Dolphin 2.0 RC1 is lagging

[doom35]

hello all,
yea yea i know that theads like this"OMFG FUCKING DOLPHIN IS LAGGING AS HELL!" BUT i need your help:

how can i get Dolphin run faster.. idk why but its lagging i use the config of renebarahona( this 1 here http://my.dv-8.me/ssage/board/showthread.php?tid=41) and its lagging,
well i say you my system:
Intel i7 920 @ 3.20 GHZ(O.C)
Cooled with Corsair Hydro H50(i saw renebarahonas video and want to buy them )
Asus Rampage II Extreme
Corsair XMS 3 4GB DDR3
WD 1TB CG
Nvidia GTX 260
Corsair 850HX
SuprimeFX Xi-Fi Soundcard

:/ thx for help