It's an Enermax Noisetaker 370W. It should be more than powerful enough as it's quite a modest P4 system. I noticed straight away the rails looked a bit on the low side - the 12v rail in particular was reading as low as 11.5v, and usually 11.6v. I know you can't fully trust software readings on rails, but even so.
So anyway, it all worked fine for a day. Then I turned it on this morning and it had just loaded Windows when *clunk* it just powered off. Left it a while and turned it back on - this time it made it into Windows and seemed happy. Ran 3DMark, and sure enough a couple of mins later *clunk* and off it went again. Then it wouldn't power up at all again - just a brief flicker of power and that was it.
So I'm guessing it's the PSU, rather than anything else?
So anyway, it all worked fine for a day. Then I turned it on this morning and it had just loaded Windows when *clunk* it just powered off. Left it a while and turned it back on - this time it made it into Windows and seemed happy. Ran 3DMark, and sure enough a couple of mins later *clunk* and off it went again. Then it wouldn't power up at all again - just a brief flicker of power and that was it.
So I'm guessing it's the PSU, rather than anything else?