Insert all cards into the motherboard and install the target driver.
Locate the nvlddmkm.sys file. It should be found in: C:\Windows\System32\DriverStore\Filerepository\nv_dispi.inf_amd64_xxxxxxxxxxxx
Copy the file to the DifferentSLI folder, run DifferentSLI Auto, and click „Patch”.
If no errors occur, edit the Install.cmd file: Replace the highlighted paths with your specific ones (the source path of your nvlddmkm.sys file).Change http://timestamp.verisign.com/scripts/timstamp.dll to http://timestamp.digicert.com.
Boot the system into Safe Mode with Networking and run Install.cmd.
Copy the patched nvlddmkm.sys file from the DifferentSLI folder back to its original location.
Reboot.

DirrefentSLI 1.7 Techpowerup

Black Screen Fix & Performance Tweak:

Nvidia Control Panel > Adjust desktop size and position > Perform scaling on: GPU and check the box „Override the scaling mode set by games and programs” > Reboot.

Tested on: – Z690 Unify-X

Best Method! - modernSLI by Seby

Should work with any driver, on Windows 7 to Windows 11
ModernSLI GitHUB