David Kanter (dkanter.delete@this.realworldtech.com) on October 10, 2020 10:36 am wrote:
> anon.1 (abc.delete@this.def.com) on October 10, 2020 12:44 am wrote:
> > Mr. Camel (no.thanks.delete@this.gmail.com) on October 9, 2020 6:30 pm wrote:
> > > Blue (blue.delete@this.blue.com) on October 8, 2020 9:58 am wrote:
> > > > AMD's announce Zen3 with an average of 19% IPC uplift "in desktop applications"
> > > > and about a 5-10% clockspeed boost (ST, MT unknown).
> > > >
> > > > Seems like they're rightfully pushing to up their margin.
> > > >
> > > > If AMD can keep up this 15-19% gains every generation, when do
> > > > the "big on ARM" folks think ARM will effectively catch up?
> > >
> > > How would an 8 core Zen 3 desktop chip compare to a desktop class 8 core Willow Cove chip?
> > >
> > > This assumes that a desktop Willow Cove could hit higher frequencies
> > > than the mobile version due to more thermal headroom.
> > >
> > >
> >
> > We have only one datapoint, so lots of salt required. Anandtech has some info on cinebench
> > r20 here: https://www.anandtech.com/show/16148/amd-ryzen-5000-and-zen-3-on-nov-5th-19-ipc-claims-best-gaming-cpu/2
> >
> > AMD's claim is 631 @4.8GHz. They measured tigerlake at 595 @4.8Ghz. (A single core at full
> > throttle will be under TDP as per AT article, and I believe that).
>
> Cinebench is a total rubbish benchmark!
>
> David

It’s the only datapoint available as stated earlier. I did not claim it represented anything. All benchmarks are wrong, some benchmarks are useful. Stream is a total rubbish benchmark but gives you some information re. memory subsystem bottlenecks. Spec int is rubbish for big server workloads. spec rate is a memory bandwidth benchmark.. we could go on. Benchmarking/workload selection is junk science in general. they are useful at uncovering bottlenecks in designs. In this case, assuming the numbers are legitimate, there is something about Zen3 that favors it vs. intel TGL. It was not the case for zen 1 and 2 which lagged intel in ST perf. If that tweak is generally useful it may help others too. Or not. BTW, intel recommended cinebench until they changed their mind for some reason very recently. Not that it matters.