Intel is bringing HBM to CPUs after all

By: Robert Williams (crispysilicon.delete@this.gmail.com), November 21, 2020 4:46 pm
Room: Moderated Discussions
Michael S (already5chosen.delete@this.yahoo.com) on November 4, 2020 12:45 am wrote:
> Robert Williams (crispysilicon.delete@this.gmail.com) on November 3, 2020 8:47 am wrote:
> > Paul (pavel.delete@this.noa-labs.com) on November 3, 2020 1:51 am wrote:
> > > Intel Sapphire Rapids: MCM Design, 56 Golden Cove Cores, 64GB HBM2 On-Board Memory
> > >
> > >
The Saphhire Rapids CPUs will contain 4 HBM2 stacks with a maximum memory of 64 GB (16GB each). The total
> > > bandwidth from these stacks will be 1 TB/s. According to Matthew's source, HBM2 and GDDR5 will be able to
> > > work together in flat, caching/2LM and hybrid modes. The
> > > presence of memory so near to the die would do absolute
> > > wonders for certain workloads that require huge data sets and will basically act as an L4 cache.

> > >
> > >
> > >
> >
> > Crystal Well on HBM, delicious.
> >
> > Also excited for the DDR5 and CXL.
>
> Crystal Well had both latency and bandwidth advantages.
> HBM is only bandwidth and most likely it would be rare that CPU cores will be able to take advantage of extra
> bandwidth. For a single core or a few cores most likely there would be no measurable improvement at all.
>
> IMHO, it is intended mostly for big supercomputers that would have HBM as the
> main memory, with no traditional DDR at all. 64 GB per 56 cores is tiny for normal
> server workloads, but sufficient for at least part of supercomputer.
>

https://www.renesas.com/br/en/doc/products/memory/r10ds0281ej0001_memory.pdf

Persisant memory added with CXL 2.0 spec.
< Previous Post in Thread 
TopicPosted ByDate
Intel is bringing HBM to CPUs after allPaul2020/11/03 01:51 AM
  Intel is bringing HBM to CPUs after allAnon2020/11/03 02:40 AM
    Intel is bringing HBM to CPUs after allGroo2020/11/03 08:53 AM
      Intel is bringing HBM to CPUs after allJacob Marley2020/11/03 11:16 PM
  Intel is bringing HBM to CPUs after allRobert Williams2020/11/03 08:47 AM
    Intel is bringing HBM to CPUs after allMichael S2020/11/04 12:45 AM
      Intel is bringing HBM to CPUs after allFoo_2020/11/04 03:24 AM
        Intel is bringing HBM to CPUs after alltarlinian2020/11/04 07:09 AM
          Intel is bringing HBM to CPUs after allanonymou52020/11/04 04:55 PM
          Intel is bringing HBM to CPUs after allDavid Kanter2020/11/04 06:44 PM
            Intel is bringing HBM to CPUs after allJacob Marley2020/11/04 11:02 PM
      Intel is bringing HBM to CPUs after allwumpus2020/11/04 08:35 AM
      Intel is bringing HBM to CPUs after allRobert Williams2020/11/21 04:46 PM
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