A note about the latest nVidia GPU drivers (430.39). With this new driver version, nVidia doesn't allow applications to set Power Limit and Temperature Limit unless you are running your process (Awesome Miner or Remote Agent) as Administrator. All other clocking operations works fine without being Administrator - just like before.
I will investigate this in more detail to find a more user friendly solution.
My recommendation would be to wait with upgrading the nVidia drivers if you set any of these two properties using the Native Overclocking feature in Awesome Miner.