Just tried F5a Extreme, I am still getting problems with reboot. Hard reboots, ie shut completely down, restarts ok. But reboots, upon restarting, system does not turn on keyboard (no green light) and does not turn on monitor (no green light and blank screen), even waiting 2-3 minutes and can not hear windows load. Also if enter bios, hit save and exit, again blank screen, and no green light on keyboard. Going from f4m to F4/F5a some serious bugs...but like freshy said, with very quick release after looks like they are trying to fix.