I7-2600K + Asus P8Z77-V Deluxe *Overclocking optimization

That voltage is high. With your LLC setting, you are probably overshooting that voltage too. What kind of life span do you want from this CPU?

What temps/voltage are you getting under Intel Burn Test?

I have no idea, how to find it there :S

This is where I got my copy of Intel Burn Test:
http://www.majorgeeks.com/IntelBurnTest_d5987.html

Here you can get CPU-Z:
http://www.cpuid.com/softwares/cpu-z.html

And here you will find Coretemp:
http://www.alcpu.com/CoreTemp/


All of these programs are free. Download them all then open them so they are all running at the same time.

Then run a test in intel burn test and watch your voltage(cpu-z) and your temps(coretemp)

Note: If you get anywhere near 1.45 volts before you start your test, don't start a test. Go back and lower voltage in the BIOS first. 1.4v is already higher than I would run for any chip I intended to keep longer than a year.

If your temps get near 80C, stop the test.

An ideal overclock would be voltage below 1.38v and temps under 75C. (Under full load...intel burn test.)

Okay, It gets a max of 1.416V. But the question is, how to optimize the system? 4.8GHz definitely not the limit for this chip and it does fails at 1.38V

It may be the SAFE limit for the chip.

You may need to back off the clock speed to get it stable below 1.38v.

You could try changing your CPU voltage frequency to 350. That's the only thing I can think of that mught help.

I read you should put 350 in VRM frequency, does it refer to CPU voltage frequency?

Yes.

Thanks, we'll see if I could get the voltage lower.

Okay! With that change it seems quite stable! Running 4.8 @ 1.38v (Prime95 - 14hours) I'll try to lower it even more, to see how low it can get or even boost the multiplier. Many days of testing ahead...