Interesting Zen IPC benchmarks

By: juanrga (, November 23, 2020 1:16 pm
Room: Moderated Discussions
Chester ( on November 22, 2020 8:53 pm wrote:
> juanrga ( on November 22, 2020 6:09 am wrote:
> > Chester ( on November 21, 2020 2:49 pm wrote:
> > > > They are testing some overclocked chips, not getting IPC on stock settings,
> > >
> > > You can see perf at stock setting in regular reviews.
> >
> > Most regular reviews tested Zen on non-stock settings. But what is relevant
> > to this thread is the above IPC comparison isn't measuring stock IPCs.
> So there are two interesting data points: IPC at stock clocks, and IPC at identical clocks.
> IPC at stock clocks will naturally favor lower clocked CPUs, because memory latency
> will be lower in terms of clocks. Because of that, I think measuring IPC at identical
> clocks is better if you're trying to directly compare architecture.
> IPC scaling with clock speed should be tested separately, but they'd need performance
> counters to account for DVFS and sadly most review sites don't do that.

This is wrong and debunked often in this forum, but it wasn't my point, so I will ignore it.

Take the 1800X as example. Stock RAM is 2667MHz and in Zen µarch MEMCLK and DFICLK are tied, which implies when you overclock the RAM, you are overclocking IF. This means independently of the core clock the CPU is no more in stock settings. In this review memory and IF were overclocked by 20% increasing IPC over stock configuration.

> > > > and
> > > > the choice of applications is too narrow: rendering, rendering, rendering,...
> > >
> > > Try scrolling down a bit. The little bar on the right of your browser window can do that - try dragging
> > > it down or pushing the down arrow at the bottom, and you'll see a whole lot more than rendering.
> > >
> > > There's compression, gaming, video editing, image editing, as well as a couple
> > > of synthetics.
> >
> > The author of the review differentiates between "games" and "applications"; it would
> > be a bit weird if I add gaming when discussing his applications results. Yes, there
> > is compression, this was included in the ellipsis that I wrote above.
> Nice, you've picked up compression and rendering. Now try scrolling down more :) If you
> keep hitting the down arrow, the page will keep scrolling and you'll see more results like
> video/image editing. Keep going until the little bar on the right reaches the bottom.

Thanks for the tip! Now, if you apply it to yourself and scroll down to the end of my former message, you can verify that I read the whole review. Hint: "CPU tests".

> > > Not the most complete coverage, but miles better than SPEC.
> >
> > Whatever you say, but the review is rather irrelevant to get the average IPC,
> > because it is comparing stock vs non-stock, using a very narrow choice of application
> > workloads
> Number of useful SPEC subtests: 1.5 (counting GCC as 1, blender as 0.5 because you don't like rendering)

This is not about liking or disliking rendering. This is about offering a wide selection of different workloads in order to obtain an average IPC, instead testing rendering, rendering, rendering, did we test rendering?

> > and not providing full CPU tests in the gaming measurements.
> What's not 'full' about CPU tests in the gaming measurements?

1080p is not a full CPU test.
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TopicPosted ByDate
Interesting Zen IPC benchmarksAdrian2020/11/21 08:14 AM
  Interesting Zen IPC benchmarksjuanrga2020/11/21 10:22 AM
    Interesting Zen IPC benchmarksChester2020/11/21 03:49 PM
      Interesting Zen IPC benchmarksAndrei F2020/11/22 05:08 AM
        Interesting Zen IPC benchmarksChester2020/11/22 09:33 PM
          Interesting Zen IPC benchmarksnone2020/11/23 01:59 AM
            Interesting Zen IPC benchmarksnone2020/11/23 02:01 AM
              Interesting Zen IPC benchmarksnone2020/11/23 02:01 AM
          No...David Kanter2020/11/23 08:16 AM
            No...Chester2020/11/23 03:15 PM
              No...Foo_2020/11/24 03:34 AM
                No...Chester2020/11/25 12:45 AM
                  No...Per Hesselgren2020/11/25 01:57 AM
                  No...Adrian2020/11/25 04:21 AM
          Interesting Zen IPC benchmarksDoug S2020/11/23 01:03 PM
            Interesting Zen IPC benchmarksChester2020/11/23 03:26 PM
              Programs people useFoo_2020/11/24 03:43 AM
                Programs people useJukka Larja2020/11/24 07:07 AM
                Cinebench is the new Dhrystone :) (NT)none2020/11/25 01:10 AM
              Interesting Zen IPC benchmarksjuanrga2020/11/24 08:38 AM
          Interesting Zen IPC benchmarksAndrei F2020/11/24 05:47 AM
            Interesting Zen IPC benchmarksChester2020/11/25 12:32 AM
              Questionable thoughtsbenchmark critic2020/11/25 08:41 AM
                Questionable thoughtsChester2020/11/25 03:14 PM
                Questionable thoughtsnone2020/11/26 01:14 AM
                  Links?benchmark critic2020/11/26 09:48 AM
              Interesting Zen IPC benchmarksGroo2020/11/25 01:48 PM
                Interesting Zen IPC benchmarksChester2020/11/25 04:36 PM
                  Interesting Zen IPC benchmarksGroo2020/11/26 02:46 PM
                    Interesting Zen IPC benchmarksChester2020/11/26 07:32 PM
                      Interesting Zen IPC benchmarksGroo2020/11/27 10:27 AM
                        Interesting Zen IPC benchmarksChester2020/11/29 07:16 AM
                          Interesting Zen IPC benchmarksGroo2020/11/29 09:56 AM
                            Interesting Zen IPC benchmarksChester2020/11/29 04:41 PM
                Interesting Zen IPC benchmarksRayla2020/11/26 07:46 AM
                  BenchmarksDavid Kanter2020/11/26 10:05 AM
                    Benchmarksblaine2020/11/26 01:04 PM
          Interesting Zen IPC benchmarksPer Hesselgren2020/11/24 10:11 AM
            Interesting Zen IPC benchmarksChester2020/11/25 12:42 AM
      Interesting Zen IPC benchmarksjuanrga2020/11/22 07:09 AM
        Interesting Zen IPC benchmarksChester2020/11/22 09:53 PM
          Interesting Zen IPC benchmarksjuanrga2020/11/23 01:16 PM
            Interesting Zen IPC benchmarksChester2020/11/23 02:27 PM
              Interesting Zen IPC benchmarksjuanrga2020/11/24 08:25 AM
            Interesting Zen IPC benchmarksAdrian2020/11/24 11:51 AM
              Interesting Zen IPC benchmarksjuanrga2020/11/26 04:52 AM
  The Stilt's Zen 3 IPC benchmarksDummond D. Slow2020/11/25 09:29 AM
    The Stilt's Zen 3 IPC benchmarksChester2020/11/25 04:49 PM
      The Stilt's Zen 3 IPC benchmarksDummond D. Slow2020/11/25 05:58 PM
        The Stilt's Zen 3 IPC benchmarksDoug S2020/11/26 09:19 AM
      The Stilt's Zen 3 IPC benchmarksDummond D. Slow2020/11/25 06:13 PM
        The Stilt's Zen 3 IPC benchmarksChester2020/11/26 11:24 AM
          The Stilt's Zen 3 IPC benchmarksitsmydamnation2020/11/26 03:06 PM
            The Stilt's Zen 3 IPC benchmarksChester2020/11/26 07:10 PM
            The Stilt's Zen 3 IPC benchmarksDoug S2020/11/27 04:17 PM
      The Stilt's Zen 3 IPC benchmarksjuanrga2020/11/26 05:10 AM
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