I have a Logitech G510 and had the same problems as the other too. I followed you suggestions and the problem is better, but has not gone away. I disabled both the fan and Nvidia SMBus checks. I still get the lag with AID64 is on, 1.60.1300. Is there anything to try. I have 20 sensors on the display, can to many be an issue? I am using GTX 480s and a GTX 470. Is there anything else I can do? Thanks.