Originally Posted by nathanddrews
Don't know what to tell you, Puwaha. The SVP Index is nearly always at 1.0 and CPU usage never goes over 85%. My GPU (GTX 670) must be doing most of the heavy lifting.
SVP prioritizes frame smoothness at the expense of artifacts.
I traded in my GTX680 for a 7970 as there were too many artifacts @120Hz on the GTX680 and the render was half the speed of of the 7970, this includes SVP interpolation time.
The low CPU load is a quirk in Nvidia's implementation of OpenCL on the GK104 which seems to suffer high IO latency. GPU-Z says the load is high (>50%) but the temps are quite low, so the GPU is really waiting and not doing useful work. The GPUs can become the bottleneck slowing everything down.
SVP is adaptive in how it uses the GPU, if the GPU processing latency increases, SVP reduces the workload and is one reason artifacts crop up.
Puwaha is correct about a faster GPU if you want to get rid of artifacts.
The other thing is to increase the thread pool, I use 19 threads on mine.
There is considerable difference in the minimum spec for smooth playback on SVP vs smooth and artifact-free playback,
Additionally if the latter instance is important the playback chain must be capable of rendering and presenting frames at 2X the refresh rate @96Hz, this is about 5.5ms
This applies if there is a lot of motion in the scene
Below are 2 screen captures using the same SVP settings. One is the 7970 and the other is a GTX650Ti. The 650Ti shows pronounced ghosting as SVP needed to keep the workload low to avoid frame drops.
The capture is a 1080p clip of 93Million Miles from Jason Mraz posted on Youtube, the car is moving rapidly from right to left.