[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.