i7 6700k overclocking question

mmdup93

Prominent
Dec 5, 2017
12
0
510
hello, I'm relatively new to this forum and to OC, so I have a few doubts.
I recently bought a new mobo: Asus z270 TUF Mark 1, and paired with my i7 6700k. While playing/rendering my temps got too high up to 90º. I did some research in the internet and found that some mobo manufacturers (Asus in my case) ussualy overvoltage the cpu vcore to be safe (or something like that).

So i did some more research and finally decided to tweak my CPU vcore manually. Turns out that @ stock 4.0-4.2 Ghz Turbo, I can run my CPU with vcore @ 1.17v. I stresses tested it with Aida64 FPU and Intel Extreme Tuning Utility 1 hour each and nothing happened, I even got to see a movie on the PC while testing and all OK, temps never got higher than 68º-70º.

I put the vcore on Adaptive mode on the bios, setting it to the stable 1.17v I tested and the offset to minimum 0.001. I also activated XMP to get my RAM to run at 3200Mhz. HWMonitor readings show my CPU vcore at max 1.184v under stress, which is a little higher than the 1.17v, but all in all my PC never crashed. So far so good.

Later I decided to OC the cpu to 4.5 Sync all Cores (I tried Asus's own EZTuning but it was spiking the voltage to 1.44 and temps up to 100º). So I tuned manually the core ratio to 45, and the vcore to 1.22v. All stable, stress test passed after 2 hours.

However Manual mode set my CPU voltage to 1.22v 24/7 even when I leave the PC idle, something I don't like. I had tu put it in Offset Mode (-) with an offset of 0.13v (Adaptive mode always crashed and any other lower value on offset would spike my vcore and temps to 1.44 @ 100º). Now HWmonitor shows my CPU running @ 4.5 1.21v-1.23v with maximum temps of 78º. Been 2 days since I did this. So far so good too.

In both cases, I only disabled Asus Multicore Enhacement, enabled EPU power saving, and tweaked core ratio and vcore only, all other settings in bios were left in default Auto.

My question is: am I OK with this OC settings? should I change anything?. I'd like to hear (read?) some more experienced opinions.

Thank you all in advance

My main rig components are
i7 6700k @ 4.5 cooled with Corsair H100i GTX
Asus TUF Z270 Mark 1
16GB Corsair @ 3200
Sapphire R9 390
 
Solution
I had a very similar setup to yours with a 6700K on a Gigabyte z170x Gaming 7 motherboard. All I can say is that you have a very good CPU as you have managed to get a 4.5GHz stable at 1.21-1.23V at max temps of 78 Degrees. I had mine at 4.5GHz but required 1.325v...So you have nothing to worry about.

You have also benched and tested for a fair few hours across AIDA and XTU so again no problems. Offset mode is perfect, I had mine running on Offset in the end as it is the best of both world.. Your vcore and max temps are all within really good parameters, in fact your in much better shape than most. Remember in real world CPU use, you will rarely be stressing your CPU to the levels of AIDA and XTU. Gaming, video processing, editing etc...
I had a very similar setup to yours with a 6700K on a Gigabyte z170x Gaming 7 motherboard. All I can say is that you have a very good CPU as you have managed to get a 4.5GHz stable at 1.21-1.23V at max temps of 78 Degrees. I had mine at 4.5GHz but required 1.325v...So you have nothing to worry about.

You have also benched and tested for a fair few hours across AIDA and XTU so again no problems. Offset mode is perfect, I had mine running on Offset in the end as it is the best of both world.. Your vcore and max temps are all within really good parameters, in fact your in much better shape than most. Remember in real world CPU use, you will rarely be stressing your CPU to the levels of AIDA and XTU. Gaming, video processing, editing etc will run at lower temps...

In answer to your question, the overclock settings you have are very good and you need to change nothing. Have fun as the 6700K looks like a golden one and your cooling in the H100i GTX is more than good enough...
 
Solution

mmdup93

Prominent
Dec 5, 2017
12
0
510
Well...eventually after a nighttime render (the same day I wrote this thread), the 4.5Ghz OC crashed...
So I increased the voltage yet another bit, temps went up to 82º max on the hottest core, but I think I have a stable system now since I was able to complete the render scene :)
It's good to know my OC experience turned out OK, thanks

PS: I hope this is just a reading error or a broken sensor on the mobo, but Aida64, Intel XTU, Asus Ai Suite 3 and HWMonitor (all four softwares!!) show a "Temp Sensor 4" going from 0º to 128º. I tried the "fingerometer technique" (that's how we call it in my country) and placed my finger in all my PC's heatsinks and nothing seemed to be in a melting 128º temperature nor freezing @ 0º; so I'm just ignoring that reading...
 
I think you are fine on the 'temp sensor 4'. If at all possible, try to get a little airflow going around that area, especially if you are rendering for long lenghts of time. I have a fan that blows some air just over the VRM heatsinks which drops temps by a huge ammount. You do not need to do this if all you are doing is gaming and some light production work.

Your vcore at 1.22v seems very good as I could not get my 6700K at 4.5GHZ with that vcore, mine required just over 1.3v so you are looking good.
 

mmdup93

Prominent
Dec 5, 2017
12
0
510
I purchased a Noctua 40mm fan to put it on my mobo VRMs, the ASUS TUF Mark 1 has a spot to place such a fan right behind the I/O shield and blow fresh air to the VRMs.
I still think that a sensor is kinda broken since it idles @ 0º at an ambient room of 28º-32º, and spikes to 128º.
Thanks again