I just received my Asus A8N-SLI Deluxe 2 days ago and have the user guide from front to back. Hopefully this information on power supply requirements will help those who are having a hard time choosing the appropiate ps. I went with the OCZ Powerstream 520W and happy that I did. The heavy usage example is pretty intense. I don't think I will have a rig that stacked.
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Components / Peripherals Heavy Normal Light
AMD K8 939-pin CPU type Athlon 64 FX-55 Athlon 64 3800+ Athlon 64 3400+
PCIe x16 graphics cards 6800 Ultra x2 6800GT x2 6600GT x2
DDR DIMMS 4 2 2
HDD 4 2 2
Optical drive (DVD/CD-RW) 2 2 1
PCIe x1 card 1 0 0
PCI cards 3 2 1
IEEE 1394 devices 1 0 0
USB devices 6 4 3
Required +12V current > 25A > 20A > 17A
Required wattage >= 500W >= 400W >= 350W
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Components / Peripherals Heavy Normal Light
AMD K8 939-pin CPU type Athlon 64 FX-55 Athlon 64 3800+ Athlon 64 3400+
PCIe x16 graphics cards 6800 Ultra x2 6800GT x2 6600GT x2
DDR DIMMS 4 2 2
HDD 4 2 2
Optical drive (DVD/CD-RW) 2 2 1
PCIe x1 card 1 0 0
PCI cards 3 2 1
IEEE 1394 devices 1 0 0
USB devices 6 4 3
Required +12V current > 25A > 20A > 17A
Required wattage >= 500W >= 400W >= 350W
