Andrei F (andrei.delete@this.anandtech.com) on September 18, 2020 3:39 am wrote:
> Michael S (already5chosen.delete@this.yahoo.com) on September 18, 2020 2:58 am wrote:
> > anon (anon.delete@this.anon.com) on September 17, 2020 7:10 pm wrote:
> > > AnandTech's (SPEC ST performance) review is here: anandtech.com/show/16084/intel-tiger-lake-review-deep-dive-core-11th-gen/8
> > >
> > > All of TigerLake's extra performance over IceLake is due to higher clocks. And it significantly
> > > outperforms the Zen 2 based AMD Renoir chip (Ryzen 7 4800U). However not all is good: TigerLake
> > > experiences a noticeable IPC regression compared to IceLake. The memory subsystem is unable
> > > to keep up with the higher clocks, and the reworked cache is not enough.
> > >
> > > And it just barely beats Apple's A13 despite using significantly more power.
> > > Makes you think the A14 based Mac coming later this year will blow past Intel's
> > > best CPU microarchitecture in single threaded integer performance.
> > >
> > > https://images.anandtech.com/graphs/graph16084/111168.png
> >
> > The picture reminds me of 1951's Arthur C. Clarke classic short story "Superiority".
> >

The ultimate cause of our failure was a simple one: despite all statements to the contrary, it was not
> > due to lack of bravery on the part of our men, or to any fault of the Fleet's. We were defeated by one
> > thing only - by the inferior science of our enemies. I repeat - by the inferior science of our
> > enemies.

> >
> > I mean, minimally tweaked 5 y.o. uArch manufactured on maximally
> > tweaked 6 y.o. process reigns on top of the chart.
>
> The difference that you can't see in that chart between the top 3 positions is that
> it's 40W vs 21W vs 4W. The apparent superiority will come crumbling down soon enough.

Andrei, do you have power draw estimates for the CPUs while running these workloads? I am still not 100% clear on the figures. If I understand your article correctly, Tiger Lake draws 50 watts at 4.8 GHz. Does this mean that the 28W TDP profile actually means 50W power consumption? What confuses me even further is that a Coffee Lake (single core) running at 4.6 GHz only seems to consume around 30watts, I find it hard to believe that Tiger Lake would be a regression in energy efficiency.