This is a bit of a problem - one PSU went down, so I put in another one and, blow me, that went down as well after a few hours' use.
The original one was a 680W Thermaltake PURE, the replacement was a Silenx 400W.
I don't want to go putting in another PSU and risk killing that until I can feel comfortable that this has just been sod's law at work. However, the Silenx 400W has proven itself very unreliable here - this is, I think, the third of three of them to go down (all used in different PCs) - though I blame myself for that, I was warned off them but took no notice!
Motherboard is an ASUS A8V Deluxe; CPU is an AMD Athlon 64 FX-55 with a Gigabyte 3D Cooler; and the graphics card is a Radeon X800 Pro 256MB.
The PC contains 2x SATA HDDs and one PATA DVD burner; plus four 80cm case fans (one of which is one the side panel and was not being used when the second PSU went down).
The PSU I have lined up to go in there is a 400W SilentQ; I think that's powerful enough but would appreciate hearing a team verdict on that, too.
TIA
Bob