» Thu Jun 02, 2011 8:02 am
Yes evil is correct, your card is damaged. This is not just a driver problem, but the card itself is breaking. How am I so certain? Because i've seen this several times before over the years. Once with my old GTX 280 in fact, due to the problem that my PSU was not properly sending voltage to the card and had a rail-linking issue (I essentially **** up the card by hooking it up wrong because I crossed two slightly different voltage rails in the pair because the owners manual of the PSU was a lying sack of crap and I found this out later). What happend is 100% what you describe and the card eventually no longer worked. I had to send it back to EVGA for warranty, which they honored, and got a new one. I also proceeded to buy a new corsair PSU that specifically noted how I can hook up such cards in that way. Well you live and learn, since I had warranty on the card it only cost me the money to ship it back to get a new one plus the cost of a new PSU (which I proceeded to toss the other one as it was now broken).
I've also seen this many times prior to that with friends, other pcs, and so forth. All were due to improper voltage/wattage/amperage/omhs in power feed or incorrectly installed into the PC. I've never actually seen that occur with just driver issues themselves, that would be a mere blue-screen or a more typical style crash. Color pixelage is perhaps the very worst of video card issues, it in fact does mean it is physically damaged.
Side note: These cards never overheated either so that was not the case. It can break without being overheated if you take note of my experiences. How is your card hooked up? What's your PSU? Do you have linked rails in your PSU or each wire have it's own, seperate, balanced rails like my new one does? (You have to have one like that to not **** up these kinds of cards and yes it can be confusing)
Sorry to break it to you but that's the way it is. Been there, done that, hope you have warranty.