Ivy Bridge and stacked DRAM

By: anon (anon.delete@this.anon.com), December 30, 2010 3:59 pm
Room: Moderated Discussions
Groo (charlie@semiaccurate.com) on 12/30/10 wrote:
---------------------------
>anon (anon@anon.com) on 12/30/10 wrote:
>---------------------------
>>Really? If latency can be significantly better than regular ODMC to main memory,
>>that is pretty big news -- but then why would you call the memory slow?
>>
>
>LPDDR2 caps out at 533/1066. That crawls compared to DDR3. Then again, if you wanted
>to devote the die area and power to it, you could easily slap 4GB of 'slow' LPDDR2
>at 2048b width under the lid of a Westmere/Haswell-EX. Would you give up 1MB of
>L3 for that (picking die tradeoffs out of thin air)? How about 2MB?
>
>On a $5000 server chip, why the )#$(*# not?

Latency is the important issue, you're quoting bandwidths.
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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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