All the best to ya, Let us know how it works, It could be that your Hipro is going bad and supplying bad current
I think I have a hipro AT psu laying around that I usse for testing
If it were my system I would get me a nice enermanx 350 watt ( Which is what I have to run my three optical drives, two 60 gig maxtors on my promise controller, My p4 runs cool enough but I have a fan on those hard drives
I hope your idea works