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8GB (2X4GB) DDR2 800MHz PC2-6400 200-pin SODIMM Memory by NEMIX RAM at Amazon.com
OWC 4GB (2 x 2GB) PC5300 DDR2 667MHz SO-DIMMs Memory RAM Upgrade Compatible with MacBook, MacBook Pro, iMac, Mac Mini Core 2 Duo Models (OWC5300DDR2S4GP) at Amazon.com