since the majority of posts you see on forums like this are about issue with hardware, let me just say I have a UD5, that I keep clocked at 3.6ghz (i haven't even tried more, satisfied for now on a 1ghz overclock that is 100% stable, 20x180). I had all these other bios's downloaded and ready to go, but decided to stick with F3 at first (what it shipped with), and have had no issues. No bluescreens, lockups, restarts, coldboot issues, or S3 hibernate issues. Very happy with this motherboard.

(though I will say to be fair, this is my second one. First worked fine as well, but for some reason the bios wasn't seeing 6gb of mem, though windows was...weird. Even though it didn't seem to cause any issues, i didn't want a $300 defective mobo, even if it was just cosmetic. This second one though I have absolutely no issues.)