Thanks for the reply. I'm running 190.42 but can't get this parameter working. I found this thread
but adding it to my ~/.nvidia-settings-rc has no effect (tried values of 2, 10, 50, 99 and they all looked the same).
EDIT: Nevermind, it's in the GUI. Thank you for pointing me to this. A setting of 50 is a great compromise for me!