3.3 Volt, 144-pin, non-parity, 64-bit, 100 MHz SDRAM memory
Memory Devices 64MB of 100 MHz SDRAM memory is standard and can be expanded to a maximum of 320MB using IBM memory options. Only the ThinkPad 64-bit, 144 pin, 32MB, 64MB, 128MB or 256MB 100 MHz SDRAM DIMM 3.3V, non-parity memory options or equivalent can be used.
An internal slot is provided for additional memory modules. One memory module can be installed in the system for memory expansion.