Hi, I own a Sapphire 7805 OC edition 2gb GDDR5, the problem is when it goes into its high performance mode in games on my monitor weird bars flicker. its hard to explain but only happens when it is in high performance mode. after about 10 minutes of gaming my monitor black screens and the gpu crashes and i need to reeboot my pc.
i have tried the beta drivers fir amd catalyst, (i used driver sweep to remove th old ones). I have also tried the last stable set of drivers. I have reinsatlled a fresh copy of windows and updated my mobo bios, none of this works.
RMA the card My 7870 had the same issues, it would crashes whenever I gamed. I traded it in for a Msi 660ti! The 78xx series AMD cards are know to get black screen crashes! They "said" they fix them, but the problem is still there and they still sell the old ones sometimes!
I have actually heard (you can check some of the comments where Sapphire actually responded to feed back on new egg) that Sapphire had a bad batch of cards that went out. It should have been correct on new cards but who knows if vendors actually sent back there stocks and Sapphire replaced or if just waiting for people to RMA there cards to replace them.