After a ton of time and effort I finally fixed my stability issues and all my Developer 6068 errors in COD: Modern Warfare. I purchased my Powercolor Red Devil 5600 XT at release time and immediately flashed the new bios that AMD/Powercolor released at the last minute. I've had nothing but strange issues with the card, random lockups, black screens and a ton of crashes and developer 6068 errors in Modern Warfare. The latest Radeon driver decreased the issues but the errors in Modern Warfare still remained. The card has a bios switch I totally forgot about. I never flashed the Silent bios so it was the original. I switched to that and suddenly my card was stable and I had no crashes or errors in anything. This afternoon I flashed the card to the original OC bios and so far everything has been perfect. I think there are issues with the card running the GDDR6 memory at 1750 instead of 1500. I'm thinking MSI's statement about the memory instability at 1750 is accurate and AMD just screwed up.