Dell OEM Optiplex 790 Ultra Small Form Factor USFF Motherboard NKW6Y Dell OEM Optiplex 790 Ultra Small Form Factor USFF Motherboard NKW6Y 0NKW6Y CN-0NKW6Y Manufacturer: Dell Part Number: NKW6Y Compatible Model: Dell OEM Optiplex 790, 990 USFF Condition: New