Genuine Dell FT231 XW055 UM941 Front I/O Board With Power Cables For Optiplex 755 760 780 Small Form Factor SFF Systems Compatible Part Numbers: XW055, P9847, UM941, P8409, FT231 Genuine Dell Front I/O Board For Optiplex 755, 760, 780 SFF Systems 2 x Audio Input/Output, 2 x USB Compatible with Optiplex 755, 760, 780 Small Form Factor (SFF) Systems Compatible Board Part Number: XW055, UF888 Bracket Part Number: P8409, 2-Pin Cable Connector: FT231 Large Ribbon Cable Part Number: UM941, Small Ribbon Cable Part Number: P9847