Thanks guys for the advice!
This is actually part of a new computer I'm building, so I have not yet purchased the power supply or case yet.
I have purchased:
Motherboard: ASUS P5N-EM HDMI (micro ATX, has integrated GeForce 7100 with HDMI and DVI out)
RAM: 2 x 2GB (4GB total) of OCZ DDR2 800
CPU: Intel Core 2 Duo E7300 (2.66 GHz, 3MB cache, Wolfdale 45 nm)
Hard Drive: 250GB Seagate, 7200 rpm
Optical: Plextor 712A DVD writer (pulled from an older computer, but still works great)
I am thus missing the case and power supply.
If I get the eVGA 8800GTX 768MB, I see that the card has a length of 10.5", takes up two PCI slots, and requires 28 A on the 12 volt rail.
That's a pretty power hungry card, as you guys say!
The case I have decided on the ThermalTake Lanbox VF6000BWS as it accepts a full size ATX power supply, can fit the 10.5" video card, and reviews do not seem to indicate any problems with overheating (unlike the Antec NSK1380 box).
In order to power this video card properly, it seems I would need at 500 - 600 watt power supply. However, I am a bit confused on the rail amp ratings. For example, some have two ratings say that they have two 12 volt rails at 18 A each. Since the 8800GTX requires two 6-pin PCI-E connectors, does this mean the power supply can supply 36 A to the card?
If I set a budget of about $75-$100 for the power supply, which is the best?
Thanks for answering my question and any advice on my configuration!!!!!