New Genuine OEM DELL Optiplex 755 Motherboard SMT Desktop Mini Small Tower Y255C Intel GM819 JR271 Logic Main System Board Assembly Intel Celeron Core 2 Duo Genuine Original OEM DELL Part Motherboard For Dell Optiplex 755 Small / Mini Tower (SMT) Intel Socket 775 CPU: Pentium, Celeron, Core 2 Duo, Core 2 Quad Part numbers: Y255C GM819 JR271