Hello XS-ers,

This is my first post here and I have a bit of an issue with this board.

P5Q-Dlx BIOS 1201
Q9550
Corsair 2x2 GB @ 800 CL4
Powercolor HD 4870
2x WD 6400AAKS in RAID0 on ICH10R

The problem is that the system is not stable at stock freqs. I have to go to 8.5x400 and DDR-800 to find rock-solid stability in IntelBurnTest, OCCT, Everest, etc. It doesn't seem to be voltage-related, because I am at 3.4 GHz with 1.13... vcore and 1.10 vNB, less than what Auto sets. I suspected the board is only stable at 1:1 ratio, but it's not stable at 333 an DRAM-667. Tried all the straps but that doesn't seem to make any difference. What do you think might be the problem ?