I'm having trouble with my Striker II Extreme bios. For some reason some of the oc settings were locked and updating to 0703 didn't help . When I "updated" to 0602 some of the options were unlocked but not all of them. Which bios version works best?

Currently I have Q9450 @ 3,5Ghz easily. My goal is that I could run 3DMark06 or at least SuperPI with 4Ghz. What kind of bios settings would you recomend to get it stable?

I also have 1600Mhz 2x2Gb 1,8 V. Do they need changes?