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4790k overclock asus gryphon adaptive

welshrat

welshrat

welshrat

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Joined
31 Dec 2011
Posts
1,091
Hi all, I have just upgraded from a 4670k to a 4790k as a present for my birthday from the wife. I had the original cpu running at 4200 ghz as I had no real need to go higher however I thought as I was upgrading the cpu I would try and sort the overclocking properly.

I am using a gryphon z87 asus board and I have it set at 4.4ghz and I am using adaptive voltage, the problem is in order for me to get the cpu to run at the desired voltage I also have to set a minus offset of 0.07v as otherwise cpuid reports 1.287v under full load.

The overclock seems very stable but I don't understand why when I put 1.2v in the additional voltage for overclock in the asus bios, it doesn't stick to this value without the offset.

With the offset cpuid reports about 1.21 ish.

Can anyone shed any light on this.
 
Ok after much reading it appears this is a feature of haswell, avx instructions and adaptive mode. However after looking at many guides online which suggest the massive increase in voltage is fine, I decided to keep my negative offset and gamed all yesterday evening.

I have an offset of 0.085 and my voltage at 4.5ghz under full load is 1.209 and drops as low as 0.673 when idle at 800mhz, I am not too bothered about doing a lengthy test for stability as it appears fine and if I do bluescreen then I will decrease the offset a little, it was fine with gaming and general use all yesterday including a 30min stint on prime which uses avx, max temp 83 degrees under prime.

Should I worry that the idle voltage is that low ?
 
Last edited:
That low idle voltage is fine, as long as the system is stable for what you do. Id also reccomend Asus real bench for testing instead of prime.
 
setter said:
That low idle voltage is fine, as long as the system is stable for what you do. Id also reccomend Asus real bench for testing instead of prime.
Click to expand...

Many Thanks, just wanted confirmation as the system seems rock stable, at least for what I need it to do. Just a little odd overclocking like this compared to my sandybridge upstairs.
 
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