TS intel system unlikely to need more than 250 W at full load and that is being generous... that is if the 95W tdp i5 and 108W radeon 5770 are fully loaded with all the hd, fans, dvd fully spinning...

TS, it will be better if you state your psu causes your system to auto-restart. My Antec tp-650 also same issue last few week. Check with Convergent and still has warranty. Gonna sent for rma soon.
Do share with us your experience at Convergent service centre . May i know this PSU last you how long till u encounter this problem?
Convergent check with Antec and inform me the psu still under warranty. Shall sent rma next week. 4.5 years then encounter this problem.
Rma a FSP Aurum 400w 80+ bronze ,5 yr warranty but power degraded on the 3rd yr so rma. Was given 2 option
1) free 1 to 1 exchange to same model reflurish unit (look old to me)
2) top up $45 for 550w 92+ platinium with 2 yr warranty from now. (which my warranty still got 2 yr more for 400w 80+ bronze )
which has a better deal ?
Thanks