So my graphics card (a 7600gt) died (~2 years old, and even though it was EVGA, I never registered it so no lifetime warranty for me!) and the 8800gs looks like a really great deal at about $100 (newegg).

The problem is I have an antec smart power 400 power supply (about a year old). The amps on the 12v rails (according to the ps itself) are 14 and 15 amps respectively. I realize this seems to be different than antec's website? So the question is, is this doable or would I need a new PS also (and if that's the case, I'll probalby have to go with the 8600gts, which sells for around $80).

The rest of the system is as follows:
Socket 939 X2 3800+
1 HD
1 DVD Drive
1 Fan
2 gigs ram (4 sticks)
And that's about it really.

EDIT: According to EVGA's website, a 8800gs requires 22amps on the 12v rails and a 400 watt PS. XFX doesn't seem to display this information (at least as I could find).[b][/b]

Tigerdirect.com is better for system req lists tan Newegg is........this for the 8800GS XFX Alpha Dog edition

"Minimum System Requirements

1GB of system memory
Microsoft Windows Vista -or- Windows XP

CD or DVD-ROM drive

50MB of available hard disk drive space for basic driver installation
425W PCI Express-compliant system power supply with a combined 12V current rating of 28A or more )

PCI Express-compliant motherboard with one vacant PCI Express x16 slot

One 6-pin PCI Express supplementary power connector -or- Two 4-pin Molex supplementary power connectors"

The video card does NOT require 22A itself, they mean for the whole system. You have 14+15 = 29, so you are OK!
For peace of mind, buy a Power Meter, you will find that your system draws less than you expect.

Mike.