[SOLVED] If the 3950x supports PCIE 4.0, would it work with pcie 3.0 parts?

[Pizza PowerXYZ]

I know the 3950x will most likely come out in September
But if a processor supports a pcie that's above the GPU or m.2 would they work?
The 3950x will be am4 socketed so I dont have to change motherboards
But the CPU supports pcie 4.0
Would it even work?
Is it backward compatible?
Help me plz

Because i plan on getting the 3950x

 

[rgd1101]

If the motherboard support the cpu, it will work

 

[SgtScream]

PCI-E 4.0 will be backwards compatible.

 

[drea.drechsler]

I know the 3950x will most likely come out in September
But if a processor supports a pcie that's above the GPU or m.2 would they work?
The 3950x will be am4 socketed so I dont have to change motherboards
But the CPU supports pcie 4.0
Would it even work?
Is it backward compatible?
Help me plz

Because i plan on getting the 3950x

What motherboard do you have or plan to use for it?

 

[Pizza PowerXYZ]

Msi x470 gaming plus

 

[TJ Hooker]

I'm not sure how well that motherboard will be able to handle a 16 core CPU.

The PCIe lanes will only operate at PCIe 3.0 on a 400 series motherboard anyway.

 

[Pizza PowerXYZ]

It is an x470 board

 

[rgd1101]

then it is pcie 3.0

 

[SgtScream]

They mentioned how with a bios update on some motherboards will bring pci-e 4 to 400 series motherboards. Grain of salt....

 

[rgd1101]

last week update said not on 400 series.

 

[SgtScream]

Probably because they don't have that awful chipset fan lol.

 

[TJ Hooker]

PCIe 4.0 was never going to come to the chipset lanes on older boards, the question was whether it might come to the primary x16 and the M.2 x4, which come from the CPU.

Article on why AMD is saying they will be locking that out on 300/400 series boards:
https://www.tomshardware.com/news/amd-pcie-4.0-socket-am4-motherboard,39559.html