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i7-2700k OC 4.5GHz help

post #1 of 71
Thread Starter 
Hello!

I'm trying to overclock my Intel Core i7-2700k processor to 4.5 GHz, and have a few questions.

Here's my specs:

ASUS P8Z68-V Pro/gen3
Intel Core i7-2700k (cooled with Corsair H80)
Corsair HX 850W

First off, I tried to get it stable with manual vcore. I believe I got it stable with vcore @ 1.32 V. Now I want to use offset mode, to reduce the voltage @ idle.

The settings I use are:
Multiplier: 45x
Offset mode (-0.025)
LLC: Ultra high (75%)
VCCIO: 1.1v
Everything else is left on default/auto. Do these settings seem okay?


One weird thing happened tho. I ran prime95 to check the stability on the new settings, when I came back after about 30 minutes, the motherboard was @ 126c ?! This was read with both AI Suite and CPUID Hardware Monitor. I rebooted, and now the temperature is back to normal @ 26c. This scared the **** out of me. Any ideas?
Edited by andersgamer15 - 1/1/13 at 12:29pm
post #2 of 71
you have to find what is right for your board if I use a voltage under 1.35v I just stick with manual because I always have to use more voltage when using offset to get it stable plus I am not trying to save electric.

but as to your question try LLC or ultra high, and a + offset of .010 and go from there until you can match your voltage under load. Why I think it need more voltage at offset is because when your not at a 100% load such as when gaming the vcore will not get up to what it does when stressing which will in turn usually crash during gaming, that is just my 2 cents. good luck with your overclock.
post #3 of 71
vccio is the memory controller voltage I don't see a reason to change that unless your are using all dimms on mobo and over 16gigs. increasing that should be last resort as it also causes more heat.
post #4 of 71
Thread Starter 
Thanks for your quick reply! smile.gif
I increased the VCCIO to 1.1V, because when I left it on auto I got a BSOD with error code 0x0A.

I'm not trying to save power, but I often leave the computer on while I'm away, and therefore I want the voltage to go down to increase the lifetime of the CPU. But maybe I should just stick with manual vcore aswell...

Do you know why the mobo temperature went all the way up to 126c?
post #5 of 71
asus suite is junk. uninstall that crap.
i know with asus p67, those boards like llc of high not ultra high with offset. i dont know about z68.
i also used 1.1v for vccio with 2 dimms of ram and i used .010v or .015v less vcore and was still stable. but i also put my 1.5v ram at 1.525v.

enigma, if your vcore 'doesnt go as high under partial load' the llc setting is too high. you dont want vrise. you want vcore to stay the same or drop without dropping so far as too cause a bsod 101 or 124. you need a lower llc setting and more vcore. vrise will heat up the vrm's. that isnt good.
my settings:
high llc with +.005v offset is better than ultra high or extreme llc with -.025v offset.

*EDIT*
continuing on that thought, a higher llc causes a lower idle voltage and that can lead to idle and random bsod, like when youre under partial load.
Edited by pc-illiterate - 1/1/13 at 12:33pm
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post #6 of 71
actually i can vouch for Asus Suite having incorrect readings. It was giving me an idle temp colder than my room. Other software gave more realistic readings.
post #7 of 71
yes off that far. ai suite reporting a cpu temp of 42* while under stress testing. lol. a real temperature of 64* reported in core temp, hwmonitor, realtemp....
ai suite makes a good fan speed monitoring tool. and i really doubt anyone actually connected to asus or ami writes the software.
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wd  asus dvd multi-write arctic cooling freezer 64 pro win 7 ultimate x64 
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post #8 of 71
Thread Starter 
HWMonitor is showing the same temperature as AI Suite. I hope it's the sensor reading wrong..
post #9 of 71
Is realtemp reporting the same?
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post #10 of 71
Thread Starter 
Can RealTemp read the motherboard temperature? I can't find an option for it...

Here's a screenshot of HWMonitor temperatures:


As you can see, the SYSTIN temperature is @ 123°C, which is the motherboard...
Edited by andersgamer15 - 1/3/13 at 11:38am
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