[Solved] Vcore on i72600k @ 4.6Ghz

Hello everyone,
I'm new to the forums and am having trouble when I overclock my CPU to 4.6ghz.

My build is :

Coolermaster 212 evo
i7 2600k
2 4gb corsair vengeance RAM
750W PSU
Asus p8z68 -v lx mobo


I get around 1.4 vcore when I run stress test with CPU clocked at 4.6 ghz when I read that usually it should not exceed 1.35. I am also having difficulty with the offsets for the CPU voltage so right now it's on auto. Also my board does not have the section with DIGI + vrm and the only available options for LLC are auto/enabled/disabled.

Any help is appreciated thanks!

Try disabled for LLC, then try enabled, you should get a more solid Vcore with it disabled and let you find a general voltage you need for your overclock, once you find it you can play more with finding something lower. If you don't need Hyper threading you can disable that and it should allow you to lower the voltage some more.

Try manual voltage first. Let's say 1.3v. Then try upping ur multi starting with 40. Go till it crashes. Then raise voltage a bit, see if it boots. Work ur way up till u get stable boot.

Actually with offset it's more stable under load.

I also wanted to use fixed voltage however my asus p8z68 -v lx motherboard only allows me to change the voltage through offsets.

I just disabled my LLC and PLL overvolt settings and ran a prime95 test but got BSOD at 1.38v. Is there any other settings that I'm missing?

Try PLL overvolt off and turn on LLC. if your chip isn't stable at 1.38 at that speed you either have a very picky chip or it's too high a voltage. have you tried disabling hyper threading?

Had work distractions lol

Ok I just disabled PLL overvolt and enabled LLC. My LLC only has 3 options: auto, enabled, disabled. I thought the point of getting an i7 is to have that feature of hyper threading? Sorry I'm still a novice at CPUs and overclocking. Thanks for the help so far guys. Oh yea my offset is at + 0.085 right now if that information is relevant.

keep it enabled and try a lower offset. find the lowest stable offset below 1.35v underload. I was just suggesting disabling HT to test It's easier sometimes to find stable settings with it off, then once you have those stable settings you should be able to do a tweak or two to get it stable with it enabled.

You may be at work also mad, but i'm stuck on a crappy dell optiplex 740 haha

Ok so far I've disabled PPL overvolt, enabled LLC, disabled hyperthreading, and did an offset of - 0.015 and when I run stress test I get vcore 1.35v underload . Does that offset look about right? Is every cpu's auto voltage different? And based on that, we offset it either + or - to the vcore that we want underload? Btw, thanks omega and mad for helping me!

No problem. Now try manual voltage and lower it as much as possible. Then switch to appropriate offset

I have it on auto. C3 and c6 need to be disabled of you have problems booting

Some don't need it disabled but it keeps the cores from going in a sleep state and helps with stability. Shouldn't be an issue but I've always turned it off and I think most OC guides suggest it but haven't looked.

What is ur clock?

Are you running blend? If so then maybe could be RAM.

I am currently using this 2x of this RAM: http://www.corsair.com/memory-by-p [...] 600c9.html

If that doesn't work try increasing ram voltage a bit.

Don't go over 1.65, but if you can try 1.55

When I lower the RAM speed from 1600 to 1333, I get BSOD. What does that mean?

mine is perfectly stable at 1600 and 4.7 Ghz.

My VCCIO voltage says 1.050V auto
DRAM voltage is 1.5V
PCH voltage is 1.050V auto
LLC enabled
CPU spread Spectrum disabled

It's on auto

So if u try manual voltage at 1.3 and 4.6gh what happens?

When i turned off XMP and disabled c6 and c3 it boots up fine but I still get an error while running prime95. 1.352v-1.36. I'm running mem test now. Will get back to you guys in a couple of hours.

Alright, hope the memtest sheds some light on this. when you stressed the cpu try small instead of blend to avoid doing much ram, that should help leave out the ram as a possible instability.