So..As long as i still have the stock heatsink and can put it back on video card im ok on this warrantee?...though if you had to register within 30 days of being bought well..that wouldnt be me i bought this in 5/06...but i have just redone my water cooling system and after a few days i am noticing that i have colored pixels on desktop and pixel streaks on some windows..which i have figured out to be bad video memory...is this RMA'able?