512MB to 2.5GB DRAM Upgrade (2GB+512MB) for Cisco 2901-2921
Cisco MEM-2900-512U2.5GB, 2 GB, 1 x 2 GB, DRAM
Cisco MEM-2900-512U2.5GB. Component for: PC/Server, Internal memory: 2 GB, Memory layout (modules x size): 1 x 2 GB, Internal memory type: DRAM