eDRAM is DRAM in a logic-oriented process

Article: Knights Landing CPU Speculation
By: Paul A. Clayton (paaronclayton.delete@this.gmail.com), November 27, 2013 7:10 am
Room: Moderated Discussions
Eric (eric.kjellen.delete@this.gmail.com) on November 27, 2013 3:54 am wrote:
[snip]
> But wouldn't the term MCDRAM (this was suggested in a different branch of the discussion
> to mean Multi-Chip DRAM) point toward something like the Hybrid Memory Cube, i.e. stacked
> memory? Why would it be eDRAM if it's not on the same die as the cores?

The term eDRAM is often used to describe a DRAM build in a logic-oriented process even if the memory is not 'embedded' with any more logic than in a conventional DRAM (much less something liked 3D-RAM which included integer ALUs to reduce bandwidth use in streamed read-modify-write operations associated with graphics).

eDRAM also typically sacrifices density for performance (relative to conventional DRAM), so it would not be surprising if the term came to be used to simply mean fast lower-density DRAM.

Of course, being in a logic-friendly process encourages the use of more logic. (Two obvious logic additions would be supporting on-chip tag comparison to facilitate flexible configuration as cache or fast memory without requiring on-CPU-chip tags and supporting common bandwidth-limited operations [like 3D-RAM].)
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