Dell 43135631L01 D620 Latitude Laptop Motherboard - DIMM B DDR2 Only Slot - Attached Laptop Cooling Fan - 4 x USB Input - RJ45 x 1 Input - Serial Port DB9 Input - Modem Input - Dell Laptop PSU Input - Laptop Speakers Attached - 1.66/2M Processor Chip - With 0YD410 Heatsink