A-TECH 4GB KIT (4 x 1GB) For Gateway 500 Series 5310S. DIMM DDR NON-ECC PC2700 333MHz RAM Memory. Genuine Brand. 4GB KIT (4 x 1GB) DIMM DDR NON-ECC PC2700 333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gateway 500 Series. (See Compatibility List Below)