[cc439]

So the chiplet strategy is clearly paying dividends for AMD but I'm curious as to what has changed to have allowed this idea to be so effective? It's not like the concept of multi-die CPUs is new, Intel even implemented this on their legendary Q6600 CPU which was basically 2 Core 2 Duo dies on a single chip. The issue with the approach used with the Q6600 was that communication across cores on separate dies was orders of magnitude slower than communication across the cores sharing a die. Is AMD's success down to recent advancements in brand prediction and core scheduling optimization?

[Dylan16807]

> The issue with the approach used with the Q6600 was that communication across cores on separate dies was orders of magnitude slower than communication across the cores sharing a die. Is AMD's success down to recent advancements in brand prediction and core scheduling optimization?

The biggest problem with the Q6600 is that it was a big hack to communicate over the frontside bus, something designed for nice slow memory access that didn't have the bandwidth or latency for inter-core communication.

Infinity fabric, on the other hand, is good enough that on Zen 2 they didn't even bother to directly connect the two CCX that share a die.