4GB DDR3 ECC Registered Kit(PC3-8500, DDR3-1066MHz)- (4 x 16GB DIMMs) For Dell PowerEdge T320 and R320.

• ECC Registered DIMMs & ECC UDIMMs can not be mixed. If your system came with ECC UDIMMs then use of registered DIMMs will require removal of all existing UDIMMs.

• Operational memory speed is controlled by CPU type and number of DIMMs installed.