According to Orin NX datasheet, all pcie ports are Gen4 capable. On a custom carrier board, I have a Gen4 (x1) ethernet module connected to pcie controller 1. However it is only running at link speed of 8GT/s. Lspci hows the following for the controller: 0001:00:00.0 PCI bridge: NVIDIA Corporation Device 229e (rev a1) (prog-if 00 [Normal decode]) LnkCap: Port #0, Speed 8GT/s, Width x1, ASPM not supported LnkSta: Speed 8GT/s (ok), Width x1 (ok) The ethernet module: 0001:01:00.0 Ethernet controller: Aquantia Corp. Device 94c0 (rev 03) LnkCap: Port #0, Speed 16GT/s, Width x2, ASPM not supported LnkSta: Speed 8GT/s (downgraded), Width x1 (downgraded) How would I “convince” the controller to allow Gen4 link speeds? full lspci output (9.6 KB)

Which JetPack you’re using? Could you try with JetPack 5.1.2?

Okay, the nearest day I can get around to test this is on friday, so I’ll let you know then.

That solved the issue! Thanks. 0001:00:00.0 PCI bridge: NVIDIA Corporation Device 229e (rev a1) (prog-if 00 [Normal decode]) LnkCap: Port #0, Speed 16GT/s, Width x1, ASPM not supported LnkSta: Speed 16GT/s (ok), Width x1 (ok) 0001:01:00.0 Ethernet controller: Aquantia Corp. Device 94c0 (rev 03) LnkCap: Port #0, Speed 16GT/s, Width x2, ASPM not supported LnkSta: Speed 16GT/s (ok), Width x1 (downgraded)

Orin NX pci controller running at 8GT/s with a 16GT/s capable device

Robotics & Edge Computing Jetson Systems Jetson Orin NX

DaneLLL August 16, 2023, 2:30am 4

Hi,
Please use Jetpack 5.1.2 and try this setup:
Orin Unable to Reach 10 Gbps Networking - #3 by DaneLLL

See if you can achieve target throughput on the custom board.

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Orin NX pci controller running at 8GT/s with a 16GT/s capable device

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