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 one (1) 2GB module, and is specifically designed and SPD configured for the MacBook 2.13Ghz.
This module is compatible with the latest Apple Firmware.