Found stable oc now what?

[Zophos]

Hi guys,

I overclocked my cpu yesterday to 4.2. My cpu is a 2500k and my mobo is Asrock extreme 4 gen 3. I currently have my voltage at fixed mode. My question is when i've found my stable oc should I enable any of the c state things (like CPU C6 State Support) and what other settings should i change? Another thing is whether it is safe to run fixed voltage 24/7. My voltage is 1.2.

 

[kilobravo]

1.2v 24/7 is pretty safe on sandybridge,if you have decent temps as well.

 

[airdeano]

for a minimal oc 1.2 sounds high in voltage, unless the CPU has been cooked for
a while. should be more in line with a new chip of 1.125-1.135 for 4.2GHz. but
it comes down to motherboard handling of voltages and end-users knowledge.
usually, 1.2 is 4.5/4.6 territory, but again, the silicone lottery isn't always kind.

the LLC on ASRock boards is bass-ackwards than most other boards. 1 is the
"extreme" and 5 is small change. make sure you are using #1 or 2 for LLC.

 

[Zophos]

My LLC is at level 1. And what about the c state things?

 

[Netroxen]

Higher LLC can sometimes correlate to higher core voltage but more consistent power delivery with less VDroop. However for 4.2 it's unnecessary to bump the LLC up as that's already a fairly minimal overclock.

Enabling the C states means the CPU will try to reduce power consumption - However the transfer between states, power delivery and core clock changes can sometimes make an overclock less stable. As a general rule of thumb, C states should be disabled to prevent stability issues. However that's not to say it won't run fine, try it and see...

However, what you can try is CPU voltage offset. This allows the CPU to enter a state of less power consumption and then accordingly increase the voltage when the CPU cores become active.

This is achieved by measuring the default voltage and then adding an offset voltage to meet the requirements for core stability.

So for example, say my default voltage is 1.125v at stock and my overclock requires that I need 1.2v for stability - I can set the offset voltage to +0.075v to achieve the required voltage. NOW the C states should be enabled and the CPU should downclock and boost the core clock and voltage depending on the core load.

Hope this explains?

 

[Zophos]

I tried to set up the offset mode but i don't know why it doesn't work. My voltage is 1.2 i use the offset numbers so that my bios shows 1.2 and it just isn't stable. Does offset require more volts?

 

[Netroxen]

No it does not. TBH, I've not had much luck with it in the past - Some people may call me a noob but I'm happy with set clocks and voltages. lol

 

[Zophos]

And is it possible that the voltage shown in the bios isn't the one the processor is running at?

 

[airdeano]

if you find master & puppet, in his sig he's got a guide on offset overclocking.

 

[remember300]

if you find master & puppet, in his sig he's got a guide on offset overclocking.

good guide

 

[Netroxen]

And is it possible that the voltage shown in the bios isn't the one the processor is running at?

Ofcourse it's POSSIBLE, but that's why there's such a huge variety of programs available on the web to double check things with.
Try the Tech|Inferno version of RealTemp, it's supposed to read the base VID for the CPU:
http://www.techinferno.com/2012/11/23/realtemp-techinferno-edition-now-available/