…no lag but now I get repeated system freezes. Preferred the lag, actually. Waiting for a fix in NVIDIA web driver.
I'm using 17,1 system definition. The Release Notes actually say that the driver update is for Mac Pro 5,1 and 4,1 and 3,1. BETA support is for iMac 14,2 / 14,3, iMac 13,1 / 13,2...