General Discussions

[amolpandit]

I have a X570 Taichi Razer Edition. I have a Ryzen 7 5700x3D, 3080ti along with a WD SN850X 1tb on M2_1 slot ie. Closest to the CPU and a WD SN580 2tb on M2_2 slot. The M2_1 slot I believe uses PCI-E lanes from CPU and M2_2 slot uses PCI-E lanes from chipset. But inspite of what the manual claims the M2_1 slot is running my SSD @ Gen4 x2 lanes instead of x4. I contacted ASRock but all I got is reseat the CPU. Which I did but nothing changed. Now I don't know what to do. So trying my luck on AMD forum. 

[johnnyenglish]

I  can't say I've read carefully the manual but M.2 slot 1 and 2 come from CPU so you are sharing lanes. Try it on slot 3 or 4 maybe.

Good luck 

[amolpandit]

I have a WD Blue SN580 On the M2_2 slot which runs at Gen4 x4. So that's fine. I just updated BIOS to latest version but that didn't fix the issue. Managed to get a Ryzen 5 3600 which has PCI-E Gen4 support, will try to put that in the system and try. If not then board is the issue. This has been driving me crazy. 

[elstaci]

According to ASRock specs on your Motherboard your Ryzen 7 5700x3d (VEMEER) should both run at Gen4x4 in M.2 slots 1 & 2:https://www.asrock.com/mb/AMD/X570%20Taichi%20Razer%20Edition/Specification.asp#Specification

According to Monkey-CPU processor site the 5700x3D is a Vemeer Gen 3 processor with PCIe bandwidth as follows: https://www.cpu-monkey.com/en/cpu-amd_ryzen_7_5700x3d

NOTE: All of AMD 5000 series has the same PCIe Bandwidth limitation of 39.4Gb/s which is less then GEN 4x4 Bandwidth of 64gb/s.

NOTE: Found out my Matisse Ryzen 7 3700x has the same maximum PCIe bandwidth as the Vermeer Ryzen 7 5700x3D.

[FunkZ]

You've run out of available lanes.

As @elstaci points out the CPU has 20x usable PCIe 4.0 lanes and both the M2_1 and M2_2 sockets use CPU lanes. Assuming you've got a graphics card taking 16x you're out of lanes.

As @johnnyenglish suggests, move the M2_2 drive to a socket run off the chipset.

[amolpandit]

I got a reply from ASRock where they tested the same config. And it runs Gen 4x4.

Secondly

Ryzenz have 24 Native PCIE lanes. But only 20 are available since 4 are for chipset downlink. 16 for GPU and 4 for the storage. So it should not run out of PCI-E lanes. I will try to troubleshoot this, but worst case I will RMA the board and ask for live demo at service center before accepting replacement.