I wouldn't hold out much hope by the looks of that, I would suggest setting the timings to auto and increasing the MHz by jumps of 25 and testing for stability, set the VDIMM to manufacturers stated max.
you can OC your RAM all you want but you won't see that much of a difference, your FSB is gonna limit your RAM because even if you OC your Q6600 to an FSB of 1333mhz (from the stock 1066mhz) it will still be the bottleneck even if you run your RAM at the stock 800mhz, I would just try to tighten up the timings...