Chester (lamchester.delete@this.gmail.com) on November 25, 2020 3:49 pm wrote:
> Dummond D. Slow (mental.delete@this.protozoa.us) on November 25, 2020 8:29 am wrote:
> > Adrian (a.delete@this.acm.org) on November 21, 2020 7:14 am wrote:
> > >
> > >
> > > At TechSpot, they have run a set of benchmarks on all Zen generations
> > > (1, 1+, 2, 3) and Comet Lake (i.e. Skylake microarchitecture).
> > >
> > >
> > > What is interesting is that, as much as possible, the only differences
> > > in the 5 systems were in the core microarchitecture.
> > >
> > >
> > > The clock frequency was fixed at 4 GHz for all systems, all had 8-core CPUs,
> > > all had the same memory modules, the same coolers, the same GPUs.
> > >
> > > Therefore these show the evolution of the IPC, as well as this is possible.
> > >
> > > (Until the launch of Rocket Lake, there are no newer Intel
> > > CPUs that could be compared in identical conditions.)
> > >
> > >
> > > https://www.techspot.com/article/2143-ryzen-5000-ipc-performance/
> > >
> >
> > Seems that most of the responses are various arguments so dunno if many people are actually
> > interested, but there are also IPC tests from The Stilts. He uses many non-standard programs
> > for it so it might be intereseting as an addition to standard benchmarks.
> >
> > https://imgur.com/a/3B8QcEG
> >
> > It should all be single thread, locked to 4.0 GHz tests. Average number is here:
> >
> >
> > MTS = Zen 2, VMR = Zen 3, CML = Comet Lake/Skylake
> >
> > Description here.
>
> I'm gonna criticize this test for the opposite reason juanrga criticized the other one: this person
> didn't match memory speeds. Intel was tested with DDR4-2933, AMD was tested with DDR4-3200. When
> comparing architectures, it's best to keep variables constant as much as possible.
>
BTW for Matisse and Vermeer the supported speed is the same (DDR-3200) and the same was used for both so the Zen 3 IPC boost is not influenced by this, only Skylake's IPC is (but Skylake is not so interesting, is it).


>
> So I find the voltage scaling graph far more interesting:
>
>
> Zen 3 is able to hit 4.5 GHz at just above 1.1V - way better than Zen 2.