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post #91 of 369
Thanks for the replys VonDutch, ive been reading this thread and still dont understan how you got a vcore of 1.2v on load some screen shots and a 1v idle clock.

If i set my rig to offset at 4.2ghz my cpu goes up to 1.34v if i use a negative setting to bring it down to say 1.25 volt i get a idle voltage of 0.850v is there something iam doing wrong ?
post #92 of 369
Quote:
Originally Posted by usoldier View Post

Thanks for the replys VonDutch, ive been reading this thread and still dont understan how you got a vcore of 1.2v on load some screen shots and a 1v idle clock.

If i set my rig to offset at 4.2ghz my cpu goes up to 1.34v if i use a negative setting to bring it down to say 1.25 volt i get a idle voltage of 0.850v is there something iam doing wrong ?

i know, offset can be a bit confusing at first, it was for me anyways..lol smile.gif
let me give it a try to explain how to, in short

1. set the oc you want in bios, 4.2 or higher if you like and if temps permit, use fixed vcore, no offset
2. you have to find your stable oc vcore first, test it..otherwise just using offset will prolly crash anyways..
3. boot to windows, open, core temp, real temp, cpu-z, use ibt/prime/aida64 to load your chip 100% load,
4. run one of the "load" programs, watch the VID in core temp, note the VID
5. do the math, vcore - vid = offset
6. back to bios, plug in the offset from the calculation above
7. reboot, enjoy, you did it ..lol, run some more stability programs smile.gif

this is a example

VID sometimes jumps a bit, as you can see in the note, take the vid that you see most of the time,
this is not the math i showed you above, i already knew my vcore, and only did some other tests at that time,
with using little vdroop, and no vdroop(LLC settings) etc, but you get what i mean i hope..

cpu-z doesnt always show the correct voltages, so keep in mind the vcore you set in the bios for the math

hope this helps smile.gif
Edited by VonDutch - 1/17/13 at 8:14am
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post #93 of 369
Great post VonDutch that was a big help for me to understand this offset OC.

Here are my current Idle and Load screenshots

Idle



Load


Load tested it for 2 hours now my fear is just because of the low idle voltage.

My power consumption using this droped to 62w drawn from the wall with lcd off, and thats together with my Apc ups. Perfect for my ttorrents and my ftp server.

Power saving is a big must have for me atm, with the economy going down like this in Portugal one must try to have the best of 2 worlds.

Thanks for the Help guys.
post #94 of 369


Offset FTW!

BF3 5.0Ghz = 74C max. So i can run 24/7 5.0Ghz.
Edited by JulioCesarSF - 1/25/13 at 3:14pm
post #95 of 369
Quote:
Originally Posted by usoldier View Post

Great post VonDutch that was a big help for me to understand this offset OC.

Here are my current Idle and Load screenshots

Idle



Load


Load tested it for 2 hours now my fear is just because of the low idle voltage.

My power consumption using this droped to 62w drawn from the wall with lcd off, and thats together with my Apc ups. Perfect for my ttorrents and my ftp server.

Power saving is a big must have for me atm, with the economy going down like this in Portugal one must try to have the best of 2 worlds.

Thanks for the Help guys.


LOL we have the some vcore with 4.2. Maybe u can use my table.
post #96 of 369
Quote:
Originally Posted by JulioCesarSF View Post



Offset FTW!

BF3 5.0Ghz = 74C max. So i can run 24/7 5.0Ghz.

Julio, what exactly is Turbo Voltage in your table (+0.008 and +0.012), that you used to surpass 48 to 49 and 50 clocks? I may need this setting in my o/c as moving up past 48 ratio requires a lot of additional voltage in my build (i7 3770k + Maximus V Extreme mobo).

Thanks,
Sabre.
post #97 of 369
Hello,

edit: this only affects OFFSET OVERCLOCKING

In this guide you suggest to enable a very high LLC like High or Very High.

