As you can see from the above chart the 2900XT uses about 30w more than the 8800GTX. This does not come as a surprise since over the past several years ATI cards have used more power than their nVidia counterparts.
Wow that's crazy then.. really I don't know what to think. I can get the 2900XT for half off MSRP because my friend works at ATI, but I'm not sure I want it for less performance at higher power needs and louder card.
I'd deffinetely get it at half price. I guess that's not sayin much since I got it at full price though Mine is actually more quite than the x1800xt I was using. Both are sapphire cards. I don't think the power usage is that big of an issue if you got the psu to support it. What's a few more bucks a month? I kinda am a fan of ati but I have an nvidia card in my second spare part computer. I might have bought an nvidia card if I didn't need to buy a new motherboard and reinstall my OS's and everything along with it.