Asus RS704DA-E6/PS4 - Manual (Page 65)

ASUS KGN(M)H-D16 4-15
5. LPC debug card connector (14-1 pin LPC1)
This is a low pin count interface used to plug in the LPC debug card.
6. Serial General Purpose Input/Output connector (8-1 pin SGPIO1,
SGPIO2)
This connector connects to the SGPIO connector on the SATA HDD
backplane.