Does m.2 and graphics cards share lanes?

[1982 Original]

I currently have an Asrock ab350m board with a Ryzen 3600... don't judge, it started life with a Ryzen 1200.  My OS is on an nvme m.2 drive, I have a wifi card in the top mini slot, and a graphics card in the full size pcie slot.  My question is, are all of these components sharing the same pool of pci express lanes?  Am I reducing the theoretical bandwidth to the GPU by utilizing an nvme drive and a pcie wifi card?

[badreg]

The M.2* and PCI-E x16 slots have dedicated CPU lanes. All other devices communicate through the chipset.

 

*Edit: If an NVMe drive is installed. A SATA drive would go through the chipset.

[1982 Original]

Just to clarify your answer, the M.2 would have say 4 lanes dedicated to it.  And the graphics cards in the pcie slot still gets its full 16 lanes?

[badreg]

1 minute ago, Bobby Frags said:

Just to clarify your answer, the M.2 would have say 4 lanes dedicated to it.  And the graphics cards in the pcie slot still gets its full 16 lanes?

Yes, Ryzen CPUs have 16+4 direct lanes for GPU and NVMe.

[svmlegacy]

7 minutes ago, Bobby Frags said:

I currently have an Asrock ab350m board with a Ryzen 3600... don't judge, it started life with a Ryzen 1200.  My OS is on an nvme m.2 drive, I have a wifi card in the top mini slot, and a graphics card in the full size pcie slot.  My question is, are all of these components sharing the same pool of pci express lanes?  Am I reducing the theoretical bandwidth to the GPU by utilizing an nvme drive and a pcie wifi card?

Open up GPU-Z and it'll tell you the connection the GPU is at.

[Kilrah]

Yes.

 

[Haro]

9 minutes ago, Bobby Frags said:

bandwidth to the GPU by utilizing an nvme drive and a pcie wifi card?

There's 24 lanes coming out of the 1200, x16 for the GPU and x4 for an m.2. 

[1982 Original]

Perfect.  Thank you for the answers.  I was watching a video about how the Ampere cards can potentially saturate pcie 3.0.  They also threw out there that if you were using an m.2 drive, you're already losing some pcie 3.0 bandwidth to the m.2 making the situation worse. 

[Haro]

Just now, Bobby Frags said:

Ampere cards can potentially saturate pcie 3.0. 

Wait for ampere to actually launch and check, we don't know but x16 gen 3 should be fine for even a 3090 but again, wait for ampere to actually launch and check. 

[1982 Original]

When I saw the video, got me thinking if I would be better off putting my OS on a Sata ssd to free up bandwidth for the graphics card.  But as you all said, the m.2 and the graphics cards each get their own pool of lanes.