We have purchased a few MCX4121A-ACAT adapters recently for using on Dell PowerEdge R620 and they work well except one severe issue.
The server fans start spinning at 20% once OS start and never stop after (screenshot included). Normally the fans work at 1% while system is on idle (screenshot included). The issue is persistent on any OS both in UEFI and BIOS boot modes and is more likely related to the firmware of the adapter itself.
We have tried setting BIOS settings conformed to settings from here https://community.mellanox.com/s/article/bios-performance-tuning-example-for-dell-poweredge-r730 but there is the same +20% fan spin increase at the OS boot and persistently after.
The firmware upgrade didn’t fix the issue.
The following is the output of mlxup tool that shows current firmware version and other information:
Querying Mellanox devices firmware …
Device Type: ConnectX4LX
Part Number: MCX4121A-ACA_Ax
Description: ConnectX-4 Lx EN network interface card; 25GbE dual-port SFP28; PCIe3.0 x8; ROHS R6
PCI Device Name: 0000:04:00.0
Base MAC: 0c42a14a1964
Versions: Current Available
FW 14.28.1300 14.28.1300
PXE 3.6.0101 3.6.0101
UEFI 14.21.0016 14.21.0016
Status: Up to date
I would like to know if there is any possible solution for this.