This is not the identifier for a known Intel Desktop Board. There are two possibilities here, (1) this is an custom board that Intel did for a specific OEM customer - in which case you must go through this OEM for BIOS and Driver updates, or (2) you are reading the order code off the box that the board came in, not the board id.
Intel had only two boards based upon the 975X chipset, the D975XBX and the D975XBX2. To see if you have one of these, look on the board itself for a sticker providing the name. Not seeing that, look for a sticker that provides both the board's serial number and the board revision (which will be of form [AA]XNNNNN-NNN, example AAG12345-100). In the latter case, I don't recommend that you include the serial number in your public response (keep it confidential).
Presuming that what you have is a D975XBX board, here is link to its BIOS and Drivers download page: https://downloadcenter.intel.com/product/22631/Intel-Desktop-Board-D975XBX Drivers & Software
Hope this helps,
...Scott
