Description: 12GB 1066 M Hz DDR3 ECC Kit with thermal sensors Mfgrs System P/ Ns: N/A Form Factor: Memory Module Pieces/ Unit: 3 (Three 4GB modules, totaling 12GB) Please note: networking components such as switches, routers, UPS & wireless devices require that speeds & standards be consistent throughout the network to gain optimum performance. To avoid compatibility clashes or for advice, please contact us on solutions@ebuyer.com.