4GB STICK Gateway SX Desktop SX2865-UR11P SX2865-UR15 SX2865-UR308 SX2865-UR328 SX2865-UR338 SX2865-UR348 SX2870-UR10P SX2855-UB22P SX2855-UR20P SX2855-UR21P DDR3 NON-ECC PC3-10600 1333MHz RAM Memory 4GB STICK DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gateway SX Series Desktop. (See Compatibility List Below)