Let the numbers speaks for themself :)
Opteron 170 @ 3.0GHz Vs. FX57 @ 3.0GHz
300x10.0 , HTT x3.0 for both Opty and FX
Watercooling for CPU (Swiftech Storm + MCP655 + BIP II)
DFI LP UT nF4 SLI-DR Xpert
2x1Gb , 250MHz @ 3.0-4-3-7-1T
GeForce 7900GTX/7900GTX SLI - 650/1600
Win XP Pro SP2 , FW 84.21WHQL
3DMark's and Aquamark3 (ForceWare sett. : Highest performance ) :
http://img266.imageshack.us/img266/4061/060ot.gif
http://img280.imageshack.us/img280/9762/052az.gif
http://img266.imageshack.us/img266/7560/035cz.gif
http://img280.imageshack.us/img280/8884/019cx.gif
http://img182.imageshack.us/img182/6944/am32ye.gif
The only games i found that benefit from from Dual Core (well ... may be Serious Sam 2 will too :) ) :
Driver settings : High Quality , V.Sync=Off , AFx16 - forced , AA - appl. controlled , optimizations - off , Gamma Correct antialiasing - on , Transparrency AA - ON > Supersampling .
http://img158.imageshack.us/img158/5...80x10243rf.gif
http://img158.imageshack.us/img158/1...00x12003kp.gif
http://img100.imageshack.us/img100/7...80x10243at.gif
http://img103.imageshack.us/img103/1...00x12001vg.gif
http://img252.imageshack.us/img252/8...x0afx165ie.gif
http://img101.imageshack.us/img101/2...x4afx167tf.gif
http://img159.imageshack.us/img159/8...x0afx167rr.gif
http://img159.imageshack.us/img159/5...x4afx162xo.gif
http://bellsouthpwp.net/g/o/goorood2...AAx4-AFx16.gif