Ivy Bridge and stacked DRAM

By: ajensen (.delete@this..), December 30, 2010 3:50 am
Room: Moderated Discussions
David Kanter (dkanter@realworldtech.com) on 12/29/10 wrote:
---------------------------
>According to our friend Charlie, Ivy Bridge will have LPDDR2 stacked to provide
>a low latency and high bandwidth DRAM close to the CPU/GPU. This should significantly
>boost performance and lower power:
>
>http://www.semiaccurate.com/2010/12/29/intel-puts-gpu-memory-ivy-bridge/
>
>The interesting question is whether this is dedicated for the GPU, or for both CPU and GPU.
>
>David
Well this was hardly a bombshell. Tighter integration of more memory just had to happen for both performance and performance/watt reasons.

I'm not sure I see the huge longterm technical benefits of the the silicon imposer though. Short term you get to use commodity DRAM while at the same time not having to conduct heat through the DRAM. I'm guessing that is the number one reason they used it. For a lower power density part it should be just as good to stack the DRAM on top of the CPU/GPU, even better from a cost and performance/watt perspective.

I'm guessing this new trend will make way for faster commodity DRAM stacks for chip stack integration. Perhaps even a standard for "pin passthrough" so that higher power density devices can be stacked on top of DRAM.
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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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