Genuine Dell MotherBoard With Mounting Tray For Optiplex GX240 SFF/DT/SMT Systems, Compatible Dell Part Numbers: 3N338, 8P277, 7H371, 3E078, 5J706, 8P283 Form Factor Micro ATX. Chipset Intel 845. CPU: Supports Intel Pentium 4, Socket mPGA478. Memory: 168pin SDRAM ( 2 Slots), 1GB Max, PC133. Disk Drive Interface: IDE (ATA 33/66/100) x 2, Floppy Disc x 1. Expansion Slots AGP x 1 / PCI x 2. I/O Connectors: PS/2 Mouse, PS/2 Keyboard, Printer Port x 1, Serial Port x 2, Onboard Sound, USB x 2, Network LAN 10/100 x 1.