Originally Posted by 8bit ok this is the machine spec (only currently powered devices listed):
Abit AN8 Ultra
AMD athlon64 3500 venice
ATI Radeon X300SE (passively cooled)
the little audio card that came with it
1x Maxtor Diamondmax 10 80Gb
1x DVD ROM drive
2x 512Mb arianet PC4000 RAM dual channel mode (tested fine with memtest86)
1x floppy drive
check my specs in my sig and chuck in about 5 USB attached and USB powered devices, some lights, a stack of fans and a Creative Audigy sound card. Is my akasa 460w that runs that lot really going to struggle with the spec above???
A 460w Akasa shouldnt have any problems with that unless its giving unstable voltages. The NF4 platform can be very picky about PSU's. Then again, to have the same issue with 2 different ones does seem unlikely.
Time to play with some parts.
Take out the audio card. Unplug the HD / DVD, one RAM module, and kill the floppy drive.
With the IDE devices and floppy, make sure you unplug the ribbon cable too - it can cause problems if they cable is left in with the drive having no power too it.
Put in 1 USB device, somthing basic like a pen drive, and give it a shot on your 460w PSU.