DPC latency spikes heavily interfering with audio playback

Hi, After installing my new graphics card (ASUS nVidia GT640) and the drivers, I started experiencing extreme dropouts in audio playback with every player. Ran standard DPC checks and found that I was experiencing extreme spikes during graphics refreshes (e.g. scrolling through folders in Explorer). I definitively linked the spikes to the nVidia card/driver combo using LatencyMon and xperf,...