You shouldnt need that much voltage, i have a E8400 e0 @4ghz with only 1.208V on a p5q-e and 4gig of ram.
if i were you id lower the voltage and test for stability for 30mins of prime 95, if it passes then lower the voltage again test for stability etc... repeat the process until it fails then up the volatge once and test for 8-12 hours.