Originally Posted by Gollie

I use Nvidia system tools to overclock 2, 3 and 4 GPU systems. I use EVGA Precision to calculate what the "linked" setting should be. Then I input those settings into Nvidia system tools, set fan speed (70%+ for OC's), click apply then close. A window will popup asking if you want the utility to keep the settings the next time Windows restarts. Click "yes"

After I restart my PC all the cards in the system are set to the same settings.

Works like a charm!

GL