Why would you do Hardware Acceleration off and Game Mode off? In a VR guide on this very forum, they recommend to have both ON, which kind of makes sense to me, since Hardware Acceleration reduces latency. It is the same reason this is ON that we also enable Low Latency on the Nvidia Driver level for. We want as little latency as possible. Also, When Game Mode is on in windows, it tunes the windows processes and gives priority to the game that is being ran. I believe Razer Cortex does the same.