Cisco 3925,SRE 900,WAAS Ent Large +SEC PAKbun REMANUFACTURED MEMGB= 2GB DRAM (1 DIMM) for Cisco W ISR, Spare MEMGB= 1GB DRAM (1 DIMM) for Cisco W ISR, Spare MEMMB= 512MB DRAM (1 DIMM) for Cisco W ISR, Spare MEMU2.5GB 512MB to 2.5GB DRAM Upgrade (2GB+512MB) for Cisco 1941 ISR MEMU1.5GB 512MB to 1.5GB DRAM Upgrade (1GB+512MB) for Cisco 1941 ISR MEMU1GB 512MB to 1GB DRAM Upgrade (512MB+512MB) for Cisco 1941 ISR MEMMB-DEF 512MB Default DRAM for Cisco 1941 ISR