I ask because I just bought a Radeon 64MB from a user here at Anand, but it's an engineering sample. I've asked others who have also bought the card and they say they see it sometimes too. Now, I'm not saying that user is selling defective cards, but I want to know if this is a common problem and whether it as attributed to the drivers or just the card itself. Please give me your observations when you run Direct 3D apps with "Fast Z Clear/Optimization" enabled. Thanks!