This message was posted on behalf of Intel Corporation
You could see the revision on the board itself? Additionally, if you provide us with the PBA number that is imprinted on the board, we would be able to find that information for you.
Information about the Motherboard revision is displayed on the BIOS, under System Information Tab on current Motherboards.
You could get more relevant information about Motherboard Part Number, Stocking ID, or Serial Number from http://www.intel.com/content/www/us/en/support/boards-and-kits/000005625.html
Current BIOS revision is 2.17 and BMC revision is 1.18, the Firmware update package for DOS - S5500HV is available for download at https://downloadcenter.intel.com/download/19154/Firmware-update-package-for-DOS-S5500HV?wapkw=sr1670hv
Please let me know if you have any questions.