Thank you very much Sean
Not meaning to jack your thread too much, but all I am trying to do is run @ 1600Mhz FSB with the DDR3 @ 1333Mhz...it's just unstable without 1.51V on the NB
You are right though, with just 2x2GB I can run 1600Mhz CL7
I have contacted ASUS about this issue as this was the reason I had to RMA for a QX9650 as the 1600Mhz FSB Extreme Edition version did not work because of this very issue.
The Intel board does look nice, just a shame that it is still expensive otherwise I would jump on one.
John