Looking at the sources in the Benchmark Guide - none of the BBB links worked for me nor did the TOS 1080p MKV source. I did try both .webm and .mov and found very similar results. I don't know if .mkv input files would have the same results...??? I posted results for .mov files.
AMD Ryzen 5950X
16 core/32 threads
Memory 32 GB 3600/CL-16-16-16-19
All-core OC 4500
TOS 1080p --> Fast1080p30 - 243 fps / 66% CPU
https://pastebin.com/nQC268PH
TOS 1080p --> H265-1080p30 - 46 fps / 41% CPU
https://pastebin.com/X4wF01Fz
TOS 4K --> Fast1080p30 - 78 fps / 52% CPU
https://pastebin.com/U29CfPAD
TOS 4K --> H265-2160-60 - 15 fps / 75% (this ran much 'peakier' than the others with jumps to over 90%)
https://pastebin.com/6HAursYP
I've found the 5950X to be around 20% faster than the 3950X I has previously - this is doing 4K encodes with my settings - CPU utilization is typically > 90%. I experimented with PBO on the 3950X and found that even a minor all-core OC of 4000 beat PBO performance with lower temps.
AMD Ryzen 5950X
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Re: AMD Ryzen 5950X
Memory correction: 3600/CL-16-19-19-39