What kind of difference would I see in that card and this one? http://www.newegg.com/Product/Product.aspx...N82E16814130086 For only $20 more is it worth it?

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ASUS A8N32-SLI Deluxe
Opteron 165 @ 2.7
1GB Dual-Channel OCZ Platinum DDR400
Corsair HX620 PSU
EVGA 8600 GTS