Hello M.Adil,   Thank you for that information. It is showing us: NIC in Slot 1 Port 1 Partition 1 - PCI Device If you expand that you can see the NIC details.   I would recommend check that system firmware (iDRAC, BIOS) and PCIE NIC card are up to date on firmware: Drivers an downloads and firmware: [URL]   Next Reseat the NIC in slot 1. If it still gives error then try the NIC in Slot 2 and check results. See if the issue follows the NIC.   Run the built in hardware diagnostics and check results: Boot to  F11 on Dell Splash screen, selecting  Boot Manager -> System Utilities -> Launch Dell Diagnostics.  Note any messages and continue testing.  
Tue Jan 24 2023 23:22:38 An OEM diagnostic event occurred.Tue Jan 24 2023 23:22:38 A fatal error was detected on a component at bus 128 device 3 function 0.Tue Jan 24 2023 23:22:38 A bus fatal error was detected on a component at slot 1. The server restarted twice a week with the same error.  Can anyone guide me to identify and resolution of this issue?
PowerEdge R630 Restarted