Originally Posted by twisted_58
don't think you need that much spp v for 3.4GHz. try kicking the vcore up a couple notches and try upping the fsb v a notch. i didn't need that much spp till i was working on 4GHz.
you can also try tweaking your gtlref v lanes to get stable. here is a link all about them. pizzaman posted it a page back.
It really depends on the board. Boards are like CPUs, some OC better then others. I'm currantly at 3.375Ghz 1500QDR and I need 1.5v SPP. The wierd thing is that SPP never goes above 56C according to Everest Ultimate. Though, I've come to the conculsion that I have a bum board. When I had my e8400 the board refused to post above 1859. Seems the 1866 strap is broken or something. Upgraded to the FTW BIOS and still no luck. Gonna disable two cores and try again after more GTL twaeking.
I'm stopping here at 3.375Ghz and 1500QDR for a bit and I'm going to scan the GTL lanes again, this time one lane at a time, then try pushing further again. As noted in the EVGA thread, the GTL area gets smaller as you increase the FSB. So 50 on all four lanes might work for a while, but at some point more tweaking is needed.
Here are my settings so far:
1500QDR 9 multi 3.375Ghz
vCore 1.376v (CPUz with no vdroop) Been able to keep it pretty low so far.
MCH 1.6v (just set it there, could be lower)
PLL 1.6v (not really sure about PLL as it's new after the BIOS upgrade. default is 1.5v)
lane 0 +50
lane 1 +50
lane 2 +50
lane 3 +50