So I had the same issue with 5.2, I turn off sli install x16, turn on kboost and when I turn sli back on kboost automatically turns off. I cant turn it back on and for some reason while playing games with x16 in 3way sli only one card is boosting. 4.3.2 is the most effective software I have tried. kboost works, I am able to overclock all 3 cards +180 gpu and +400 memory with no issues. With x16 5.2 and 5.2.2 I have bugs in game even with no overclocking. One other thing I noticed that may help some people. when you change the pixel clock, you have to change it back to its default because if you uninstall x16 the pixel clock automatically stays at whatever you changed it to. This may not be a problem, but just throwing it out there.