My Main System:
mobo:MSI K7N2 Delta-L
Cpu:AMD Athlon XP3200+
Video:Geforce 6200 256mb agp non turboCache
Ram:2x(512mb)Crucial PC3200
Hard drive:160Gb Seagate Barracuda
HSF:Akasa led cpu fan

My Second System:
Mobo:Asus P5P800
Cpu:Intel Celeron D 2.8Ghz
Ram:1X512mb PC 2700
Video:Geforce MX440
Maxtor 60Gb Hard Drive
HSF:thermaltake Silent 775 CL-P0092
Both systems would be well served by OCZ PowerStream 420W's @ about $80 each.

The PC P&C 850W must be heavily loaded to work properly &
that is almost impossible without dual CPU's & 10X HDD's!

Anyone recommending an Ultra PSU should be put to a slow & very painful death!