*shrug*
Running a 9500 Pro, CD-ROM, CDRW, 80 GB SATA HD, Athlon 2500 OC'd to 2800, 512 MB RAM on a generic 350 watt PSU with decent, though not stellar, amperages on each line. Actually really close to the amperages on the Antec true330.
I don't think its his PSU. Yes, squirrely PSUs can be a problem, but unless you have wildly varying voltages, and your amperages and rated wattages are way below advertised spec (I've seen some "400W" PSUs with amperages and wattages BELOW typical 300W PSU levels) a decent 350, or that 330 should be fine for most people.
BB