Is the Antec Earthwatts 500W enough?

[Song]

So, since the review said the Antec Earthwatts 500W can run two 8800 GTS' in SLI mode, do you think it would be able to run an 2900xt? (2900pro is the card I'm really looking forwards to at the moment)
My setup - E6750 Core 2 Duo (stock fan)
P5K Vanilla
2 gigs hp2 mushkin ddr2
2 120mm case fans
1 HDD, 200 gb IDE
1 Sata DVD writer
Antec Sonata III with the Antec Earthwatts 500W

Thank you.

*reposted this onto here, because it seems more suitable*

[SKYMTL]

You should read the "disclaimer"

Because of processor limitation, 8800GTS cards in SLI are seriously bottlenecked in Company of Heroes. Thus, while they still drew quite a high amount of power, when coupled with a higher end system or playing at higher resolutions they would probably draw much more.

One way or another, I would NOT recommend anything under a good 700W power supply for a pair of 8800GTS cards. These tests are done as benchmarks ONLY.

But in all reality, I think you would be fine for the Pro version but the XT version...well, you will be pushing it just a tad.

[cyclo]

I can't remember where I found this link but it is very helpful / accurate in figuring out the size of the PSU you need:

eXtreme Power Supply Calculator Lite v2.5

[Kandorf]

Very cool link. :)

[enaberif]

I would take most of thoes psu calculators with a grain of salt

[SKYMTL]

Very inaccurate link.

[Song]

ON the site listed above, what is the "Additional PCI Express Cards:
Exclude Video Card(s) from this list." Even though it says to exclude the video card, I would like to make sure.
So... even though the 2900pro( only xt availible on the site ) is in the pci express x16 slot. The additional pci express slots should be set to none?

[Drew]

Would easily handle a 2900XT or Pro.