More DRAM capacity?

By: Doug S (foo.delete@this.bar.bar), July 22, 2022 11:05 am
Room: Moderated Discussions
Mark Roulo (nothanks.delete@this.xxx.com) on July 22, 2022 9:48 am wrote:
> Ben T (ben.delete@this.noemail.com) on July 22, 2022 5:31 am wrote:
> > > what you describe is not the first, second or third highest priority
> > > things that would need to be solved, for this to be a 'thing'.
> >
> > What are the highest priority things needed for Apple to make a viable server?
> >
> > Three things I think are needed for a viable Apple server are:
> >
> > * inline ECC (Error Correction Code) for the LPDDR DRAM
> > * ECC for the caches and other large RAM blocks
> > * the same amount of verification that Intel and AMD do for their server chips
>
> Higher reliability makes sense.
>
> But, the M1 Ultra maxes out at 128 GB of DRAM.
>
> I don't know enough about the server market, but the servers my
> employer ships often have much more DRAM (1 TB is common).


It is possible to use denser LPDDR. They could manage 1 TB of LPDDR5 with the existing controllers. I expect we'll see some higher density LPDDR5/5X used when Apple releases the new Mac Pro, since 256 GB just isn't a reasonable max when the current x86 version allows for 1.5 TB.

I don't see LPDDR as a reasonable alternative for a server. While replacing RAM isn't a concern (just permanently map out pages where repeated ECC errors occur) the capacity limit probably is.
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Retbleedanonymous22022/07/13 03:14 PM
  Retbleedanon22022/07/13 10:03 PM
    RetbleedAdrian2022/07/14 12:05 AM
    RetbleedAnon42022/07/14 02:17 PM
      Retbleedanon22022/07/14 04:29 PM
        RetbleedAnon42022/07/14 05:05 PM
          Retbleedanon22022/07/14 05:37 PM
            Retbleedanon22022/07/14 06:40 PM
              Retbleeddmcq2022/07/15 04:54 AM
                Retbleedanon22022/07/17 07:17 AM
              RetbleedMichael S2022/07/15 07:08 AM
                RetbleedBen T2022/07/16 05:06 AM
                  RetbleedMichael S2022/07/16 11:41 AM
                    Public cloud infrastructureBen T2022/07/16 04:50 PM
                      Public cloud infrastructureRayla2022/07/16 09:15 PM
                      Public cloud infrastructureme2022/07/17 09:19 AM
                      Public cloud infrastructureBrett2022/07/18 12:38 PM
                        Public cloud infrastructureAdrian2022/07/18 01:19 PM
                          Public cloud infrastructureme2022/07/18 03:54 PM
                          Public cloud infrastructureBrett2022/07/20 03:35 PM
                            Public cloud infrastructureBrett2022/07/21 01:18 PM
                              Public cloud infrastructureinthestratosphere2022/07/21 02:46 PM
                                Public cloud infrastructureBrett2022/07/21 10:38 PM
                                What’s needed for a viable Apple server?Ben T2022/07/22 05:31 AM
                                  What’s needed for a viable Apple server?Michael S2022/07/22 09:09 AM
                                  More DRAM capacity?Mark Roulo2022/07/22 09:48 AM
                                    More DRAM capacity?Doug S2022/07/22 11:05 AM
                                      More DRAM capacity?Mark Roulo2022/07/22 11:20 AM
                                        More DRAM capacity?Doug S2022/07/22 01:48 PM
                                    More DRAM capacity?Wes Felter2022/07/22 04:49 PM
                        Public cloud infrastructureanon22022/07/18 04:25 PM
                      Putting 12 processor packages in a 1U serverBen T2022/07/22 10:02 PM
                        Putting 12 processor packages in a 1U serverrwessel2022/07/23 07:15 AM
                        Putting 12 processor packages in a 1U serverDaniel B2022/07/23 04:15 PM
                          Putting 12 processor packages in a 1U serverBen T2022/07/24 05:29 AM
                            Multi-system cluster design spacePaul A. Clayton2022/07/24 08:49 AM
            RetbleedAnon42022/07/15 03:00 AM
          RetbleedMichael S2022/07/15 06:59 AM
      Retbleed---2022/07/15 11:14 AM
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