So someone buying a rig for me wanted the ASUS P8Z68 Deluxe instead of the ASUS P8Z77-M Pro with an i5 2500K. The P8Z77-M Pro has a 6-phase design for the CPU while the P8Z68 Deluxe has a 12-phase design. I noticed that redoing the overclocks after I switched the motherboards, that I needed less Vcore to get the same overclock.
ASUS P8Z77-M Pro:
4.9GHz = 1.44V in BIOS
ASUS P8Z68 Deluxe:
4.9GHz = 1.41V in BIOS
5.0GHz = 1.45V in BIOS
So, basically I needed less Vcore (pretty much same exact settings used - where allowed, except the Vcore).
Was this because of the higher power phase design?
I thought the overclocking potential was more for the CPU you got, and not really the motherboard... but maybe the motherboard you have also helps?
If that's the case, then for my 3930K, the Rampage IV Extreme (8-phase CPU) vs the P9X79 Deluxe (16-phase CPU), the cheaper P9X79 Deluxe would theoretically have better overclocking potential than the Rampage IV Extreme? Meaning that instead of 4.8GHz at 1.39V in BIOS, I might be able to get 4.9GHz at 1.4V in BIOS with the Deluxe? Any thoughts?