Hi, I was hoping someone could help me out. I built my system with the Sapphire 4870HD and it runs smooth as silk. The only problem occurs when AA is turned on. I get wierd corruptions (Rectangular white/gray blotches) that flash. This problem only occurs with AA on (Tested at 1280x1025 and 1680x1050. With AA off this doesn't seem to be a problem. I switched AA from box to edge detect and that didn't do anything. Games where I see this problem are in Crysis demo (All settings high), Sins of a solar empire and supreme commander. I actually haven't seen a game where it doesn't occur. I have attached a screenshot from sins, look at the planet to see the corruption. **edit posted the full size picture two posts below for those not wanting to click on the link** My catalyst version is 8.7. Any help or suggestions would be greatly appreciated. Thank you.