Hello, i have a similar problem... I have an i7 920 and a p6t deluxe and i want to run my ram at 1333 without overclocking so the bclk is 133. I have no problems in memtest (not even at 1600 dram) but i always fail linx unless i run the memory at 1066.

I have all the values in auto in bios. Running 1333 dram the qpi becomes 3.2ghz and the uncore 2.66ghz.

Can you help me with what might be causing the problem?? do i need to up some voltages to work? Changing the qpi clock is it considered a overclock in i7? ...

THANKS!