Crazy Graphics Glitches with EVGA 7900GT

I've read that EVGA screwed the pooch with their manufacturing of the 7900GT, and I think I'm starting to see mine fail big time. Playing any game for more than a few hours causes huge crazy tearing and artifacts all over the screen. WoW looks like an acid trip, and CoH stretches all the units out to crazy proportions.

Am I right in assuming these are because my card is failing, and not due to some other mystical cause?

I'm looking to replace my 7900GT with a 7900GS instead. Just wanted to know if anyone out there knew if this was the correct solution.

>>2 Why would you think downgrading would be the 'correct solution'?

Well obviously, I don't have a fucking clue.

What would you suggest instead? Simply getting the same card again?