AddOn - Memory Upgrades 1GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Laptop Memory Model MB320G/A-AA Cas Latency: 5 Voltage: 1.8V Buffered/Registered: Unbuffered Features: This Apple Computer MB320G/A compatible 1GB DDR2-667MHz Dual Rank Unbuffered 1.8V 200-pin CL5 SODIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by federal law to not affect or void OEM warranties. Compatibility: Apple Desktops: iMac 2.0GHz Intel Core 2 Duo 20 (MA876LL) iMac 2.4GHz Intel Core 2 Duo 20 (MA877LL) iMac 2.4GHz Intel Core 2 Duo 24 (MA878LL)