Other (minor) power factors?

By: Paul A. Clayton (paaronclayton.delete@this.gmail.com), December 6, 2021 7:37 am
Room: Moderated Discussions
Adrian (a.delete@this.acm.org) on December 5, 2021 12:07 pm wrote:
> Supposing that the implementation of an ARM core must be much more efficient than that
> of an Intel or AMD core, that implies that the part of the power required for the FPU
> when doing FMAs can be only significantly larger than for Intel, as the FPU must be equivalent,
> unlike other parts, like the instruction decoder, that can be much simpler.
> Therefore I would expect that an ARM V1 core, when doing 2 x 256-bit FMAs, would use 65% to
> 75% of the total core power in the FPU. This FPU power can be smaller than the power needed
> by an Epyc only due to the newer manufacturing process, and, as you say, due to the lower maximum
> frequency target, which can permit the use of fewer/smaller/lower-leakage transistors.

I would guess that quality of implementation is also a factor. Design effort and skill applies at various levels, but a "full custom" design should be better than a "synthesized" design.

I also got the impression that high frequency design involved more effort.

Design goals in terms of yield would also seem to impact the result. If one can accept 50% yield or can sell many different bins, one would presumably design a different processor than if other yield targets applied.

Such factors might be insignificant, but I think such details are interesting.

Sadly my ignorance is especially vast with respect to design (and EE in general).
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TopicPosted ByDate
Some info about the Amazon Graviton 3Adrian2021/12/03 06:51 AM
  Some info about the Amazon Graviton 3Kara2021/12/03 07:01 AM
    Some info about the Amazon Graviton 3---2021/12/03 10:03 AM
      Some info about the Amazon Graviton 3Kara2021/12/03 10:45 AM
  Some info about the Amazon Graviton 3Kara2021/12/03 07:05 AM
    Some info about the Amazon Graviton 3none2021/12/03 07:19 AM
      Some info about the Amazon Graviton 3Kara2021/12/03 07:36 AM
        N2, or V1? Anon2021/12/03 07:52 AM
          N2, or V1? Adrian2021/12/03 09:47 AM
            N2, or V1? Adrian2021/12/03 09:52 AM
              N2, or V1? G2021/12/03 10:25 AM
                N2, or V1? Adrian2021/12/03 11:51 AM
                  N2, or V1? Wilco2021/12/03 02:58 PM
                    N2, or V1? Adrian2021/12/04 03:33 AM
                      N2, or V1? -.-2021/12/04 04:37 AM
                      N2, or V1? Rayla2021/12/04 02:20 PM
                        N2, or V1? Adrian2021/12/05 01:15 AM
                          N2, or V1? dmcq2021/12/05 02:43 AM
                            N2, or V1? Adrian2021/12/05 03:54 AM
                              N2, or V1? ---2021/12/05 11:45 AM
                                N2, or V1? Adrian2021/12/05 01:07 PM
                                  Other (minor) power factors?Paul A. Clayton2021/12/06 07:37 AM
                    N2, or V1? Anon2021/12/04 10:53 PM
                      N2, or V1? Andrei F2021/12/05 04:22 AM
                Only 4 ALUsJörn Engel2021/12/03 07:37 PM
                  Only 4 ALUsWilco2021/12/04 09:54 AM
          N2, or V1? -.-2022/05/24 06:34 AM
            Graviton3 on Chip &CheesePer Hesselgren2022/06/17 06:19 AM
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