Question USB capped to 40MB/s. Out of PCIe lanes on x570?

[TheDigitalShaman]

Hi everyone!
I hope you are well.

I am looking for clues to begin a deeper investigation as to why all my USB ports are capped at 40MB/s.

My gear is:
Ryzen 9 5900X
Gigabyte X570 Aorus Master

My suspect is PCIe lanes. I am pretty short on those. Calculating how they're utilized was quite a game when putting all the parts together.

I have NVM in every M.2 slot.
I also have an ASUS Hyper m.2 expansion card in the top PCIe x16 port with bifurcation 4x4 and another two NVM drives in it, making it a total of 5 NVM.
In the 2nd PCIe x16 slot is a video card (can't be in the top one as then can't access the 2nd x16 PCIe due to card thickness and the expansion m.2 card doesn't work from the bottom 3rd one, which is empty and covered by video card).
I also have connected 4 SATA. Two SATA use CPU lanes and the other two SATA use chipset. The 5th and 6th sata are not in use, because the far bottom m.2 nvm drive.

Not only USB doesn't work as expected, but the 2nd LAN from the motherboard also doesn't work (at all).

What do you think?

 

[Eximo]

I think you need a NAS or even a server with an U.2/M.2 backplane and real drive controller cards to handle all of that. And some extremely fast networking if you want to benefit from NVMe throughput.

Something is confusing me. If you have a 4x4 bifurcation setup for the primary slot, the second slot should have zero lanes. Your third x16 slot should be PCIe 3.0 8x if I am reading this correctly. So I don't understand how your GPU is operational in the second slot.

As for all the other potential conflicts, yes, usually using some SATA and M.2 will conflict with each other and x16 slots and 1x slots from time to time. That could easily explain your lack of USB bandwidth and inoperable network card.

Might also be worth looking at an X670E board for a platform upgrade to get more capability. Or you need to consolidate your NVMe storage into larger drives.

 

[Lutfij]

To add, I think your second NIC is disabled in your BIOS, either that or it was taken out by a power surge(lightning strike). Does it show up in your BIOS? Also, yes, you seem to have overcomplicated what is usually a straightforward approach with PC hardware.

See if this block diagram makes sense to you;

^ source.