512MB to 1GB DRAM Upgrade (1 1GB DIMM) for Cisco 2951 ISR
Cisco MEM-2951-512U1GB, 1 GB, 1 x 1 GB, DRAM
Cisco MEM-2951-512U1GB. Component for: PC/server, Internal memory: 1 GB, Memory layout (modules x size): 1 x 1 GB, Internal memory type: DRAM