That makes sense. My q6600 can get to 3.3ghz (9 x 370) but it needs 1.31v in bios and memory voltage must be raised o 2.05. I chose to go with 400fsb x 8 (3.2ghz), 1:1 ratio, 1.2875v in bios and 1.95v for ram (4,4,4,12 timings).
It passed OCCT 30' stress test with core 1, 2, 3, 4 highest at 57...