Much faster iGPU clock ... or not :-)

Article: Intel's Haswell CPU Microarchitecture
By: Mark Roulo (nothanks.delete@this.xxx.com), December 13, 2012 8:11 am
Room: Moderated Discussions
Exophase (exophase.delete@this.gmail.com) on December 12, 2012 11:46 pm wrote:
> Mark Roulo (nothanks.delete@this.xxx.com) on December 12, 2012 3:53 pm wrote:
> > Maybe this is new only to me, but the iGPU clock speed seems to have
> > almost doubled in Haswell compared to Ivy Bridge: 1250 vs. 650.
> >
> > *IF* Intel has also increased the iGPU in other ways (widening it, whatever ...) *AND*
> > can solve the bandwidth starvation issue (Crystalwell maybe??), then it looks like
> > the iGPU could easily double or more the performance compared to Ivy Bridge.
> >
> > More pressure on AMD and the low end discrete cards ...
> >
>
> If the leaked numbers are correct it's possible that they refer to turbo frequency, not base frequency.
> The column title "dynamic frequency" does imply this. In this case it's only a little bit higher than the
> highest bin on IB (1.15GHz), and lower that the highest bin on SB (1.35Hz). Combined with a higher EU count
> (20 vs 16) that gives a peak 35.9% improvement, given no other adjustments. In practice it'd tend to be
> less if the TMU capabilities haven't changed and due to main memory bandwidth staying the same.

I think you are right.

I thought that dynamic frequency was a strange name for GPU base frequency :-)

