what q-tec was it ? I haven't had any pobs with my q-tec 550W PFC PSU. Maybe its because its the more expensive PFC version, I got it for £15 anyway :D
I know q-tec aren't the best, and they dont offer anywhere near their rated wattage, but I don't think they are that bad. It runs my system fine, although I can't really get a stable overclock with it as the rails are too low....
I mean, running a high end system including a pelt off it .. what do you expect ? ;)