Also, dmidecode is very handy.

  # dmidecode 3.4
  Getting SMBIOS data from sysfs.
  SMBIOS 2.7 present.

  Handle 0x0002, DMI type 2, 15 bytes
  Base Board Information
          Manufacturer: Dell Inc.
          Product Name: 02##K5
          Version: A01
          Serial Number: /BGK####/CN#######/
          Asset Tag: Not Specified
          Features:
                  Board is a hosting board
                  Board is replaceable
          Location In Chassis: Not Specified
          Chassis Handle: 0x0003
          Type: Motherboard
          Contained Object Handles: 0