Ryzen 1950x vs Ryzen 3950x

This blog post provides a comparison of my Ryzen 1950x (Threadripper) and Ryzen 3950 (Desktop) CPU

Table elements below come from mixture of wikichip and direct measurements I’ve made with lmbench, STREAM and Phoronix Test suite. Given the specs, I’m surprised the benchmarks show as large of a change. Wondering if my Ryzen 1950x is properly configured or if there is another reason.

Item	Ryzen Threadripper 1950x	Ryzen 3950x	Ryzen 1700x	Notes
Cores	16	16	8
Threads	32	32	16
Base/Boost Clock	3.4 GHz / 4.0 GHz	3.5 GHz / 4.7 GHz	3.4 GHz / 3.8 GHz	Faster boost, expect higher single-threaded performance.
TDP	180W	105W	95W
Memory	2667 MHz DDR4 4 memory channels 79.47 GiB/s	2400 MHz DDR4 2 memory channels 47.68 GiB/s	2400 MHz DDR4 2 memory channels 39.74 GiB/s	Faster memory, expect memory-bound latency to be slightly faster. Fewer memory controllers and memory bandwidth. Check STREAM performance.
Core	Zen	Zen2	Zen
Cache	16 x 64 KiB L1I, 4-way 16 x 32 KiB L1D, 8-way 16 x 512 KiB L2, 8-way 4 x 8 MiB L3	16 x 32KiB L1I , 8-way 16 x 32 KiB L1D , 8-way 16 x 512 KiB L2, 8-way 4 x 16 MiB L3	8 x 64 KiB L1I, 4-way 8 x 32 KiB L1D, 8-way 2 x 8 MiB L3	Less L1i and more L3. Compare across benchmarks.
lmbench	L1 - 4 cycles L2 - 10 cycles L3 - 16 cycles memory - 150 cycles	L1 - 4 cycles L2 - 10 cycles L3 - 17 cycles memory - 113 cycles	L1 - 4 cycles L2 - 11 cycles L3 - 17 cycles memory - 100 cycles
pts/rodinia OpenMP LavaMD	47.27 seconds	38.67 seconds	102.676 seconds
pts/rodinia OpenMP CFD solver	15.082 seconds	12.004 seconds	32.502 seconds
pts/namd	1.41998 days/ns	1.13749 days/ns	2.87945 days/ns
pts/x264	124.37 frames/second	149.44 frames/second	60.71 frames/second
pts/x265	34.70 frames/second	54.76 frames/second	7.06 frames/second
pts/compress-7zip	64379 MIPS	98677 MIPS	31465 MIPS
pts/stockfish	37267071 nodes/second	51242651 nodes/second	18967192 nodes/second
pts/asmfish	34856084 nodes/second	51295444 nodes/second	19168181 nodes/second
pts/gcc compile	978.643 seconds	692.402 seconds	1294.157 seconds
pts/linux kernel compile	50.663 seconds	34.973 seconds	90.695 seconds
pts/povray	32.672 xeconds	24.128 seconds	64.075 seconds
pts/radiance Serial	813.706 seconds	588.438 seconds	878.193 seconds
pts/radiance SMP parallel	260.705 seconds	186.469 seconds	319.56 seconds
pts/openssl	3065.2 signs/second	4740.1 signs/second	1368.8 signs/second
pts/ctx-clock	170 clocks	175 clocks	150 clocks
pts/sysbench	30970.0407 events/second	34976.4773 events/second	13378.7779 events/second
pts/blender barbershop	767.63 seconds	532.7 seconds	1472.21 seconds

Performance analysis, tools and experiments

An eclectic collection

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