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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!
5,709 Views
31 REPLIES 31

Nate152
Moderator
Hi aaron1259

Welcome to the ROG forum.

Try this:

1) Reset the bios to defaults (F5)
2) Set the AI Overclock Tuner to Manual
3) Sync All Cores
4) CPU Core Ratio 47
5) CPU Core/Cache voltage 1.25v - 1.30v
6) DiGi+ LLC level 6
7) F10 and Enter to save and exit

Is it now saving your overclock ?

aaron1259
Level 7
Thanks for the reply, unfortunately no luck with these settings either

Edit: I do seem to be getting 4500 on multiple cores simultaneously at times now, which I don’t think was happening before.*

Nate152
Moderator
Can you open HWinfo, run a test then post us a screenshot of HWinfo? Have it show all the maximum values.

Click the pic to make it bigger.

76490

aaron1259
Level 7
https://imgur.com/F7BrPWL

After running Cinebench

Nate152
Moderator
Thank you

Hwinfo is showing:

Core 1 - 45
Core 2 - 45
Core 3 - 44
Core 4 - 45

If you've set 47 as the core ratio, all four cores should be showing 4700MHz.

Try resetting the bios to defaults again (F5), if that doesn't work reflash the latest bios.

aaron1259
Level 7
F5 didn’t make a difference, is reflash different to using EZ Flash in the UEFI? I used EZ Flash to update to 3802

Nate152
Moderator

aaron1259
Level 7
Ok I’ll give that a go and report back

Nate152
Moderator