I set mine at 1.325 at the highest so far. And I am running at 4.05ghz right now. I could go higher, but my stupid motherboard wont let me unlink the fsb:dram.. so I can only go as high as my ram will. and tonight that was 4.176, but 3dmark had an error everytime I tried. so later I will put in my gskill, and push the voltage way up, see if i can get a little more outta the ram