I found in my Zen 2 llrSOB tests that temperatures of the RAM modules were ~5...10 degrees higher than when TN-Grid was running, and temperatures of the RAM VRMs were ~10...15 degrees higher.
Zen 2 will perform poorly at this, because its level-3 cache is divided into 16 MB segments. (In APUs it is much less.) Zen 2 will therefore have to perform a lot of main memory accesses and will consequently be unable to keep its FMA units busy.
After I actually tried it, I have to say it is not too bad after all, at least on my 32-core Epyc and on
@waffleironhead's Ryzen which both have a ratio of 4 cores : 1 memory channel. (In my case: 4.8 W power budget per core, and DDR4-3200c22 memory.)
I guess the Zen 2 CPUs with 8 cores : 1 memory channel will show clearer signs of memory bandwidth limitation.
If anyone wants a reference time, my 3700x using all 8 cores(no SMT) does sob at 2.88% per hour or about 125,000 seconds(35 hours).
Ah, I see there are already four complete results
on your host, each one apparently in the 8-threaded config,
152,931.14 s (42 h) for 74,122.76 credit -> 42,000 PPD
124,224.46 s (35 h) for 74,126.64 credit -> 52,000 PPD
125,101.35 s (35 h) for 79,209.90 credit -> 55,000 PPD
128,091.88 x (36 h) for 74,165.35 credit -> 50,000 PPD
I tried the "8cores(no SMT)" config (among other configs) on the 7452 with a 74,066.82 credit WU but only until it was 1 % complete. Simply taking the test duration times 100, I arrive at 43 h duration and 42,000 PPD (per each set of 8 cores; 330,000 PPD over all 2x32 cores).