64 bit LPDDR2 is enough for Ivy's 24EU IGP...

By: Hans de Vries (all.spam.to.delete@this.nowhere.com), December 30, 2010 11:54 pm
Room: Moderated Discussions
Groo (charlie@semiaccurate.com) on 12/30/10 wrote:
---------------------------
>anon (anon@anon.com) on 12/30/10 wrote:
>---------------------------
>>>
>>>On a $5000 server chip, why the )#$(*# not?
>>
>>Latency is the important issue, you're quoting bandwidths.
>>
>Yeah, that is true, but if your application is a GPU that is fairly latency insensitive,
>or problems that are able to hide latency better, you win with a BIG L4/5/whatever.
>
>It isn't a cure-all, but it doesn't hurt, especially if the apps you are running are aware of it.
>
>-Charlie


Ivy Bridge's small 24 EU integrated GPU is decently
served with the industry standard 1,066 MHz LPDDR2
64 bit dual channel form factor as will be used by
100+ million mobile devices.

All iPhone's and iPad's use 64 bit dual channel POP
(package on package) and they are upgrading to LPDDR2.
LPDDR2 is an *interface* standard and not a custom
DRAM interconnect scheme. This means that bus widths
are physically fixed.

I would expect history to repeat itself and to see
22nm start with smaller (reasonable yield) devices
and in such a scheme a dual channel 64bit packaging
solution would make sense.

The smallest LPDDR2 configuration with the now sampling
4Gbit devices is one Gigabyte while Samsung and others
will offer 2 Gigabyte options later on in 2011.

I don't expect Intel to adventure in memory stacking
manufacturing at all since it it's well known that
they are trailing the DRAM/Flash industry. They are
(together with Micron) missing out on the mobile flash
market since they can't provide for instance the 8 die
NAND stacks which Apple uses from Samsung and Toshiba.


Regards, Hans

< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Ivy Bridge and stacked DRAMDavid Kanter2010/12/29 02:06 PM
  Ivy Bridge and stacked DRAMGroo2010/12/29 04:31 PM
    Ivy Bridge and stacked DRAMRohit2010/12/30 12:02 AM
      Ivy Bridge and stacked DRAMGroo2010/12/30 01:20 PM
    Ivy Bridge and stacked DRAManon2010/12/30 03:26 AM
      Ivy Bridge and stacked DRAMGroo2010/12/30 01:23 PM
        Ivy Bridge and stacked DRAManon2010/12/30 03:59 PM
          Ivy Bridge and stacked DRAMGroo2010/12/30 07:24 PM
            64 bit LPDDR2 is enough for Ivy's 24EU IGP...Hans de Vries2010/12/30 11:54 PM
              64 bit LPDDR2 is enough for Ivy's 24EU IGP...Groo2011/01/01 01:07 PM
                64 bit LPDDR2 is enough for Ivy's 24EU IGP...Hans de Vries2011/01/07 06:27 PM
              64 bit LPDDR2 is enough for Ivy's 24EU IGP...IntelUser20002011/01/03 05:28 AM
          Ivy Bridge and stacked DRAMJouni Osmala2011/01/04 12:39 AM
        Ivy Bridge and stacked DRAManon2010/12/30 03:59 PM
  Ivy Bridge and stacked DRAMEuronymous2010/12/29 10:35 PM
    TSV + interposerDavid Kanter2010/12/29 11:36 PM
      TSV + interposerEuronymous2010/12/30 06:25 AM
      TSV + interposerarf2010/12/30 12:11 PM
        TSV dimensions vs. metal layersDavid Kanter2010/12/30 12:33 PM
          TSV dimensions vs. metal layersarf2010/12/30 03:24 PM
            TSV dimensions vs. metal layersDavid Kanter2010/12/30 06:10 PM
        TSV + interposerGroo2010/12/30 02:08 PM
          TSV + interposerDavid Kanter2010/12/30 02:45 PM
            TSV + interposerGroo2010/12/30 07:22 PM
    Ivy Bridge and stacked DRAMGroo2010/12/30 01:26 PM
  Ivy Bridge and stacked DRAMajensen2010/12/30 03:50 AM
  512-bit without TSV?M.Isobe2010/12/30 06:47 AM
    Multiple interposers are needed for ultra-wide interfaceM.Isobe2010/12/30 07:12 AM
  Stacked DRAM: Good for what it is intendedWill Smith2011/01/03 05:37 AM
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