So maybe we only get ~30% GPU improvement ... which means that we don't need a story about the iGPU not getting killed by memory bandwidth.
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TopicPosted ByDate
Haswell CPU article onlineDavid Kanter2012/11/13 02:43 PM
  Haswell CPU article onlineEric2012/11/13 03:10 PM
    Haswell CPU article onlinehobold2012/11/13 04:13 PM
      Haswell CPU article onlineRicardo B2012/11/13 05:09 PM
    Haswell CPU article onlineanonymou52012/11/13 04:44 PM
      Haswell CPU article onlinenone2012/11/14 02:40 AM
  Haswell CPU article onlinetarlinian2012/11/13 03:56 PM
    Fixed (NT)David Kanter2012/11/13 05:06 PM
      Haswell CPU article onlineJacob Marley2012/11/14 01:18 AM
  Haswell CPU article onlinerandomshinichi2012/11/14 01:53 AM
    LLC == Last Level Cache (usually L3) (NT)Paul A. Clayton2012/11/14 04:50 AM
    Haswell CPU article onlineJoe2012/11/14 09:38 AM
      LLC vs. L3 vs. L4David Kanter2012/11/14 10:09 AM
        LLC vs. L3 vs. L4; LLC = Link Layer ControllerRay2012/11/14 09:08 PM
          A pit there are only 17000 TLAs... (NT)EduardoS2012/11/15 02:14 AM
  Haswell CPU article onlineanon2012/11/14 04:10 AM
    Move elimination can be a µop fusionPaul A. Clayton2012/11/14 05:41 AM
      That should be "mov R10 <- R9"! (NT)Paul A. Clayton2012/11/14 05:43 AM
      Move elimination can be a µop fusionanon2012/11/14 06:25 AM
        It does avoid the scheduler (NT)Paul A. Clayton2012/11/14 07:47 AM
      Move elimination can be a µop fusionStubabe2012/11/14 12:43 PM
        Move elimination can be a µop fusionanon2012/11/14 08:33 PM
          Move elimination can be a µop fusionFelid2012/11/14 11:49 PM
            Move elimination can be a µop fusionanon2012/11/15 12:23 AM
              Move elimination can be a µop fusionStuart2012/11/15 04:04 AM
                Move elimination can be a µop fusionStubabe2012/11/15 04:14 AM
                  Move elimination can be a µop fusionanon2012/11/15 04:48 AM
                    Move elimination can be a µop fusionEduardoS2012/11/15 05:00 AM
                      Move elimination can be a µop fusionanon2012/11/15 05:14 AM
                        Move elimination can be a µop fusionEduardoS2012/11/15 05:21 AM
                          Move elimination can be a µop fusionanon2012/11/15 05:31 AM
                    Move elimination can be a µop fusionStubabe2012/11/15 10:38 AM
                      There can be only one dependencePaul A. Clayton2012/11/15 11:50 AM
                    Move elimination can be a µop fusionFelid2012/11/15 02:19 PM
                      Move elimination can be a µop fusionanon2012/11/16 03:07 AM
                        Move elimination can be a µop fusionFelid2012/11/16 06:43 PM
                  Move elimination can be a µop fusionFelid2012/11/15 01:50 PM
                    Move elimination can be a µop fusionFelid2012/11/15 02:03 PM
                      Correction!Felid2012/11/19 12:23 AM
                    Thanks, I wasn't aware of the change in SB. Good to know... (NT)Stubabe2012/11/15 02:43 PM
            Move fusion assumes adjacencyPaul A. Clayton2012/11/15 06:15 AM
              Move fusion assumes adjacencyFelid2012/11/15 01:40 PM
        Move elimination can be a µop fusionPatrick Chase2012/11/21 10:52 AM
          Move elimination can be a µop fusionPatrick Chase2012/11/21 11:12 AM
    Haswell CPU article onlineRicardo B2012/11/14 08:12 AM
  Haswell CPU article onlinegmb2012/11/14 07:28 AM
  Haswell CPU article onlineFelid2012/11/14 10:58 PM
    Haswell CPU article onlineDavid Kanter2012/11/15 08:59 AM
      Haswell CPU article onlineFelid2012/11/15 01:15 PM
        Instruction queueDavid Kanter2012/11/16 11:23 AM
          Instruction queueFelid2012/11/16 12:05 PM
  128-bit division unit?Eric Bron2012/11/16 03:57 AM
    128-bit division unit?David Kanter2012/11/16 07:59 AM
      128-bit division unit?Eric Bron2012/11/16 08:47 AM
        128-bit division unit?Felid2012/11/16 11:46 AM
          128-bit division unit?Eric Bron2012/11/16 12:24 PM
            128-bit division unit?Felid2012/11/16 06:19 PM
              128-bit division unit?Eric Bron2012/11/18 07:41 AM
            128-bit division unit?Michael S2012/11/17 11:50 AM
              128-bit division unit?Felid2012/11/17 12:44 PM
                128-bit division unit?Michael S2012/11/17 01:45 PM
                  128-bit division unit?Felid2012/11/17 04:49 PM
                    128-bit division unit?Michael S2012/11/17 05:56 PM
              128-bit division unit?Eric Bron2012/11/18 07:35 AM
  Haswell CPU article onlineJim F2012/11/18 08:45 AM
    Haswell CPU article onlineGabriele Svelto2012/11/18 11:52 AM
  Probable bottleneckLaurent Birtz2012/11/23 12:45 PM
    Probable bottleneckEduardoS2012/11/23 12:58 PM
      Probable bottleneckLaurent Birtz2012/11/24 09:10 AM
    Probable bottleneckStubabe2012/11/25 02:08 AM
      Probable bottleneckEduardoS2012/11/25 07:15 AM
        Probable bottleneckStubabe2012/11/28 03:36 PM
          Urgh. Post got mangled by LESS THAN signStubabe2012/11/28 03:41 PM
          Probable bottleneckLaurent Birtz2012/11/29 07:34 AM
  Haswell CPU article onlineMr. Camel2012/11/28 02:47 PM
    Haswell CPU article onlineEduardoS2012/11/28 03:06 PM
      Haswell CPU article onlineMr. Camel2012/11/28 06:23 PM
        Haswell CPU article onlineEduardoS2012/11/28 06:27 PM
          Haswell CPU article onlineMr. Camel2012/12/12 12:39 PM
            Much faster iGPU clock ...Mark Roulo2012/12/12 02:53 PM
              Much faster iGPU clock ...Exophase2012/12/12 10:46 PM
                Much faster iGPU clock ... or not :-)Mark Roulo2012/12/13 08:11 AM
                  Much faster iGPU clock ... or not :-)EduardoS2012/12/13 09:38 PM
                    Much faster iGPU clock ... or not :-)Michael S2012/12/14 04:33 AM
                      Much faster iGPU clock ... or not :-)EduardoS2012/12/14 06:06 AM
                        Much faster iGPU clock ... or not :-)Doug S2012/12/14 11:13 AM
                          Much faster iGPU clock ... or not :-)EduardoS2012/12/14 11:43 AM
                  Much faster iGPU clock ... or not :-)Mr. Camel2012/12/14 09:50 AM
              Much faster iGPU clock ...Michael S2012/12/13 01:44 AM
                Much faster iGPU clock ...Mark Roulo2012/12/13 08:09 AM
  Haswell CPU article onlineYang2012/12/09 07:28 PM
    possible spam bot? (NT)I.S.T.2012/12/10 02:40 PM
  CPU Crystal Well behavior w/ eGPU?Robert Williams2013/04/17 01:16 PM
    CPU Crystal Well behavior w/ eGPU?Nicolas Capens2013/04/17 02:30 PM
      CPU Crystal Well behavior w/ eGPU?RecessionCone2013/04/17 03:20 PM
        CPU Crystal Well behavior w/ eGPU?Robert Williams2013/04/17 06:37 PM
    CPU Crystal Well behavior w/ eGPU?Eric Bron2013/04/17 08:10 PM
  Haswell CPU article onlineSireesh2014/09/01 01:48 PM
    Haswell CPU article onlineMaynard Handley2014/09/01 02:51 PM
      Great postDavid Kanter2014/09/01 06:12 PM
      Thanks :)Alberto2014/09/02 12:42 AM
      Thanks (NT)Poindexter2014/09/02 08:31 AM
    Haswell CPU article onlineEduardoS2014/09/01 03:21 PM
  Haswell CPU article onlineAlbert2015/10/06 12:48 AM
    Haswell CPU article onlineMichael S2015/10/06 01:10 AM
    Haswell CPU article onlineSHK2015/10/06 02:51 AM
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