Over 2,000 mm^2 of eDRAM???

Article: Knights Landing CPU Speculation
By: tarlinian (tarlinian.delete@this.gmail.com), November 26, 2013 11:50 am
Room: Moderated Discussions
Eric Bron (eric.bron.delete@this.zvisuel.privatefortest.com) on November 26, 2013 12:21 pm wrote:
> > we're still looking at over 2,000 mm^2 just for the eDRAM. That seems ... um ... large?
>
> that will be around 300 mm^2 per 1 GB "MCDRAM" stacked die in the 2nd slide here :
> http://vr-zone.com/articles/xeon-phi-knights-series-continues-landing-2015/64112.html
>
>

Based on the data Intel has presented on 22 nm eDRAM presentation the minimum size for 8 billion bits in ~232 mm^2. (This is just based on naively multiplying the unit cell size times 8 billion, which is obviously grossly optimistic.) If you take the reported 128 Mbit macro density (17.5 Mbit/mm^2), you get ~457 mm^2. These are obviously large areas, but not grossly unrealistic, especially on what will be a very mature 22 nm process.
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        Over 2,000 mm^2 of eDRAM???Mark Roulo2013/11/26 09:28 AM
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          Over 2,000 mm^2 of eDRAM???Eric Bron2013/11/26 11:21 AM
            Over 2,000 mm^2 of eDRAM???tarlinian2013/11/26 11:50 AM
              Over 2,000 mm^2 of eDRAM???Eric Bron2013/11/26 01:07 PM
                Over 2,000 mm^2 of eDRAM???Eric Bron2013/11/26 01:09 PM
                Over 2,000 mm^2 of eDRAM???aaron spink2013/11/26 03:03 PM
                  Over 2,000 mm^2 of eDRAM???Eric Bron2013/11/26 11:42 PM
                    Over 2,000 mm^2 of eDRAM???aaron spink2013/11/27 10:31 AM
              Over 2,000 mm^2 of eDRAM???David Kanter2013/11/26 04:25 PM
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