How good of a card can I get without upgrading my PSU?

here is a link to my PSU (sorry its messed up, < 5 posts :()

qqq.newegg.com/Product/Product.aspx?Item=N82E16817128005

if you cant figure that out, its 480 watts with:

+3.3@28A,
+5V@32A,
+12V1@18A,
+12V2@16A,
[email protected],
+ [email protected]

the video card i would like but am not sure if this psu has enough power: newegg product ID: N82E16814130376
its a 9800GTX

am i okay with that video card, or do i need to step down to a 8800 or less?

thanks for the help
 
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