Standard Memory: 512MB via (2) 256MB SO-DIMMs (removable) Maximum Memory: 2GB Memory Slots: 2 The MacBook uses one of the fastest memory technologies available today—667 MHz, double data rate (DDR2), synchronous dynamic random-access memory (SDRAM). It ensures high performance and reliability by synchronizing memory speed with the speed of the central processor so that data can be delivered continuously and more rapidly to the processor. And if both slots are loaded with an equal amount of RAM — which is strongly recommended — you can take advantage of the system's dual-channel memory architecture for an additional performance boost. With a dual-channel memory interface, both banks of SDRAM can be addressed at the same time, enabling the MacBook to reach a memory throughput of up to 10.7 GBps. FREE with every module - MCE mini screwdriver and anti-static wrist strap to help ensure safe and proper installation of your memory upgrade!

4GB Memory Upgrade Kit for MacBook and MacBook Pro Item No.:4GBKITMACBOOK Price:$99.00	2GB Memory Upgrade Kit for MacBook Item No.:2GBKITMACBOOK Price:$54.99
1GB Memory Module for MacBook, MacBook Pro, Mac mini (Intel) or iMac (Intel) Item No.:1GBSODDR2PC5300 Price:$34.99	512MB Memory Module for MacBook, MacBook Pro, Mac mini (Intel) or iMac (Intel) Item No.:512SODDR2PC5300 Price:$31.99