AMD X570 Chipset to Feature 40 PCIe 4.0 Lanes

[TheLostSwede]

40 lines is combined:
CPU - 16 (GPU) + 4 (NVMe) + 4 (downlink to chipset) = 24
Chipset (8+4+4) = 16 (of those 4+4 can be used to extend default 4 SATA config to 6 SATA config - just like in Ryzen 1xxx and 2xxx chipsets)
Together you get 40 lines. It's unfortunately like Intel marketing where they combine CPU and Chipset lines. Sad but true.
B550 according to original story do have PCIEx 4.0 - they are having some problems on some boards, but chipset as it is does have it implemented.

That's not how the SATA works, but ok...

 

[mat9v]

That's not how the SATA works, but ok...

Remember X370 and it's "You can use SATA Express or SATA and free PCIEx lines"?
While SATA is obviously not interchangeable with PCIEx lines, maybe they employ some physical limitation. I agree, that it makes no sense for me either, what with so many ports that would suggest (4+4) and declining SATA Express popularity. Those 4^4 may just mean that somewhere below is an explanation, that PCIEx lines and SATA ports combined can form SATA Express ports...
It does not change how the PCIEx configuration should be "counted" anyway.

 

[TheLostSwede]

Remember X370 and it's "You can use SATA Express or SATA and free PCIEx lines"?
While SATA is obviously not interchangeable with PCIEx lines, maybe they employ some physical limitation. I agree, that it makes no sense for me either, what with so many ports that would suggest (4+4) and declining SATA Express popularity. Those 4^4 may just mean that somewhere below is an explanation, that PCIEx lines and SATA ports combined can form SATA Express ports...
It does not change how the PCIEx configuration should be "counted" anyway.

SATA Express never happened afaik, I don't know of a single drive in retail at least.
Then again, there has never been a really clear explanation from AMD how they do things so...
However, two of the SATA ports have so far, been from the CPU, with the other 4-6 ports being from the chipset (yes, some boards have eight native SATA ports).
But I guess we'll see soon enough how it plays out.