HP D2971-63006 - ECC memory expansion board - Has 12 additional SIMM sockets - ECC Memory Board (with 12 SIMM Sockets) - Plugs into the Top of the System (Mother) Board (2 Can be Used) Retail
HP 12110-69004 - ECC memory controller board - With 1MB of ECC memory - ECC Memory Controller Bd - with 1MB of ECC Memory (12110B) Retail
