I've been having issues with the latest beta BIOS. My CPU(i7 930 Stock) overheated to 97C at 1.1% load, actually when it was idle. Speedfan showed that the CPU fan was running 3700+ RPM which is theoretically impossible on the Intel's stock cooler. I never had issues with cooling before. So I recommend staying with F6 to all UD7 owners at the moment.
Edit- I'm flashing to F6 right now