A-TECH 2GB KIT (2 x 1GB) For Gateway 500 Series (DDR PC3200) 510 Series (DDR PC3200) 550GR. DIMM DDR NON-ECC PC3200 400MHz RAM Memory. Genuine Brand. 2GB KIT (2 x 1GB) DIMM DDR NON-ECC PC3200 400MHz 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)