The Cisco MEM8XX-512U768D 891/892 512 MB DRAM Upgrade to 768 MB Router Memory is a high-quality memory module designed for Cisco routers. It is a 512 MB DRAM upgrade that can increase the memory capacity of the router, providing better performance and efficiency. The module is in SO-DIMM form factor and is compatible with Cisco routers. Manufactured in Malaysia, this memory upgrade is a reliable and essential component for enhancing the networking capabilities of Cisco routers.