I made a list for you guys and girls to follow in order to make Sli work again.
1. First go make sure "C:\ProgramData\NVIDIA Corporation\Drs" Right click -> Properties and unselect read-only on both files nvdrsdb0.bin and nvdrsdb1.bin
You can turn off windows "Enhanced pointer precision" in mouse properties. That will help with muscle memory. Personally I play with 14% Soldier mouse Sensitivity and around 1000 dpi. But recently I went up to 1600 dpi to be a bit quicker.