Superiority

By: Andrei F (andrei.delete@this.anandtech.com), September 18, 2020 3:47 am
Room: Moderated Discussions
Robert Müller (Mueller.delete@this.mueller.com) on September 18, 2020 3:59 am wrote:
> 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.
>

Those are the figures, TGL single-core power is around 20-21W-ish at 4.8G.

The 50W figure is multi-core for a limited period of time before it throttles down to TDP levels at 15/28W sustained (with subsequently lower clocks). Comet Lake (10900K) is 40W-ish single-core at 5.3GHz. Essentially the new 10nm parts and new architecture is about double the efficiency of the 14nm Skylake parts.
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              MKPI ? MPKI ? HPKI ? (NT)Michael S2020/09/21 06:03 AM
                MKPI ? MPKI ? HPKI ?Anon2020/09/21 06:22 AM
                  thank you (NT)Michael S2020/09/21 06:42 AM
                  MKPI ? MPKI ? HPKI ?none2020/09/22 12:12 AM
              SPEC Memory traffic & bandwidthAndrei F2020/09/21 07:35 AM
                SPEC Memory traffic & bandwidthAndrei F2020/09/21 07:36 AM
                  SPEC Memory traffic & bandwidthDavid Kanter2020/09/21 01:31 PM
                What is the meaning of multiple rows in few subtests? (NT)Michael S2020/09/21 07:45 AM
                  What is the meaning of multiple rows in few subtests?Andrei F2020/09/21 07:57 AM
            Poor L1D load bandwidthEric Bron2020/09/21 05:56 AM
              erratumEric Bron2020/09/21 05:59 AM
              Sorry I missread the graphEric Bron2020/09/21 06:14 AM
              Poor main memory load bandwidthMichael S2020/09/21 06:19 AM
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              Tiger Lake performance profileAndrei F2020/09/22 06:03 AM
    Tiger Lake security fixes possible cause?Kevin G2020/09/22 05:10 AM
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  SuperiorityMichael S2020/09/18 01:58 AM
    SuperiorityAndrei F2020/09/18 02:39 AM
      SuperiorityRobert Müller2020/09/18 02:59 AM
        SuperiorityAndrei F2020/09/18 03:47 AM
          SuperiorityRobert Müller2020/09/18 04:45 AM
            SuperiorityAndrei F2020/09/18 05:17 AM
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          SuperiorityMichael S2020/09/18 06:08 AM
      SuperiorityDavid Hess2020/09/18 11:55 AM
    SuperiorityAdrian2020/09/18 04:56 AM
      SuperiorityMichael S2020/09/18 06:51 AM
        SuperiorityAdrian2020/09/18 08:35 AM
          SuperioritythePirate2020/09/19 01:28 AM
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