I have a P5B Dlx and a Q9450 and can't have it working.
I have tried everithyng. I have 3 KITS 2X2GB of RAM:
Gskill 8000 PQ
Corsair 6400C5DHX
Team Group 800Mhz

I have up the Vcore to 1,4. In load it drops to 1,3x.
I have tried different settings in everything else with no go.
I'm using BIOS 1226 because it is the only BIOS that seems to have compatibility with this CPU although wen the PC starts i must press F1 because I have a message that says that I need another BIOS to have the full power of the CPU.

I don't have BSOD. It shutdown without BSOD.

Has anyone a Q9450 on a P5B Dlx working?
What setup do you have to run without problems?

Thanks in advance.