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Isn't unified memory* a crucial part in avoiding signal integrity problems? Servers do have many channels but they run relatively slower memory * Specifically
by oDot 2y ago
Isn't unified memory* a crucial part in avoiding signal integrity problems?
Servers do have many channels but they run relatively slower memory
* Specifically, it being on-die
- wtallis 2y ago"Unified memory" doesn't really imply anything about the memory being located on-package, just that it's a shared pool that the CPU, GPU, etc. all have fast access to. Also, DRAM is never on-die. On-package, yes, for Apple's SoCs and various other products throughout the industry, but DRAM manufacturing happens in entirely different fabs than those used for logic chips.
- kube-system 2y agoSystem memory DRAM never is, but sometimes DRAM is technically included on CPU dies as a cache https://en.wikipedia.org/wiki/EDRAM https://en.wikipedia.org/wiki/EDRAM
- wtallis 2y agoIt's mostly an IBM thing. In the consumer space, it's been in game consoles with IBM-fabbed chips. Intel's use of eDRAM was on a separate die (there was a lot that was odd about those parts).