512MB to 1GB DRAM Upgrade (512MB+512MB) for Cisco 2901-2921
Cisco MEM-2900-512U1GB, 0.5 GB, 1 x 0.5 GB, DRAM
Cisco MEM-2900-512U1GB. Component for: PC/server, Internal memory: 0.5 GB, Memory layout (modules x size): 1 x 0.5 GB, Internal memory type: DRAM