I searched the net all over to find ways to reduce DPC Latency on my PC and I succeeded by having an average latency of 15-30, but nvlddmkm.sys (nVidia driver) creates spikes that go as high as 600us! I hear there was something called DPC Latency Enhancer, but I can't find it anywhere. Also, Set Timer Resolution program makes things worse by creating a 500us ceiling, but also increasing the average to the same 500us!!! I removed all the drivers I could to reduce the latency, but I need the latest nVidia drivers, so...