Kevin, I have the same setup except I have D0 stepping and ATI 4850 in crossfire. The OCZ Gold memory OCZ3X1600LV6GK is XTC I see no reference to XMP with mine. All I did with my setup is set tweaker to manual, the memory in bios to 8-8-8-24 and 1.64V. I am Overclocked to 4.0 with ram at 1600. Most bios settings are auto except 1.25V cpu, 1603 ram and 200 bus speed. So without any tweaking out of the box it ran fine 100% stable. I did update bios to 504. My G15 V1 keyboard needed the full speed setting to work at bootup. I hope Asus fixes that issue as I do have some high speed devices.