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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 768

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post #7671 of 9531
Don't have much headroom as temps approach 90C (~88 max). Perhaps it would be better if I decrease Turbo Boost Voltage and increase Offset? What is 'generous' by the way? tongue.gif Double it? Triple it?
post #7672 of 9531
Oh crap, didn't know about the temps. Feels like pretty high temps for your voltage. Well you pretty much can't push it any further than that :| Personally, I wouldn't push it beyond 90 degrees and even then I'd extremely worried about leaving it at that temperature over the course of 24 hours.

Peoples opinions will vary on the subject whether to increase offset and decrease turbo and have a constantly higher voltage overall when on idle or decrease offset and have higher turbo to achiever a lower constant voltage when on idle. Personally, I prefer having a higher offset and lower turbo voltage. That's just the way I went and it worked for me and haven't changed the way I OC since, but I know both methods work.

I suggest you check out this thread:

http://www.overclock.net/t/968053/official-the-sandy-stable-club-guides-voltages-temps-bios-templates-inc-spreadsheet

It contains much more information regarding OCi'ng sandy bridge and there is massive spreadsheet that you can compare your OC, temperatures, voltages and cooling methods of others who have managed to reach their maximum stable overclock. There's also an in depth link in there that explains how to tinker with PLL voltage, VCCIO and VCCSA which is something you need to tinker with when you start to reach the natural limits of your chip, especially when you start getting x124 BSODS all the time.

Finally, those temps sounds really high for what IMO is a relatively low voltage. I'd recommend making sure your heatsink is fitted firmly and all fans and are fanning in the correct direction. Again, inside the link above there will be another regarding PLL voltage which has been shown to reduce temperatures when overclocking.
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post #7673 of 9531
Thank you very much for the in-depth reply smile.gif I'm gonna have a look at it now
post #7674 of 9531
Quote:
Originally Posted by nubki11a View Post

The voltage hovers a bit above 1V. It dipped to 0.992 a couple of times and up to 1.120 aswell.

If I understand you correctly I should've increased the offset instead of the Turbo Boost, as Prime95 didn't really fail on me, I just got x0124 BSOD everytime (note, not related to my temps.).
I'm currently at 4.4Ghz (4.5 GHz resulted in a BSOD after about an hour of prime) with Turbo Boost at +0.105V.

You want to have a low offset to maintain your current idle vcore. If prime 95 fails then increase additional turbo voltage
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post #7675 of 9531
Quote:
Originally Posted by nubki11a View Post

Don't have much headroom as temps approach 90C (~88 max). Perhaps it would be better if I decrease Turbo Boost Voltage and increase Offset? What is 'generous' by the way? tongue.gif Double it? Triple it?

Decreasing turbo and increasing offset is still going to increase your full load vcore. If your temps are too high (which they are IMO) then you need to either decrease the multiplier or get a better CPU cooler.
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post #7676 of 9531
Hmm, I've got a CM 212+ right now, and I've seen people get way higher OC's with it on the 2500k. If I would tinker around with the PLL, VTT etc. it might improve right?
post #7677 of 9531
Quote:
Originally Posted by nubki11a View Post

Hmm, I've got a CM 212+ right now, and I've seen people get way higher OC's with it on the 2500k. If I would tinker around with the PLL, VTT etc. it might improve right?

Lowering PLL might help bring temperatures down, giving you a marginal amount of headroom, but it has been my experience that it is more of something you tweak to help fine tune an overclock rather than get a higher multiplier. VTT is for your RAM, I really have not played with it at all(because I have weakish RAM), but shouldn't affect your CPU overclock unless you are experiencing RAM related instability.

It looks like the quickest way for you get a better overclock is to upgrade your cooler, so long as you have the voltage headroom.
Edited by inedenimadam - 1/6/14 at 10:00am
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post #7678 of 9531
Alright. I cleaned up my entire case and cleared away most of the dust. I also put some new TIM on the heatsink, the old stuff was a little brittle.

The idle temps were about 33C. Then I put a Prime stresstest on to see what my temps under load were. They were a lot lower than before: mostly around 77C, after a while (15 mins) they went up to the lower 80's (84 max). Then, after 24 minutes of stresstesting, I got a x0124... I don't see anything strange in the RealTemp logs so it's not that.

@inedenimadam I haven't had any problems with my RAM afaik... Just the dreaded x0124 BSOD... http://www.overclock.net/t/1120291/solving-fixing-bsod-124-on-sandybridge-read-op-first Suggests that I tinker around with VTT and PLL. Any advice on how to do this and in what direction (increase/decrease)?
post #7679 of 9531
Quote:
Originally Posted by nubki11a View Post

Alright. I cleaned up my entire case and cleared away most of the dust. I also put some new TIM on the heatsink, the old stuff was a little brittle.

The idle temps were about 33C. Then I put a Prime stresstest on to see what my temps under load were. They were a lot lower than before: mostly around 77C, after a while (15 mins) they went up to the lower 80's (84 max). Then, after 24 minutes of stresstesting, I got a x0124... I don't see anything strange in the RealTemp logs so it's not that.

@inedenimadam I haven't had any problems with my RAM afaik... Just the dreaded x0124 BSOD... http://www.overclock.net/t/1120291/solving-fixing-bsod-124-on-sandybridge-read-op-first Suggests that I tinker around with VTT and PLL. Any advice on how to do this and in what direction (increase/decrease)?

x0124 is VCore more often then anything else when overclocking. And if you are crashing with it on the third fft test(from 30-45minutes in), it more than likely is VCore, and messing with VTT and PLL wont do much good, and might cause more issues. However, if you are convinced that you have to tweak them, try going down with PLL, and up with VTT.
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post #7680 of 9531
I put PLL voltage down to 1.709 (as was recommended somewhere else on these forums), I also enabled PLL Overvoltage (not sure anymore why tongue.gif but I think it should help with the stability). So far so good! I've got Prime running for almost an hour now and thus far it has passed all the tests and no BSOD biggrin.gif The Core Voltage is about 1.328, the temperatures confuse me though. Sometimes all cores are at 77C for a while and sometimes 82C, apparently they even hit 86C once. Anyone got an idea why these temperatures fluctuate like that?

If I want to continue overclocking: Increase Tubro Voltage (currently +0.105) or increase Offset (currently +0.05)?

Thanks a lot for the help so far guys

EDIT: Some interesting information regarding PLL Overvoltage from http://hardforum.com/showthread.php?t=1578110:
Quote:
A D2 sample with peak multiplier of 44 with PPL option enabled and corresponding voltage applied we have seen results of a stable 50 multiplier now able to post / boot and be held. ( previously without the PLL value the same CPU would failed to compelte a boot with a any multi exceeding 45 )
In addition to the increase of the multiplier range a “side effect” is additional Vcore needed to compensate for maintained post/boot and stability tests. The new voltage level do not align with standard voltage scaling ( on CPU already able to hit / sustain comparable multipliers.
Example
Generally 4.8GHz stability can be achieved at 1.400 – 1.425 Vcore now with PLL enabled D2 parts exceeding their previous max multiplier the increase in voltage would be 1.425 – 1.450.
It is important to note this option should generally only be used with D2 and retail parts NOT D1 parts.
Your revision (D1 or D2) is shown in CPU-Z. Maybe this explains why PLL Overvoltage helps in only a couple of cases and it is usually low Vcore that causes x0124?
Edited by nubki11a - 1/6/14 at 1:32pm
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