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Another 2600k OC'ing Thread

post #1 of 34
Thread Starter 
Hey all you SB overclocking experts! Need your input...
I'm new to Intel chips. Up until now I've always used AMD. Anyway my current OC on this SB chip of mine is as follows:

4.6 GHz @ 1.40 V, highest core temp (according to Core Temp, OCCT, and HWiNFO64) is 78C, running OCCT stress test for 10 hours.

Is this good? I've noticed there is a BIG difference between 4.5 GHz and 4.6 GHz when it comes to the voltage required for it to run stably, and the temps the core sees. I was able to get 4.5 GHz to run stably with just slightly more voltage than the default, and temps never went above 68C. Any thoughts, ideas, etc., from you would be appreciated. Oh, BTW, I'm using a Corsair H50 cpu cooler, w/ two 120 mm fans push/pull.
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post #2 of 34
Thread Starter 
Please help me. I'll give you candy. (i.e., rep) thumb.gif
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post #3 of 34
Almost always temps depends on the chip. I have mine at 4.6 right now and using prime 95 for 10 hours w/ hyper 212 (1 fan) it makes out at around 73-77 C (I think). Those temps sound about right.

Oh and I am using 1.375V (Again not sure cause i'm on my laptop).
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post #4 of 34
Thread Starter 
Quote:
Originally Posted by Willie828 View Post

Almost always temps depends on the chip. I have mine at 4.6 right now and using prime 95 for 10 hours w/ hyper 212 (1 fan) it makes out at around 73-77 C (I think). Those temps sound about right.
Oh and I am using 1.375V (Again not sure cause i'm on my laptop).

It says in your rig profile that you have it 5.2?
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post #5 of 34
Try enabling CPU PLL Overvoltage and upping the VTT a little bit. It may allow you to lower the Vcore and run stable.

I noticed the same thing with my chip. I'm not willing to tweak the VTT or enable PLL Overvolt so I settled for 4.5GHz. Without either enabled I need stupid amounts of voltage for a 46 multiplier.

Yet when I enabled PLL Overvolt (NOT changing the voltage of the PLL.. that stays at 1.7-1.8v) and upped the VTT a little bit (16GB of RAM) I could do 5GHz at 1.44-1.46v.

Plenty of people say PLL Overvoltage can be left disabled until shooting for 48+ multipliers but with both of my very recent (1 month old) 2500Ks they really need it enabled to get above 45. YMMV.
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post #6 of 34
The temp looks fine, but u maybe able to low ur vcore by tweaking other settings. What's ur bios setting such as LLC, PLL?
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post #7 of 34
Thread Starter 
Quote:
Originally Posted by friend'scatdied View Post

Try enabling CPU PLL Overvoltage and upping the VTT a little bit. It may allow you to lower the Vcore and run stable.
I noticed the same thing with my chip. I'm not willing to tweak the VTT or enable PLL Overvolt so I settled for 4.5GHz. Without either enabled I need stupid amounts of voltage for a 46 multiplier.
Yet when I enabled PLL Overvolt (NOT changing the voltage of the PLL.. that stays at 1.7-1.8v) and upped the VTT a little bit (16GB of RAM) I could do 5GHz at 1.44-1.46v.
Plenty of people say PLL Overvoltage can be left disabled until shooting for 48+ multipliers but with both of my very recent (1 month old) 2500Ks they really need it enabled to get above 45. YMMV.

Okay, so I enabled PLL overvolt, but left the voltage. What is VTT?
Quote:
Originally Posted by Silver_WRX02 View Post

The temp looks fine, but u maybe able to low ur vcore by tweaking other settings. What's ur bios setting such as LLC, PLL?

PLL overvoltage "enabled"
CPU PLL voltage "auto"
I see nothing for LLC settings. What is LLC? PLL? VTT?
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post #8 of 34
Quote:
Originally Posted by croSSeduP View Post

Okay, so I enabled PLL overvolt, but left the voltage. What is VTT?
PLL overvoltage "enabled"
CPU PLL voltage "auto"
I see nothing for LLC settings. What is LLC? PLL? VTT?

VTT might also be labeled as VCCIO. Try increasing it in small increments, not allowing it to exceed 1.1v.

LLC is Load Line Calibration. You should set it 1 notch below the maximum -- Very High or 75%. It acts as a sort of voltage buffer against vDroop, ensuring that the CPU is supplied relatively consistent and stable voltage during load. Without it, CPUs can see great drops in voltage during load. With it set to Extreme or 100% the CPU might be adversely affected by voltage spikes during load (that is, voltage goes up rather than down), so 50-75% tends to be a sweet spot.
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post #9 of 34
that voltage is a little high for that clock, if you dont use programs that use HT you can turn that off and get lower voltage and temps, see my sig for comparison.
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post #10 of 34
Thread Starter 
Quote:
Originally Posted by allupinya View Post

that voltage is a little high for that clock, if you dont use programs that use HT you can turn that off and get lower voltage and temps, see my sig for comparison.

What's an example of a program that uses hyper threading?
Still I don't see anything in my BIOS about LLC... What else might it be called? There is a thing called "system agent voltage" and CPU I/O voltage; both of those things have adjustable voltage.
BTW, what is Vdroop?
Edited by croSSeduP - 11/19/11 at 10:42pm
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