So I recently installed my 2 flashed 6950's (fully unlocked and 6970 speeds). However, in crossfire mode, the second card was not registering it's temp in MSI's Afterburner on-screen display. However, all of the temps for both cards would register in GPUz. I even ran a sensor log and everything was hunky dory. However, I'm pretty particular about the temps my GPUs' run at so I like to monitor them while gaming. I haven't let any GPU I've ever had go over 75C. Anyway, so I decided to update my driver from 11.12 to 12.1. It seemed to work fine at first, but then I got a hard lock. Restarted, got into windows, hard lock again. Switched the cards back to the original 6950 BIOS, no change. Pulled out lower card no change. So I put my 560Ti back in and haven't had any issues. NOTE: I have used each card individually for extended periods of time with no issues. Has anyone else had any similar issues with the 12.1 drivers?