I have taken my rig, which includes the above mobo, and swapped it to a larger and better cooling case. It was working beautifully at the time of the swap. I changed no other components. The boot drive is a 320g sata drive, and there is a sata raid and a couple sata optical drives as well. Now, when i try to boot, the computer does not see the boot drive. Although the machine recognizes the sata raid and all the optical drives, no where; not at post, not in bios, does it recognize the boot drive. I've tried unplugging all but the drive in question. I've put that drive in another machine, and it appears perfectly happy. I've tried another bootable sata drive and it doesnt see that one either. My memory (questionable at best) recalls something about this issue somewhere along the way but I've searched the topic and don't find it. Does anyone have any thoughts about this? thanks zz03