4GB DDR2 667MHz SODIMMs for Macs

Specifications: PC2-5300, DDR2-667, 667Mhz, Latency 5-5-5, Non-ECC, Unbuffered, 1.8V, 200pin SO-DIMM. Contains one (1) 4GB SO-DIMM memory module that is designed specifically for use with your Mac. This module is compatible with the latest Apple Firmware. Installation Guide for a MacBook Pro RAM Upgrade Learn how easy it is to install Ramjet memory into your 17-inch MacBook Pro by viewing our installation video below. Learn how easy it is to install Ramjet memory into your 15-inch MacBook Pro by viewing our installation video below. You can also view Apple's installation guide for more information.