PCIe Architecture

[Trinopoty]

I'm a bit confused about how PCIe lanes work in Intel vs AMD.

I'm clear about Intel though, you have some lanes provided by the CPU and some lanes provided by the Chipset and the CPU ones are better than the Chipset ones. Fair enough.

On AMD though, I keep hearing that the motherboard manufacturer has total control over it. But, how does that work? Does it mean that AMD does not provide any PCIe lanes from the CPU and all lanes are from the Chipset?

 

How is the architecture different between Intel and AMD?

[tonymc]

n the range not extreme
Intel:
CPU has 16-line Main PCiexpress, RAM driver, Graphic Controller and bus to communicate with the motherboard chipset
Chipset has SATA controller, Audio, USB Controller, PCI Express lines depending on the chipset range and some other connections

In AMD (Ryzen) the CPU in addition to the RAM controller, 16-line main PCI incorporates other connections that in case of intel are in the chipset. It means that the AMD chipset has migrated some responsibilities to the CPU.