Arch Memory 4 GB (1 x 4 GB) 204-Pin DDR3 So-dimm for Acer Aspire 4339 AS4339-2618 RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 4GB 204-Pin DDR31066Mhz SODIMM 4 GB Memory for Acer Aspire 4339 AS4339-2618 by Arch Memory Lifetime Replacement Warranty