Dell Optiplex 3040MT Series Intel Socket LGA1151 Desktop Motherboard HKCW0 0HKCW0 CN-0HKCW0.Dell Part Number: HKCW0 0HKCW0 CN-0HKCW0Compatible Part Numbers: MIH11OR Whitefish 14056-2 GG2R7Compatible Models: Dell Optiplex 3040MT Series