My Experience is that you will need more "LOAD VCORE'' to be stable then.

When the cpu is at 75% load it will pick a "In Between VID", because of the HIGH LLC, this ''IN BETWEEN VCORE, NOT LOAD" will be lower.

--> So it is possible to crash the cpu in 50% to 75% load, because of the high llc it will get a lower voltage.

If you set a LOW LLC, the "In Between VID" will be the same, but because LOW LLC, and HIGH OFFSET, this in between load states has higher voltage and will be stable.


Test it out yourself guys, in the end the IDLE VOLTAGE will be higher, but the LOAD VOLTAGES will be lower, in comparison

So try a low llc with offset and test it yourself wink.gif






TLDR:
HIGH LLC on Offset = Low idle, High load voltages = stable on stress tests

LOW LLC on Offset = High Idle/Middle Loads, In comparison lower Load Voltages. And more stability on 50%-75% load scenarios
Edited by prescotter - 2/13/13 at 2:48am
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post #98 of 369
Quote:
Originally Posted by prescotter View Post

Hello,

edit: this only affects OFFSET OVERCLOCKING

In this guide you suggest to enable a very high LLC like High or Very High.

My Experience is that you will need more "LOAD VCORE'' to be stable then.

When the cpu is at 75% load it will pick a "In Between VID", because of the HIGH LLC, this ''IN BETWEEN VCORE, NOT LOAD" will be lower.

--> So it is possible to crash the cpu in 50% to 75% load, because of the high llc it will get a lower voltage.

If you set a LOW LLC, the "In Between VID" will be the same, but because LOW LLC, and HIGH OFFSET, this in between load states has higher voltage and will be stable.


Test it out yourself guys, in the end the IDLE VOLTAGE will be higher, but the LOAD VOLTAGES will be lower, in comparison

So try a low llc with offset and test it yourself wink.gif






TLDR:
HIGH LLC on Offset = Low idle, High load voltages = stable on stress tests

LOW LLC on Offset = High Idle/Middle Loads, In comparison lower Load Voltages. And more stability on 50%-75% load scenarios

Well, in my case to be stable my load vcore should be higher for lower LLCs compared to higher LLCs. What do you think?
post #99 of 369
Yes indeed,

With HIGH LLC, a ''lower'' offset is needed to achieve same load voltage.

With LOW LLC you need "in comparison to HIGH LLC" a higher offset voltage to get the same 100% Load voltage.



But with a HIGH LLC, the ''In Between Load VID, not the Maximum VID, but the lower VID used with 60%-70%-80% load will get lower voltage.


Because LLC gives ''MORE VOLTAGE'' on higher loads, while with a LOW LLC its not.

My 2500k could be stable with a High LLC, and a Low Offset, but it would crash on Loads like Gaming / Converting Movies.
While it was 100% stable in P95 / IBT.

What i try to say is; If you get 100% load stable in IBT / P95, but crash on Medium/High Loads, You should try a Low LLC with a High Offset


Example of how LLC and the Offset you get on a load:

These are the + Offset voltages, not actual vcore offcourse
LLC LOW: 25% load=+0.100v, 50% load=+0.075v, 100% load =+ 0.025v

LLC HIGH: 25% load=+0.025v 50% load = +0.050v, 100% load = +0.100v

So if you use a Low LLC, with a High Offset voltage, the CPU will get more voltage on a lower load, in comparison to a high LLC.


Sometimes IBT uses 1 VID higher then P95, so the Exact CPU Voltage will vary with load differenes,
But with a low llc, the actual vcore will be closer the the ''maximum vcore'' you will see on a cpu-z..


Yea sorry if it is all very hard to understand, english is not my native language wink.gif
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post #100 of 369
Did you turn off C3 and C6 state? That should prevent the higher LLC settings from crashing the CPU on idle voltage.
C3 and C6 will try to further lower voltage when in idle state to further reduce power requirements. Which when using offset can crash the CPU.
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