Bought new 12700K CPU bit Hybrid only utilizes 20 percent of it

[shijan]

GPU Open CL feels rather slow even compare to RX 580 released 5 years ago. (I measure by that card because i currently use RX 580. It is OK Open CL GPU, but way slower than many modern medium priced GPUs) So if SVP or x264 somehow use Open CL, it could be a bottleneck compare to your CPU.

Also x264 may slowdown things. Try encode to master copy using lossless and ultra fast FFV1 codec. Make sure set it to Version 3 to allow multiprocessing. Then do additional encode to x264.