A-TECH 2GB KIT (2x 1GB) Gateway FX Series Desktop FX540 Series FX540B FX540 Series FX540S FX540 Series FX540XG FX7020 FX7024 FX7026 FX7029E DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine Brand 2GB KIT (2 x 1GB) DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gateway FX Series Desktop. (See Compatibility List Below)