hi all this is my cfg

QX9650
P5WDH WiFi
Thermaltake Toughpower 750W
X1900 XT
2 GB CORSAIR XMS2 PC8500 CL5
OS VISTA 32bit

i'm using 2504 new bios if someone can tell me all the parameteres to select on BIOS because i'd like to have a stable system with 4.0 Ghz too like some other users here.
Thx a lot!