how do you turn on vsync with Nvidia?
Old thread, but I wanted to share some findings:
I was running driver version 84.21 because of problems in the past with deinterlacing. My video card is a FX5200 PCI.
With this driver I always had crashes when hardware acceleration was enabled in Purevideo settings, but the picture was way better than without. Recently I gave Forceware 163.75 a try and had no crashes since than with hw acceleration enabled.
But with that update the picture in TV was jerky as hell, not what I expected it to be. I searched my old hints for setting up my MPPC and found the solution: vsync was turned off in the driver settings! After enabling there it was: smooth content.
Don't know if this affects newer video cards but its worth a try for every NVIDIA card owner I suppose.