A-TECH 512MB KIT (2 x 256MB) For Dell Inspiron 1000 1100 1150 2650 4150 500m 5100 600m 8200 8500. SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory. Genuine Brand. 512MB KIT (2 x 256MB) 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)