Another vote for powersupply.
Your PSU may be doing +5 volts as you say, but if you take a look on the sticker you will see that the PSU is rated less than 2amps on the +5 volt.
A lot of mobo's are having probs with this. I read on a newsgroup a while ago an Asus tech recommending not to use a PSU with no less than 2 amps on the 5volt rail FWIW.
Have you tried a PSU that is rated as above 2 amp on the +5 volt rail? Preferably non Enermax
Im getting kinda tired of seeing people recommend Enermax PSU's when they have this defficiency. Its about time Enermax were forced to get their act together on this IMO
