AddOn MEM3800-512U1024D-AO. Brand New Includes Lifetime Warranty.These are FACTORY ORIGINAL AVL APPROVED parts for Cisco (Micron, Samsung, Hynix, etc). AVL means these parts are manufactured buy those vendors approved to sell into the OEM (Approved Vendor List). All ACP modules are built to meet or exceed OEM specifications, and JEDEC standards. All memory modules come with a Lifetime warranty and are 100% guaranteed compatible for the appropriate systems it is intended for..