With 256 bit ops Intel hardware has double load/store bandwith to L1 cache vs 128 bit ops. Obviously L1 bandwith isn't problem for one thread as Zen can keep up but for SMT scaling extra L1 bandwith sure helps.
WOW, I would have to say for this type of load, the 2990wx really beats them all for perf/$$$. Stock is 4th place($1730), OC'ed is 3rd place, and 2nd is dual $5000 EPYC 7601, and first place is dual $14000 8180. Now the 7980xe is only a little more than the 2990wx at $1850, but even OC'ed to 4.6, it still looses, and by a fair amount. When the 2990wx is OC'ed, its not even close.But with such higher LSU bandwith, not counting the alleged more FP ops/instruction, Intel score in MT should be vastly better clock/clock, wich is simply not the case, MT comparative scores are close to R15, wich say that your argument is BS.
What would be of interest is to measure power comsumption at fixed frequency/voltage for both R20 and R15 with say 8C/8T and then with SMT enabled.
Edit : Computerbase added a ton of CPUs at various frequencies in their chart :
https://www.computerbase.de/2019-03/cinebench-r20-community-benchmarks/
But with such higher LSU bandwith, not counting the alleged more FP ops/instruction, Intel score in MT should be vastly better clock/clock, wich is simply not the case, MT comparative scores are close to R15, wich say that your argument is BS.
What would be of interest is to measure power comsumption at fixed frequency/voltage for both R20 and R15 with say 8C/8T and then with SMT enabled.
Edit : Computerbase added a ton of CPUs at various frequencies in their chart :
https://www.computerbase.de/2019-03/cinebench-r20-community-benchmarks/
2600X stock:
Single core: 514
SMT off: 2318
SMT on: 2986
What do you mean matters?Interesting. CBR20 is so much better-optimized than previous versions that SMT matters a lot less.
The 514 is probably a typo. Computerbase got 416/3034 on their 2600X.
The 514 is definitely a typo. It must be 414 instead.
I get 541 on an OC'd i7-8700K @ 5.2GHz AVX load. There is no way a Ryzen 2600X scores in the ballpark of a 5GHz 8700K in ST performance.
Interesting. CBR20 is so much better-optimized than previous versions that SMT matters a lot less.
What do you mean matters?
That's still nearly 29% better with SMT enabled. I wonder if the increase is similar with Intel. I would expect it would be a bit less, as Intel seems to have better IPC but benefit less from SMT. Anyone want to give it a shot?
This new benchmark is a bit flaky... as it often blows up halfway through the benchmark in the embree library. i'm going to clock down to 2.1 GHz to see if its hardware related (but this system is IBT rock solid through hundreds of runs).
It most likely could be your system is flaky. Not the benchmark.
Chill out man..... No need to get all bold with a larger font size all you had to do was ask normally. Anyway......here it is.
And what if I don't WANT to run it ? I started to on one of my 2700x's, and it was taking forever. We don't need to big font and bolded.The large and bolded font was so other people could see it and it would act as a reminder.