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A comment on The Intel Optane SSD DC P4800X (375GB) Review: Testing 3D XPoint Performance. Parent comment

Re:The Intel Optane SSD DC P4800X (375GB) Review: Testing 3D... by endorphone on Thursday April 20, 2017 @06:13PM (#14161386)
It's turtles all the way down, and I think this is needlessly splitting hairs.

L1->L2->L3->(L4->)DRAM->Storage

3D XPoint is being considered as the DIMM-module, byte-addressed "memory" before storage. Saying that it "augments" DRAM is almost meaningless because we already have multiple levels of DRAM.

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Re:The Intel Optane SSD DC P4800X (375GB) Review: Testing 3D... by davrosthedalek on Thursday April 20, 2017 @06:58PM (#14161642)
If I am not mistaken, we have only one level of DRAM. Caches are SRAM. (Also, DRAM on DIMM is not byte-addressable)
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Re:The Intel Optane SSD DC P4800X (375GB) Review: Testing 3D... by cocoablazing on Thursday April 20, 2017 @11:05PM (#14162809)
The PS2, Xbox 360, Wii, and some intel chips with iris provide on-die DRAM caches.
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