You didn't put the computer. You just linked to the GPU twice.
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That's quite a bit to pay for a 9800, which are becoming outdated.
Are you sure that computer has a PSU that can output 450watts?
I'm buying a new PSU as well.http://www.newegg.com/Product/Product.aspx?Item=N82E16817341022
Don't pay that much for a 550w cpu. For that price you could get a decent 600-700w.Eatit: http://www.newegg.com/Product/Product.aspx?Item=N82E16817182191