Dell Optiplex GX280 SFF Motherboard Socket LGA775, with 2 – DDR2 DIMM slots supports up to 4 GB memory.
Motherboard for DELL Optiplex 280 Small Form Factor PC
Dell Optiplex GX280 SFF Motherboard Socket LGA775, with 2 - DDR2 DIMM slots supports up to 4 GB memory.