Let's be succicnt here: nVidia <i>PR</i> sucks.
As oer the issue at hand:
<pre>Component Watts Line
AGP card 50 +3.3V
Average PCI card 5 +5V
PCI SCSI controller (cache) 25 +3.3V, +5V
Ultra2 SCSI PCI card 5 +3.3V, +5V
Floppy drive 5 +5V
10/100 NIC 4 +3.3V
Atapi CD/DVD-ROM/RW 25 +5V, +12V
SCSI CD-R/RW 20 +5V, +12V
SCSI CD-ROM 12 +5V, +12V
RAM (per DIMM) 8 +3.3V
7200rpm IDE hard drive 15 +5V, +12V
7200rpm SCSI hard drive 24 +5V, +12V
10,000rpm SCSI hard drive 40 +5V, +12V
Motherboard (plain) 30 +3.3V, +5V
1GHz Pentium III 34 +5V
1.7GHz Pentium 4 (Willamette) 65 +12V
2.0GHz Pentium 4 (Willamette) 76 +12V
1.4GHz AMD Athlon (T-Bird) 70 +12V
2.4GHz Pentium 4 (Northwood) 58 +12V
</pre><p>
Add everything up, add 50%.
By no means a complete list, but it errs towards the safe side.
Dave
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<b><font color=red>Three great virtues of a programmer are: laziness, impatience, and hubris.</font color=red><b>