Stand alone 3DMark instead of steam version.
Stripped windows.
Lowest res and refresh rate on monitor.
Nvidia settings to performance
3Dmark and its sub processors set to run with real time priority.

 

Thanks! Also been told to force shut explorer.exe in Safe Mode for better results

 

Force reBar with NVIDIA Profile Inspector for higher graphics scores in TS and PR. Although this will nerf your CPU score somewhat in TS. Have to run it both ways to see what gives the highest combined score.

For Firestrike and 13900k, disable either 3 or 7 of the ecores to boost your graphics score. Try both, either can get good combined scores.

Install the NVIDIA drivers with NVCleanInstall and only install the driver and disable driver telemetry.

Unplug any additional monitors. Usually disabling them is enough but I found additional performance in Speedway by physically unplugging. (yea weird)

Try different bios. Pretty much all bios can be flashed except the FE bios. MSI seems to be strong in Speedway. I haven't done enough testing to form any other opinions. Strix bios on my TUF seems good in everything with MSI holding a small advantage in Speedway.

 

Only thing yet to add is that windows 10 LTSC sometimes offers better scores in benches. And is debloated and streamlined by default.