A-TECH 1GB STICK For Dell Vostro 200 220 Mini Tower 220s Slim Tower 320 400 420 Tower 410 A180 Tower. DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine Brand. 1GB STICK DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Vostro. (See Compatibility List Below)