Lactose_Intolerant
Member
I currently have my i7-6700K overclocked to 4.5Ghz using 1.35V. I started off at 1.30V and did a 10 minute Prime 95 test up to 4.4Ghz which ran without issue. Once I set it to 4.5Ghz it crashed so I increased the voltage by 0.05 each time until I got to 1.35V. At 4.5Ghz/1.35V it's stable under Prime 95 for 1 hour, Aida64 Extreme for 1 hour, 30 minutes of x264, countless Firestrike runs, and all my games have been running fine for a couple weeks now.
I've seen a lot of people say they get 4.6 or higher but with lower voltage so I thought I must have done it wrong! This is my first time overclocking a CPU. So I reset my motherboard (MSI Z170A G43 Plus) and tried again yesterday while leaving my RAM at 2400/1.2V (was 2933/1.35V). 4.6Ghz at 1.35V ran under Aida64 for about 15 minutes but instantly crashed in x264. I was unsure about going over 1.35V as I've read I shouldn't get near 1.4V so I tried going up by 0.25 to 1.375 but the numbers I input turned red so I guess my motherboard is warning me about using that much. I tried 1.36 but again it turned red. 1.355 is the highest it will go and stay white.
So I think I'm pretty much stuck at 4.5Ghz/1.35V. Being realistic an extra 0.1Ghz isn't going to make a huge difference and isn't worth it really but I guess I'm just a little disappointed. Did I just get unlucky in the "silicon lottery"?
Try doing some research on LLC, Loadline Calibration. You might need to adjust this. Even setting the voltage to 1.35, under load it can fluctuate down to like 1.32. It is called Vdroop.
That can be one reason for your problems. I also wouldn't go over 1.35 on air but that's just me.
My 6700k does 4.5Ghz at 1.32v under load.