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Amazon.com: OWC 4GB (2 x 2GB) PC5300 DDR2 667MHz SO-DIMMs Memory Compatible with MacBook, MacBook Pro, iMac, Mac Mini Core 2 Duo Models (OWC5300DDR2S4GP) : Everything Else
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Crucial 2GB Single DDR2 667MHz (PC2-5300) CL5 SODIMM 200-Pin Notebook Memory Module CT25664AC667 at Amazon.com
4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Apple iMac 7,1 (20-inch, 2.0GHz, MA876LL/A) Intel Core 2 Duo (Genuine A-Tech Brand) at Amazon.com
Crucial 4GB DDR2-667MHz (PC2-5300) CL5 ECC RDIMM DR 240-pin Server Memory CT51272AB667 at Amazon.com
Centon Electronics 4GB KIT DDR2 SODIMM PC2-5300 (667Mhz) APPLE Retail 4 DDR2 667 (PC2 5300) DDR2 667 4GBS/D2-667KIT at Amazon.com