Originally posted by coder
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Furthermore the I/O die on matisse CPUs (Ryzen 3xxx) was manufactured on in 12? or 14nm? by Global Foundries, it contains like 32 SerDes and the DDR4 memory Controllers.. Compared to Renoir (single die Zen 2) the Matisse CPUs had a much higher power draw, due to the "old process" I/O die..
In Idle most of the power draw is caused by the platform arround the zen chiplets but not by the cores themself..
The high-end AM5 platform is even more power hungry, 7W per PROM21 chip (two for X670E, one for B650 and A620), so 14W (X670E) instead of 10-11W (X570).
It seems like the they moved to 6nm TSMC for the chipset chip.
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