28+ W

By: Alberto (git.delete@this.git.it), April 20, 2020 9:07 am
Room: Moderated Discussions
Anon (no.delete@this.spam.com) on April 19, 2020 8:47 pm wrote:
> David Kanter (dkanter.delete@this.realworldtech.com) on April 19, 2020 7:27 pm wrote:
> > I have no interest in 8C chips for client systems. 4C/8T is pretty much optimal.
> >
> > This gets at the fundamental problem for AMD. More cores is
> > valuable for some servers, and almost no client systems.
> >
> > As an educated consumer, I want a small number of fast cores.
> >
> > David
>
> AMD cores are not slow, so what's the problem in having more of them?

The problem having more of them is heat.
Ask to yourself why AMD don't manufacture a serious 4C/8T Renoir, pretty perfect in small designs like convertibles, yes there is a 4C/8T but with bad clock speed....pretty useless.

Unfortunately AMD was a liar, their 15W 8C/16T SKUS are 25 W definitively not 15W. In fact in their slides they say 15W BUT the clock speed are not nominal but "UP TO". The Renoir U serie have a power range "UP TO" 25W, being the listed clock speeds "UP TO", everyone can assume the claimed base and peak clock speed are at 25 W.
After all AMD admitted that Renoir SOC have around 20% less power than Picasso that is "UP TO" 35W.

Obviously AMD can not pack 8 cores and a powerful GPU in only 15W, even on 7nm.

In my knowledge all Renoir U Laptops available are set at 25W(+chipset) and all Renoir H laptops show a power consumption that is well in line with the higher IPC of the cores.
Looking at recent articles there is not a big difference between a 45W Renoir H for gamers and a 45 W 8C/16T Coffee Lake H for gamers too. There is a small difference in performance but nothing of dramatic. On CB they are neck to neck. The battery live at the same capacity is similar.
There is a downside, AMD Laptops for gamers are very noisy, because the power density of 7nm is much whorse of 14nm SKUs, and the cooling solution is in a disasvantage state.

About the number of cores for a U Laptop, obviously 4C/8T are a far better solution, it gives higher base clocks and turbo in a situation of Windows 10 Home that is not a marvel over 8 Threads.
Not to mention responsitiveness, clearly a fast single core turbo at +5GHz makes the Laptop more snappy on average workloads.

Still the Intel decision to stay on 14nm is all about volume, Intel can supply a pile of SKUs to OEMs, AMD nope unfortunately because TSMC is pretty busy this year and yields are not stellar at all.

Last thing Intel 14nm++ is absolutely great at lower voltages, only a little worse than 7nm. Kudos !!!


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TopicPosted ByDate
Tiger lake leak, Intel 10nm fixed?Tiger Lake Leaks2020/04/14 09:30 AM
  Tiger lake leak, Intel 10nm fixed?anon2020/04/14 08:08 PM
    Tiger lake leak, Intel 10nm fixed?Wes Felter2020/04/15 02:46 PM
      Keep in mind Intel supposedly fixed their 10nm process at the same time TSMC is ramping up 5nm (NT)anon2020/04/23 10:14 PM
  28+ Wme2020/04/15 07:42 PM
    28+ WDavid Kanter2020/04/17 09:12 AM
      28+ Wanother anon2020/04/17 11:13 PM
        28+ WDummond D. Slow2020/04/18 09:27 AM
          28+ WDavid Kanter2020/04/19 07:27 PM
            28+ WAnon2020/04/19 08:47 PM
              28+ WDavid Kanter2020/04/19 09:50 PM
                28+ Wanny2020/04/20 05:56 AM
                28+ WAnon2020/04/20 08:03 AM
                28+ Wwumpus2020/04/20 02:39 PM
                  EPYC F lineAnon2020/04/20 05:35 PM
              28+ Wgallier22020/04/19 11:44 PM
              28+ WAlberto2020/04/20 09:07 AM
                28+ WAdrian2020/04/20 09:55 AM
                28+ WAnon2020/04/20 02:18 PM
                  28+ WAnon32020/04/20 04:02 PM
                  28+ WDummond D. Slow2020/04/20 09:05 PM
            28+ WAdrian2020/04/20 03:54 AM
            This was a comparison to put the "high clock" in contextDummond D. Slow2020/04/20 08:55 AM
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