PC2-6400, DDR2-800, 800Mhz, Latency 5-5-5, Non-ECC, Unbuffered, 1.8V, 200pin SO-DIMM.
Contains one (1) 4GB DRAM memory module and is specifically designed and SPD configured for the MacBook 2.13Ghz Model.
This module is compatible with the latest Apple Firmware.