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Overclock Kaby Lake (7700k) on Asus Maximus VIII Hero Problems

aaron1259
Level 7
First time poster here, so hello

I recently picked up a 7700k from a friend of mine, flashed the bios to the latest release, threw in (very gently) the 7700k. OS booted perfectly and recognised the cpu, idle temps ~30c and on load didn’t go past 70. Great, time to overclock.

This is where I ran into problems, I set the ratio at e.g 47 on all cores. The rest left on auto. Boots fine but in hwmonitor the freq won’t go past 4400 and single core of 4500. CPU-z shows 44x (8-47). Things I’ve tried:

- Older 3401 bios
- Older 3201 bios
- Gamers OC Profile preset
- performance and balanced plans
- cleared cmos and reconfigured
- uninstalled AI Suite 3 and AI Cleaned
- used configurations other users have used with a 7700k and z170
- clear cmos and only change ratio
- disabled all power saving in UEFI
- Completely reinstalled Windows on a new drive.

I’m running out of ideas, others have had success with Kaby Lake.

I was running a 6600k at 4.4 before upgrading.

System:
I7 7700k
Asus Maximus VIII hero
2x8gb 2400 ram
1tb 960 Evo
Aorus 1080ti Extreme WB
ek x360 custom loop
650w 80 gold PSU
Windows 10 Pro

Any help is greatly appreciated
Thanks!
5,708 Views
31 REPLIES 31

aaron1259
Level 7
Just at work, if you leave what else I should try here I’ll give them a go too, I’m willing to try anything lol. If all else fails I’ll just have to buy a z270 this weekend and hope that fixes it.

Nate152
Moderator
Ok so reflashing the bios didn't fix it ?

All right, check the minimum and maximum processor states are set to 100%, this is with the windows power plan set to high performance.

I made a quick video for you.

aaron1259
Level 7
Correct, reflash to same version still has the same problem, still using the setting you gave me. And power plan is on High Performance with 100% min and max.

Nate152
Moderator
Double check you have the cpu fan connected to the cpu fan header and NOT the cpu_opt header.

aaron1259
Level 7
Yeah, the three 4 pin slots at the top, I have it pump in the first, second nothing, and third I have the radiator fans (3 into 1 splitter then into that slot)

Nate152
Moderator
If you have the Samsung magician software installed, try uninstalling that and see if it makes any difference.

aaron1259
Level 7
Never had Samsung magician installed

Nate152
Moderator
Ok,

If it's not too big of a deal, try reinstalling windows to see if windows is limiting the cpu frequency.

aaron1259
Level 7
Yeah, I’ve already reinstalled windows onto a new m2 drive, and it didn’t make a difference, I don’t think the z170 is going to work for me

Nate152
Moderator
Ok,

What do we have to lose, try installing the Samsung magician software and see if it makes any difference.