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Help me OC 3930K please..

post #1 of 10
Thread Starter 
Hi

First time OCing so im sorry for any noob questions.

My spec is as followed..
i7 3930K
Noctua D14
Asus P9X79 Pro
16GB G.Skill Ripjaws Z 1600MHz
GTX 680 SLI
Seasonic 850W Gold

Now my goals are
1) to have 4.5GHz stable
2) with about 80C on full load
3) keep vcore under 1.4

..so I setup my bios exactly the same as this guide here http://rog.asus.com/forum/showthread.php?9247-BIOS-Screensots-of-Stable-4.6-Overclock-P9X79-Pro
But there is some parts that I made an adjustment which are..

- Multiplier is 45 rather than 46
- Using "Offset" mode on vcore with +0.025 rather than 0.05
- LLC is "medium" rather than "high"

And this is the result with Prime95 1 hour run
- 90C is highest temp
- vcore shown in CPU-Z "1.46"

Now, as you can see, CPU temp and vcore is too high so should I use manual vcore instead and start from 1.30?
Is there anything else you would recommend to adjust to suit my system better?

Thanks
post #2 of 10
First time poster here, also looking for threads and topics on the 3930K.

I have had mine for a few days (upgrade from old E8400!). I'm am at 4.8GHz now quite comfortably.

The C2 revisions seem a lot better than the C0/1s that were going around early. So you should check that. If you have a C2, the guides you're likely to see are based on the older revisions, which don't seem to be as good overclockers.

And you should be careful when copying some other guys BIOS settings. Best to start small and work out what each setting does, and increment slowly. Takes time and patience, but seems to be the best way to go.

I'm using "manual" vcore settings, but I intend to play with the "offset" method. I can suggest finding out what vcore you need for your max clock using "manual" vcore. Once you find it, then play with the "offset" choices to get your vcore to your manual voltage.
post #3 of 10
Change your LLC to high, and see what your voltage under load is after that.

Then, if your load voltage is still too high reduce the offset vcore. Set it to "-a negative offset if you need to to be able to get the voltage you want. Also you are going to want to DISABLE your C3/C6 states while using offset mode and ENABLE them while using manual mode, so in your case you need to disable them. Those options can be found in the advanced section.


Some more things to note:

Set CPU Current Capability to 140%
Set CPU Phase/Duty Control to Extreme mode.
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post #4 of 10
Thread Starter 
Quote:
Originally Posted by iinversion View Post

Change your LLC to high, and see what your voltage under load is after that.
Then, if your load voltage is still too high reduce the offset vcore. Set it to "-a negative offset if you need to to be able to get the voltage you want. Also you are going to want to DISABLE your C3/C6 states while using offset mode and ENABLE them while using manual mode, so in your case you need to disable them. Those options can be found in the advanced section.
Some more things to note:
Set CPU Current Capability to 140%
Set CPU Phase/Duty Control to Extreme mode.

What would you prefer between Manual and Offset? Most people recommend Manual as Offset yield little to no benefit in power-saving :/

I ask that because I think I've found the good spot for manual vcore which is 1.32 @78C full load
Edited by ChozinOne - 5/12/12 at 1:12am
post #5 of 10
Quote:
Originally Posted by ChozinOne View Post

What would you prefer between Manual and Offset? Most people recommend Manual as Offset yield little to no benefit in power-saving :/
I ask that because I think I've found the good spot for manual vcore which is 1.32 @78C full load

I use offset when given the option. It doesn't hurt your performance at all and if aren't lazy to figure out what the offset needs to be set to to get your desired voltage then I don't see why you wouldn't. Power savings is power savings.. especially for me since my computer is on 24/7, but doesn't really matter much since it's always under load and never has a chance to power save lol.

Also be sure those C3/C6 states are set properly in correspondence with manual/offset, if you don't you may end up with random BSOD 124's which can be due to setting those states wrong.
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post #6 of 10
Thread Starter 
Ok vcore is manual as I mentioned earlier.

C1E - Enable
C3 Report - From "Auto" to Enable
C6 Report - From "Auto" to Enable
C7 Report - Leave it "Auto"???

And can you explain more on..
Set CPU Current Capability to 140%
Set CPU Phase/Duty Control to Extreme mode.
as to why I should go 140% rather than 130% and extreme rather than optimized?
post #7 of 10
Quote:
Originally Posted by ChozinOne View Post

Ok vcore is manual as I mentioned earlier.
C1E - Enable
C3 Report - From "Auto" to Enable
C6 Report - From "Auto" to Enable
C7 Report - Leave it "Auto"???
And can you explain more on..
Set CPU Current Capability to 140%
Set CPU Phase/Duty Control to Extreme mode.
as to why I should go 140% rather than 130% and extreme rather than optimized?

Leave C7 on auto, that's fine.

Both of those other settings are for your VRM's. I took them off of the SB guide here on OCN. thumb.gif
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post #8 of 10
Quote:
Originally Posted by snoochems View Post

The C2 revisions seem a lot better than the C0/1s that were going around early. So you should check that. If you have a C2, the guides you're likely to see are based on the older revisions, which don't .

There was no C0 stepping and C2 stepping only resolved the VT-d issue that was on the earlier chips. It did not effect that overclockability of the chips in any way from an aggregate point of view.

I feel you may need to remount your cooler. I think the retail shippings start throttling before 90 degrees, so that may be an issue. For reference my 3930K with a D14 only hits ~78 and that is with 1.440V.
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post #9 of 10
I thought there were C0 revisions on release. Anyways, I've been looking around, and it seems the C2 revision requires less volts for similar OC. This is just my observation though, so could be wrong.
post #10 of 10
Quote:
Originally Posted by snoochems View Post

I thought there were C0 revisions on release. Anyways, I've been looking around, and it seems the C2 revision requires less volts for similar OC. This is just my observation though, so could be wrong.

http://ark.intel.com/products/63697

Right hand side click on Ordering/SSPECS...
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