2GB KIT (2 x 1GB) For EMachines W Desktop Series W3507A (DDR2) W3621 W3622 W3629 W3644 W3650 W3653 W5233 W5243. DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory. Genuine A-Tech Brand. 2GB KIT (2 x 1GB) DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For EMachines W Desktop Series. (See Compatibility List Below)