[wtallis]

"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]

System memory DRAM never is, but sometimes DRAM is technically included on CPU dies as a cache

https://en.wikipedia.org/wiki/EDRAM

[wtallis]

It'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).