A-TECH 1GB KIT (2 x 512MB) For Dell Inspiron 1100 1150 4150 500m 5100 600m 8200 8500. SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory. Genuine Brand. 1GB KIT (2 x 512MB) SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Inspiron. (See Compatibility List Below)