The system board contains three DIMM sockets labeled 1 through 3. Each socket can hold a single 72-bit DIMM module with 32MB, 64MB, 128MB, or 256MB of memory. When all three sockets are populated, the system board supports a maximum of 768 MB of memory with 256MB DIMMs. A DIMM will always be installed in the right socket. When you install additional DIMMs, you must start with the first empty socket to the left of DIMMs already installed. When you remove DIMMs, you must start with the first DIMM socket closest to the left edge of the system board.