Kingston Value Ram 2gb 667mhz Ddr2 Ecc Cl5 (kvr667d2e5/2g) - at Amazon.com
Amazon.com: High Performance Memory Module for RAM for Intel/AMD (2GB, DDR2,800MHz, 200PIN, PC-6400), Compatible with Your Digital Smart Computer/Computer : Electronics
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2GB 2 X 1GB PC2-5300 667MHz 240 pin DDR2 SDRAM ECC DIMM Desktop Server Memory for Dell PowerEdge SC440 (PARTS-QUICK BRAND) at Amazon.com
Komputerbay 4GB (2x 2GB) DDR2 PC2-5300F 667MHz CL5 ECC Fully Buffered 2Rx4 FB-DIMM (240 PIN) w/Heatspreaders for Apple computers at Amazon.com