I got my XFX to boot at 400x9 with Q6600. Only problem it will only boot at this, or even be stable at this, only with one ram stick. I tried planning with voltages but still wont be stable with two sticks. I have the good Buffalo Firestix ddr800. The system is perfectly stable at 400x9 with one stick running 4 seti@home boinc.
Thanks