currently my Q9450 @ 3.4ghz is prime 95 stable for 4hrs

cpu vid control 1.3V
dram voltage control 1.803v (DDR3)
SB core 1.510
NB core 1.392
CPU VTT voltage 1.2V
CPU GTL REF VOLT 1/2 90
CPU GTL REF VOLT 0/3 85
NB GTL REF VOLT 80

cant seem to pass post @ 3.5ghz
with 1.32-1.35v cpu voltages. any advice?