*******************************************WARNING***************************************
###################This is NOT a S 1681 or a X 1787.####################
&&&&&&&&&&&&&&& It is the Original Big Black 1540 ONLY. &&&&&&&&&&&&&&& 
This is a Good Tested and updated Motherboard.
 It has different REV Models. 
These are Always a bit Dusty as pictured. 
These Always have Lime build up on the bottom as pictured. 
I have a few sets of these. 
**************************************These are NOT Plug and Play******************************************************************
You HAVE to Put the drive board into your Drive.
You HAVE to do an offline update with latest firmware of OSU1 with a Thumb Drive to set this board to your Hard Drive. 
I have some Video showing how to do an offline update on my You Tube channel of same name.
I have a Video of this the 1540 tested and updated on my You Tube Channel of the same name.
I am here to help.
Ask any set up questions first.