Customer reported BIOS hung issue with SYS-740GP-TNRT (X12DPG-QT6). The symptoms are multiple (IERR, CATERR, configuration error, hang in BIOS). Multiple sets of CPU changed but still failed.
After extensive debugging, the issue is caused by Micron PCIe Gen 4 M.2 NVMe drive. Replaced this NVMe drive the issue resolved.