3570K overclock help

The best way I know how to describe Offset voltage is by saying that it allows the voltage to drop when the CPU is idling.  Actually, it just dynamically adjusts based on how much load there is.

I can help you figure out what offset voltage to start with so that you can work from there.  All I need are these 3 things:

• The idle corev oltage as reported by CPU-Z
• The full-load core voltage as reported by CPU-Z (while running Prime95)
• The full-load VID as reported by Core Temp (while running Prime95)

Quote:

Originally Posted by chip94 

Hey TwoCables,
The settings are here-
1)1.216
2)1.224
3)1.3060

Oh, thank you.

Quote:

Originally Posted by chip94 

I have a few questions too-
Why is core temp reporting my VID to be 1.3060 when i've only set vcore at 1.220? Is it because of LLC?

Because the VID isn't the core voltage.  It's hard to explain, but it's more or less an identifier.  The last I heard, this is the voltage that should be enough to keep the CPU stable at this multiplier.  Although, I doubt that it needs this much for only 4.4 GHz.

Quote:

Originally Posted by chip94 

Why doesn't the voltage drop during idle as it used to when I had my core 2duo and EP45T-UD3LR?

Because of the voltage mode.  The only way to get it to do that is to use an Offset Mode voltage.  It allows the voltage to drop when the CPU is idling.  Actually, it just dynamically adjusts based on how much load there is.

Quote:

Originally Posted by chip94 

And how do I set up offset voltage in the BIOS? I can't seem to find any settings for it.
THanks
It's currently at 4.4ghz and max load temp is 76C

That's what I'm about to help you do.  :)

So, the first thing to do is set "CPU Voltage" to "Offset Mode".  It's currently set to "Manual Mode".

Then set "Offset Mode Sign" to the minus sign.

After that, enter this number in the "CPU Offset Voltage" field:  0.085

This should result in a full-load voltage of 1.224V.  If it results in a lower full-load voltage than 1.224V, then try -0.080V.  On the other hand, if it results in a voltage higher than 1.224V, then try -0.090V

If using -0.085V results in a full-load voltage that's nowhere near 1.224V.

I'm curious to know what full-load voltage you can get with an offset in this general range.

You're welcome!

That's a good question.  I don't know for sure, but yet I think I saw people with 4.5 GHz and higher using like approximately 1.16V, which seems awesome to me.

Quote:

Originally Posted by chip94 

Okay, I just keyed it 0.085 and when I checked, my vcore was 1.32 and VID went down to about 1.24. I hit 85C-90C and then I stopped. I then put in -.080 or-.090 it would not boot into windows.
Even on manual voltage i'm not being able to get to 4.6ghz .Any ideas?
How important is offset voltage?
How about we go till about 4.6ghz and then play with offset?
Thanks

Yeah, the H60 is limiting unfortunately.  I mean, it seems that it may limit you to about 4.5 GHz here (at least based on these results).  Although, that's not bad for the 3570K because it's faster than Sandy Bridge clock-for-clock.  So, it's kind of like hitting 4.7 or 4.8 GHz with Sandy Bridge, except Ivy Bridge is hotter clock-for clock and voltage-for-voltage.

That's interesting that the VID went down.  I didn't know that it would do that!

Anyway, Offset is superior to Manual in that it allows the voltage to drop down when the CPU is idling.  So, when the CPU is idling, the full voltage isn't being needlessly pumped through it because the voltage is doing a perfect job of dynamically adjusting to the load.  So, using an offset should allow a CPU to live longer.

Anyway, if you want to just experiment with different clocks for now, then maybe it'll be better to try Manual Mode voltages in the meantime until you find an overclock you want to keep and then set the offset after that.  Although, I'm doubting a little that 4.6 GHz will be easy.

Quote:

Originally Posted by chip94 

Thanks for the help man! I'm only trying for 4.5ghz, so i'll try that tomo. Off to bed now. I'll update you on my progress.
Thanks again!
EDIT: How do you calculate offset?

By finding the difference between the full-load VID and the full-load voltage (because in this case, the higher voltage is the full-load voltage, otherwise we'd use the idle voltage if the idle voltage were higher - it's hard to explain).

Just be aware that the multiplier also changes with different multipliers.