P6X58D & i7-980x @ 4.3 GHz - Need help pushing further

[Sam_oslo]

Intel recommends absolute max vCore=1.4v for 32nm, but it is a good idea to keep it under 1.375v for 24/7.

Those early BSOD in prime, that vCore increase doesn't help them, are usually related to IMC/Uncore. Usually it needs more VVT for that specific Uncore multi/frequency.

Whatever you do, don't run with VVT=1.6v for 24/7. VVT is a bigger killer/degrader than vCore, and nobody knows the long term effect of high VVT on 32nm yet. Besides, even if it doesn't kill/degrade your chip, it will add a lot of heat to your CPU and VRM. Save those heat for higher OC by reducing the VVT. Try to reduce the Uncore multi/frequency, then you would need less VVT.
Intel recommends max-VVT=1.4v, but try to keep it under 1.34v to secure a long life, and less torture and heat, for your CPU.
What kind of Uncore multi are you using?