Random crashes/errors

[Fidley]

Hi,
Been having problems with my pc for a while, even rma'd my cpu to scan only to find it works flawlessly . When running super_pi i get 'non convergent IRQ' or similar, and after a while of playing worms 3d () i get a random BSOD, machine check exception springs to mind, nfs:u hangs, basically when the pc's under heavy load it brain farts. Memtest86+ ran fine for 16+ hours without error and ati tool finds no artifacts. Now i've had a new gfx card, mobo, cpu and mem so i'm thinking it's the psu. Has anyone else got any ideas tho before i buy a new one, if not is the seasonic 500w jobbie a good choice?

PC Specs:
X2 3800+
2 gig o corsair valve
abit an8 ultra
Akasa 460 watt paxpower
BFG 7800 gt OC 256
2 HDD's (200gig sata & 80gig ide)
DVD-RW

PS: I know noone locally with a powerful enough PSU to try in my machine!

TIA

Fidley

[peterb]

"Non-convergent IRQ" sounds like a set up error or a conflict, but odd that it only occurs with one app.

The failures under heavy processing load points to either CPU overheating or thge PSU shutting down on overheat/ PSU voltage dropping under heavy load. (Had a similar problem on a Linux box PSU when ripping CD's to MP3! Solved by improving airflow through the case.)

[Fidley]

Side is off the case, and temps are well below problem temps.

Oh and sorry the error is an internal super-pi one which reads 'Not convergent in SQR05'. Sorry for the misleading post!

PS: I've tried setting all the mem latencies manually, as i've read that abit boards have problems with this, no joy!