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P8P67Pro, Intel i5 2500K, reducing VCore? - Page 8

post #71 of 86
Thread Starter 
@cba1986. Yep, I have LLC on ultra high, and the HT is not an option for me, I have the 2500K.

@Falkentyne, I enabled C3 and C6 and the jump from 1.6-4.7Mhz is still there. I know that it wasnt like this before. So must be some kind of bug, maybe with the new BIOS-version?
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post #72 of 86
@Akehage Thanks for answering.

@Falkentyne How is possible for some people to have suchs overclock at such lower voltages?
In my case i have to use 1.35 to have my 4.5 stabe with HT on. I now that disabling Ht allow to lower the voltage at the same frequency.
In realtemp the VID for my chip at 4.5 is 1.3511 the same with 4.6.
What are your settings?
post #73 of 86
Quote:
Originally Posted by cba1986 View Post
@Akehage Thanks for answering.

@Falkentyne How is possible for some people to have suchs overclock at such lower voltages?
In my case i have to use 1.35 to have my 4.5 stabe with HT on. I now that disabling Ht allow to lower the voltage at the same frequency.
In realtemp the VID for my chip at 4.5 is 1.3511 the same with 4.6.
What are your settings?
its all based on luck of the draw with CPUs and it also depends what motherboard you have.
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post #74 of 86
Thread Starter 
yep, there is thoose lucky bastards out there!! Damn you all!
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post #75 of 86
Akehage +1
i wish i could have 4.8 at 1.325 like Compudaze or you DaXxJaPxX . Can the MOBO or PSU make the diff?
I don't really think that temps makes a diff, me at 4.8 at 1.40 i barely reach 71.
oh well if i can mantein 4.5 at 1,35 qith HT on i'm a happy camper.

Quick question to 2600k user.
Have you disabled HT to OC?
post #76 of 86
Quote:
Originally Posted by cba1986 View Post
@Akehage Thanks for answering.

@Falkentyne How is possible for some people to have suchs overclock at such lower voltages?
In my case i have to use 1.35 to have my 4.5 stabe with HT on. I now that disabling Ht allow to lower the voltage at the same frequency.
In realtemp the VID for my chip at 4.5 is 1.3511 the same with 4.6.
What are your settings?
It depends on the default VID of the chip, with some variances.
Lower VID cpu's run hotter and respond better to volts (meaning they run on lower vcore).

Usually the indicator is the default VID at 3.4 ghz, not at 4.5 or higher speeds. Lower VID the better. However this isnt a firm rule, and an even better rule is the higher the multiplier / mhz that the chip will work at with PLL overvoltage disabled, the better clocker it will be, regardless of VID (I could be wrong).

I'm not using that chip but all I remember is, for the better of the two chips, default VID at 3.4 ghz was 1.215v and at 5 ghz was 1.3711v. I'm using the higher vid one that needs a lot more volts. Not gonna swap just to check the vid at 4.5 ghz...

What is your vcore at full load at 4.5 ghz, though? Not the bios setting.
Cuz on my bad 2600k (that needs 1.5v for 5 ghz), the VID at 4.5 ghz is 1.37v. (5 ghz is 1.39v vid) Pretty sure the vid on my better one was under 1.35v at 4.5...
Edited by Falkentyne - 6/4/11 at 2:21pm
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post #77 of 86
Quote:
Originally Posted by Falkentyne View Post
It depends on the default VID of the chip, with some variances.
Lower VID cpu's run hotter and respond better to volts (meaning they run on lower vcore).

Usually the indicator is the default VID at 3.4 ghz, not at 4.5 or higher speeds. Lower VID the better. However this isnt a firm rule, and an even better rule is the higher the multiplier / mhz that the chip will work at with PLL overvoltage disabled, the better clocker it will be, regardless of VID (I could be wrong).

I'm not using that chip but all I remember is, for the better of the two chips, default VID at 3.4 ghz was 1.215v and at 5 ghz was 1.3711v. I'm using the higher vid one that needs a lot more volts. Not gonna swap just to check the vid at 4.5 ghz...

What is your vcore at full load at 4.5 ghz, though? Not the bios setting.
Cuz on my bad 2600k (that needs 1.5v for 5 ghz), the VID at 4.5 ghz is 1.37v. (5 ghz is 1.39v vid) Pretty sure the vid on my better one was under 1.35v at 4.5...
At 4.5 with a fixed Vcore of 1.35. Under load i get 1.336. LLC set on Ultrahigh.
Right now i look that the VID at 3.4 is 1.2410. And the voltage under load is 1.176. At default settings. with no fixed voltages.
I know that my chip is average OC. But considering the few cases that can reach 4.6 at <1.35. I'm not complaining.

Almost forgot: i down PLL voltages at 1.7625

Side note: i never raise vcore for more than 1.400. at 4.7 for blend for about 30 minutes. and then go back 1.36 4.6, So i don't think that deagradation kicked in.

What are you setting?
Edited by cba1986 - 6/4/11 at 4:34pm
post #78 of 86
Yeah that's a high VID for 3.4 That's why you need so much voltage. Higher than my bad 2600k.
I guess that's the only reason my degraded one can do about the same vcore at 4.5 as yours does.

The VID on this one is 1.235v at 3.4
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post #79 of 86
Do you think that 0.006 volts in VID traduce into 0.07-0.08 on vcore diff when OC at the same frequency?
Because if i leave everything in stock values (max 3.4 in offset vcore) my chip barely reach 1.17 on load.
The far as i know, there is no way that my chip is "that" degraded. I didn't even aproach 4.8 or 1.4 vcore The heaviest test i did was prime for half and hour at 4.7 with a vcore of 1.384.
I only use my Pc between 4 and 6 hours per day doing low stressing stuff.

Are you counting the vcore after vdroop or the settings in BIOS?
What is your vcore, LLC settings on BIOS on your "good" 2600k?
Edited by cba1986 - 6/5/11 at 6:47pm
post #80 of 86
Quote:
Originally Posted by cba1986 View Post
Akehage +1
i wish i could have 4.8 at 1.325 like Compudaze or you DaXxJaPxX . Can the MOBO or PSU make the diff?
I don't really think that temps makes a diff, me at 4.8 at 1.40 i barely reach 71.
oh well if i can mantein 4.5 at 1,35 qith HT on i'm a happy camper.

Quick question to 2600k user.
Have you disabled HT to OC?
I've got no physical proof, just a lot of reading, and have heard people say that a better mobo can make the difference in power requirements, so my answer is a maybe, lol.

Yea its cool to be 4.8 GHz @1.32, but if your runnin 4.5 at a solid vcore with good temps, really no difference, especially in gaming. I got an extra 1 FPS in unigine from 4.5 to 4.8 lol. After playing around with the OC on the i5 2500k, i feel like you see greatly dimished returns above 4.5.
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