I bought yesterday an Enermax Coolergiant 430w PSU http://www.coolergiant.com/products/power_supplies/cool... , both MBM and bios are showing my +5v rail at 4.91v (idle). Under load (cpu burn in, prime95), the rail is holding rock steady at 4.83v and the hi/low log on MBM and webtemp is showing from 4.83-4.91, with an average of 4.88v. The +3.3 and +12 rails are freezed at 3.31v and 12.2v even under load. By the way, vcore dropped from 1.75v to 1.68-1.69v. I have no multimeter so i can't verify the exact values.
I know anything within +/- 5% is fine, but its an Enermax and not a cheapo noname thing, so why is only the +5v rail
fluctating so much??? Should i return it???
Enermax Coolergiant 430w
Cooler Master ATC 210 & 2*YS Tech Fans
MSI K7T Turbo
Athlon XP 1700+
Swiftech MCX 462 & Noiseblocker S4 Fan
ATI Radeon 9500 Pro
Adaptech 29160 SCSI
BM Ultrastar HDD
IBM Deskstar HDD
LG GCE 8480 CDRW
Sony DRU 700a DVDRW
3Com 3c905c-TX-M NIC
Those numbers are jsut fine. On my Enermax, happens to be the 5 that's rock steady,a nd 12 and 3.3 that fluctuate a little bit, but never enough to cause problems, and yours aren't enough to cause problems either. Don't worry about it.