This is 32GB (2x16GB) PC3-8500R 1066MHz DDR3 ECC Registered Memory Kit for a Supermicro X8DAL-i ServerThe system's memory specification: Six 240-pin DIMM sockets support up to 96 GB of Registered ECC or 24 GB Unbuffered ECC/Non-ECC DDR3 1333 MHz/1066 MHz/800 MHz Memory