As expected, NVIDIA NVENC releases all pressure off the CPU and does not use GPU neither since it's done on a hardware chip.I haven't done any other presets on NVIDIA NVENC and Intel Quick Sync but the High/Best Quality because the quality was already not that good (you don't even want to see what it's like on High Performance) and there was no load bottleneck, so no need to use a faster preset.Although I don't have numbers to prove it, I usually stream at 720p and have noticed OpenCL performing better than that: maybe OpenCL works better when used in conjunction with downscaling or smaller input resolutions? Would need another benchmark to check. OpenCL seems to ease between 5 and 10% off the CPU. Maybe the CPU is not loaded enough and decides it's not worth to offload some work to the GPU? Notice how the GPU load for Ultrafast rests at 10%, just like the other presets without OpenCL, whereas with OpenCL all other presets had a 30%+ GPU load. I haven't done Ultrafast without OpenCL since it didn't seem to take it account anyway.I haven't done Ultrafast VBR as it would have yield the same results as for other presets.
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