I'm trying to reapply my stock-voltage OC on my 2500k. I recently changed out the motherboard from an MSI P67a-G45 to an ASRock Z77 Pro4-M.
With my P67, overclocking was very straight forward: disable Turbo, set voltage, set multiplier, Boom! With that said, I had a 4GHz OC at 1.2V, which I was quite happy with, especially since it passed 20 hours of Prime.
With this Z77 board, the voltage is way out of whack. No matter which voltage I manually set (which isn't straight forward - everything is turbo and offsets; I offset the voltage by the smallest margin possible), whenever I set to 4GHz, the mobo applies ludicrous voltage. I've seen it spike to 1.4V within seconds on running prime despite my every effort to manually set the voltage to something reasonable.
Please help. I just want my 4GHz @ 1.2V.
Initial guess would be Load Line Calibration, although from 1.2 to 1.4 is on the extreme side of that.
I had that set to 0%. Still spiked. I ended up assuming the default voltage was incorrect so I have set a -0.14V offset. Now now I'm running 4GHz @ 1.235V. If I go any lower, then my system becomes unstable at idle, which is rather amusing. I initially set a -0.165 offset, but it would boot. I set it to -0.15 and it booted fine, but once everything loaded, BSOD. I suppose the only thing to do with a slight voltage bump is to OC MOAR!!!!
On a side note, I think my temps seem just a tad high, but it's hard to gauge without ambient temp. I've traditionally used air coolers taking ambient from a fan intake temp sensor on my fan controller, but I switched to a dual 120mm all-in-one, CM Seidon 240M, and the carbide 240 air doesn't have room for that. My temps are about 60c with the fan @ 800rpm