke)
If you can, try it in a different computer to see if something like that is the problem. And if so, try to RMA it through newegg. They are really good about that stuff. And make sure that you are always careful of static and stuff. I heard that if you shock a chip or something, it could still appear to run fine for quite a while afterward until you can see problems.
Maybe also see if you motherboard chipset drivers and bios are up to date.
Edited by nforce, 20 February 2007 - 09:19 PM.