That's not too much. Check out the specs of the one Hipro5 is making at XS. He's the one who made the DDR/DDR2 maximizer.
Some update that came into my mind though...
It'll have SEPARATE output voltages and they will be:
a. +12V / 52A - 625Watts normal and 800Watts peak
b. +12V / 52A - 625Watts normal and 800Watts peak
c. +12V / 52A - 625Watts normal and 800Watts peak
d. +12V / 52A - 625Watts normal and 800Watts peak
e. +5V / 100A - 500Watts normal and 640Watts peak
f. +3.3V / 114A - 375Watts normal and 480Watts peak
g. -12V / ~10A - 125Watts normal and 160Watts peak
h. +5V / 25A - 125Watts normal and 160Watts peak
A TOTAL PSU power of 3625Watts NORMAL and 4640Watts PEAK power....
The PSU will be capable of providing these outputs at anytime....
Of course it depends on the toroidal transformers that I'll use.....
For now I'll use a total of 2500VA and in a year or two (who knows) the ONLY thing I will have to do is to change the transformers with 2 x 2000KVA (or more) and I'll be ready.....
Lines a. and b. will be for the VGAs.
Line c. will be for my - many - DELTA fans I use and a spare one.
Lines d. e. f. g. and h. will be for the motherboard/CPU/etc.
The case is ready and it is a U3 rack mount one.
I'll use 2 x DELTAS 12 x 12cm 190cfm each thermally controlled - when the heatsink's temperature raises, the fans will raise their speed and visa-versa...