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P8P67Pro, Intel i5 2500K, reducing VCore?

post #1 of 86
Thread Starter 
Have som problems when overclocking, this is my first time doing this so little noob.

Tests:
4.6Ghz @ 1.36v - BSOD after 90min with prime and I dont want the VCore higher. (but I think it should work here, because 4.5 at 1.32 seems to work)
4.5Ghz @ 1.35v - seems to work fine, still running tests (2hours)
4.5Ghz @ 1.32v - Have run tests 1hour, worked fine.

The temps are ok, from 58-68 aprox in theese settings
In cpu-z the voltage says 1.32? - running it on 1.36 i BIOS - why is that??

So is there anything I can do now or is it just to accept that I cant be able to have the cpu at speed over 4.5 without going further with the Voltage?

If there are possible ways for me to achieve 4.6 with a Vcore under or at 1.35 please give me some tips for things to try out before I give up at this speed. And can you guys confirm that 1.35 is the critical 24/7-voltage? Or is it okay maybe to have 1.38 if I can run 4.7 with that settings?

Thanks!
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post #2 of 86
1.35v should be fine. You should be good if you can keep the vcore at or below 1.38v at load.

And no other real tricks, sorry.. Maybe you can try raising PLL voltage if you get 0x124 errors after some time in prime 95, like up to 1.89v, and this doesn't have a measurable effect on temps....maybe about 1C higher. I have seen 0x124's helped both at idle/light load 124's at 5 ghz from using LLC2, and at lower speeds/voltages where you are borderline stable (e.g. where you get 0x124 error in prime instead of 0x101, which is a serious core freeze if a 101 occurs, and is always due to lack of voltage).
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post #3 of 86
Thread Starter 
yes, I do realize that 1.35 is fine, but I cant get up to 4.6 or 4.7 with that.
If I can reach 4.5 with 1.32v I do think that it is a high gap of Vcore and that it should be enough?

LLC2? Is that "high" as I have now? Or should I go to "ultra high" or "extreme"?
I think that the BSOD says 0x124 (not at home right now so cant check it out)

edit: I see that phase control and duty control is set to extreme on others setup, I have Phase Control on Auto and Duty Control to T.Probe. Maybe changes here can help?

thanks for the help btw!
Edited by Akehage - 5/29/11 at 7:39am
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post #4 of 86
Quote:
Originally Posted by Akehage View Post
yes, I do realize that 1.35 is fine, but I cant get up to 4.6 or 4.7 with that.
If I can reach 4.5 with 1.32v I do think that it is a high gap of Vcore and that it should be enough?

LLC2? Is that "high" as I have now? Or should I go to "ultra high" or "extreme"?
I think that the BSOD says 0x124 (not at home right now so cant check it out)

thanks for the help btw!
Put your LLC on Ultra High, that will yield the best results.

- Your volts read lower in GPU-Z under load due to vdroop (look in to it, it'll make you a better overclocker )

-Where did you get that 1.35v is the critical 24/7-voltage?

- I'd keep pushing up your clock until you reach max stable @ 1.4ish. There's a lot of speculation about what the actual safe 24/7 volts are, I think a max of 1.4v is a safe cap for 24/7 considering Intel's 1.52v limit.
post #5 of 86
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Quote:
Originally Posted by hirolla888 View Post
Put your LLC on Ultra High, that will yield the best results.

- Your volts read lower in GPU-Z under load due to vdroop (look in to it, it'll make you a better overclocker )

-Where did you get that 1.35v is the critical 24/7-voltage?

- I'd keep pushing up your clock until you reach max stable @ 1.4ish. There's a lot of speculation about what the actual safe 24/7 volts are, I think a max of 1.4v is a safe cap for 24/7 considering Intel's 1.52v limit.
- Thanks! Will try Ultra High later!
- I saw that on another site, a guide on clocking, but I have seen that this is an unanswered question so far, and the 1.52 seems to come from someone at the support that didnt know what he was talking about
- With that in mind, that I probably can push it to 1.4, I should make it to 4.7 with that.
- Regarding Vdrop I have read a bit, and the "high" settings was from another board, but I have thought on ultra high instead!
Many thanks!
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post #6 of 86
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I have Noctua NH d-14 and 4 extra powerfans (1450rpm) in the Fractal R3 chassi if that makes difference...temps seems to be fine, so I dont think that it will fail due to that.
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post #7 of 86
Quote:
Originally Posted by Akehage View Post
- Thanks! Will try Ultra High later!
- I saw that on another site, a guide on clocking, but I have seen that this is an unanswered question so far, and the 1.52 seems to come from someone at the support that didnt know what he was talking about
- With that in mind, that I probably can push it to 1.4, I should make it to 4.7 with that.
- Regarding Vdrop I have read a bit, and the "high" settings was from another board, but I have thought on ultra high instead!
Many thanks!
1.52v comes from the Intel thermal specifications white paper. It is a valid voltage ceiling. Depending on what memory you have you may need to up the VCCIO to 1.15-1.20v to get things stable.
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post #8 of 86
Thread Starter 
Okay, that I did not know.
My memory are G.Skill Ripjaws Gaming.
F3-12800CL9D-8GBRL, can you say something more specifik with VCCIO knowing what type I have? I have enterd the 9.9.9.24.2 in the DRAM Trimmings as well.
Edited by Akehage - 5/29/11 at 8:11am
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post #9 of 86
Quote:
Originally Posted by Akehage View Post
Okay, that I did not know.
My memory are G.Skill Ripjaws Gaming.
F3-12800CL9D-8GBRL, can you say something more specifik with VCCIO knowing what type I have? I have enterd the 9.9.9.24.2 in the DRAM Trimmings as well.
You probably won't have to bump the VCCIO with that kit. Although, it really won't hurt anything to do so, and being a 1600 kit you could probably clean that up a bit (i.e. 8-8-8-24 1t) with 1.2v on the VCCIO and 1.56v on the sticks themselves.
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post #10 of 86
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Okay, sorry but I am pretty new with this.
What happends when I put 8.8.8.24.1 instead? Do they go slower or faster with that?
and should I have them on auto or 1600Mhz, or maybe down to 1333Mhz to be sure?
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