Arch Memory 2 GB (1 x 2 GB) 240-Pin DDR2 UDIMM for eMachines ET1831-07 RAM Arch Memory is a Registered Trademark of Arch Computer, LLC 2GB 240-Pin DDR2 800Mhz SDRAM 2 GB Memory for eMachines ET1831-07 By Arch Memory 2 GB Memory for eMachines ET1831-07 By Arch Memory Lifetime Replacement Warranty