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***Official Ivybridge Overclock Thread***

Samsung Green + Ivys = :)

been tweaking mine more today - below is on 1.56V - 16GB

samsung.png
 
My Greens seem to need 1.625V for 2000MHz 8-10-10-21 114 CR1. 3570k needs 1.27V for 4.5GHz. Haven't touched the IMC voltage yet just VTT to 1.1V.
 
Testing for 4.7Ghz now, just passed IBT 30 passes 1.330v highest temp 94c now onto solid folding for a weeks to test for stability. Might reset to 4.5Ghz though once I find 4.7 stable.

What vcore do you guys use for a stable 4.7?

Also why do people mess with the VTT and PLL? What's the point of that? I've just got mine on normal/auto and it seems fine IMC to the lowest though (0.715v) with igpu disabled otherwise my temps go north of 100c,
 
IBT 94c? You are mad, I only use Prime95 now, IBT is scary. People mess with the VTT to stabilize ram I think, and PLL to try to lower it and get better temps but tbh it didn't make a difference, probably ideal for people running at stock because can lower to 1.5V without problems. IGPU doesn't make a difference either but I disabled because it is useless for me.
 
IBT is good to get a quick handle on your maximum temps, but 30 passes? ouch. It puts far too much stress on the cpu and will do more harm than good. I wouldn't go above 85c IBT at the extreme end. I've got my overclock hitting 75c in IBT and that's where I'm happy.

Lower PLL supposedly lowers maximum temps, but I don't see more than a margin of error difference.

VTT needs increasing if you run higher speed memory.
 
Anyone reccomend any decent guides for oc'ing ib cpu's. Spec is.

3570k
asus p8 z77 v pro
8gb corsair vengeance lp

So far, ive only tried the windows turbo v utility for a quick 4.2ghz oc, vcore under load of 1.244v, temps maxing at 62c under p95. Cooling is an Alpenfohn k2.
 
Well still tweaking it, managing to lower the vcore slightly but nothing to be impressed with. Currently at 1.336v and it seems prime stable, temps don't go above 78 degrees with my fans & pump turned down.
 
setter said:
Anyone reccomend any decent guides for oc'ing ib cpu's. Spec is.

3570k
asus p8 z77 v pro
8gb corsair vengeance lp

So far, ive only tried the windows turbo v utility for a quick 4.2ghz oc, vcore under load of 1.244v, temps maxing at 62c under p95. Cooling is an Alpenfohn k2.
Click to expand...

Just use this thread mate. That vcore a bit high for 4.2Ghz im @ 1.165v same 4.2Ghz
 
Yep, i suspected that it would be a bit high. Windows based utilities have a habit of setting high levels. Ill have a good read through this thread and google a bit on my particular board. Not new to oc'ing, but the various settings are a little different from my old x58 setup.
 
I built an IB system last week and have settled on 4.4 Ghz, 1.2v vcore as my 24/7 overclock. Idle temps are typically around 27, under prime they max out on the hottest core at 78 with my fan in silent mode. I'm sure I could knock a few degrees off by removing the silent adapter but don't see the point really.

I'd planned to use dynamic vcore for my overclock but in practice it doesn't seem to function as I wanted it to (4.4 @ 1.2v when under load then dropping to 1.6 @ 0.9v when not being stressed). The dynamic vcore setting (I think it's DVID on this board) only becomes selectable when I set the vcore to 'normal' which locks it at 1.15v meaning that would be my power saving voltage rather than the desired 0.9v. Think I'll just leave it at a 4.4GHz, 1.2v constant clock for the time being.
 
I seem to be getting the same temps on my 4.7Ghz (1.33v) as I did when I had it on 4.5Ghz @ 1.280v

j0uXm.png


Temps only get into the 70c when I've got my GPU under some kind of load playing games. Just using an antec 620 with an extra £3 ebay fan as a push/pull setup.

Note these aren't max temps on prime/ibt, just 100% folding load all day.
 
Last edited:
sadbuttrue said:
IBT is good to get a quick handle on your maximum temps, but 30 passes? ouch. It puts far too much stress on the cpu and will do more harm than good. I wouldn't go above 85c IBT at the extreme end. I've got my overclock hitting 75c in IBT and that's where I'm happy.
Click to expand...

False, it's just hotter, not damaging in any way. 10-100 passes with max memory (without paging) is one of the best (the best IMO) stability tests out there.
 
Mmm, I was thinking about trying 4.7-4.8GHz, but not sure if it's going to decrease the life of my chip? Can't afford to replace the chip for many years now as I want to go to uni next year...
 
Folding at home isn't anywhere near as stressful as a proper stress tester. You may want to see if its actually stable with a proper program matey.
 
-Mike- said:
Folding at home isn't anywhere near as stressful as a proper stress tester. You may want to see if its actually stable with a proper program matey.
Click to expand...

Already been stressed initially with IBT max memory. Folding for a week is a true test of stability and I only posted the pics to show the temps are similar to what I'm getting on 4.5, after two weeks or so I'll know if I'm stable, which I probably am at these high volts.

I've ran prime for 14 hours on my old amd phenom then started to fold the next day and it blue screened within 20 minutes. Same with this chip. After 2 days of solid folding (doing something useful I might add) I got a blue screen and a whea error after something like 60 hours of non-stop folding. you can pass IBT/prime for 24 hours but if you can't fold 24/7 your OC is useless.
 
Out of interest would a memory issue effect an overclock? For example, if one of my memory sticks wasn't as good as the others or had a fault, would the result be that I need more CPU voltage to overcome this issue? Probably a daft question
 
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