Your board should have this CPU OC profile:
Set CPU Upgrade 7700K 4.6GHz profile, you may try it with enabled/disabled XMP profile, reboot into windows and check CPU-Z at load. Not sure if you're facing cooling limit when OCing to higher clock, perhaps you could try 4.6GHz instead of 4.7GHz.


Try higher CPU vCore LLC such as Turbo/Extreme etc, default (Auto) should be "Standard".
Higher LLC means less vdroop (vCore drops at load).

Alternatively, you may OC your CPU in OS via GBT's EasyTune software, but you will need to install APP Center first before installing this utility.

EZ Tune: https://download.gigabyte.com/FileList/Util...e_200series.zip
APP Center: https://download.gigabyte.com/FileList/Util..._B20.0506.1.zip



This post has been edited by owikh84: Jul 18 2020, 08:50 AM

Easy Tune is an OS-based OC utility, of course it won't save your OC settings after a reboot, unless if it offers an option to auto-load that OC settings on each Windows start.

Hmm, no idea what's happening during your BIOS set-up.
Perhaps you could snap a video during that BIOS settings and share with us over here or whatsapp me.

Your descriptions of problem sound like a failed OC after pressing that F10 (save) key and your OC settings lost.
Then it auto reverted to the default settings due to that failed OC.
If CPU is not OCed and XMP is enabled, did your RAM run at the specified speed/timings?