HyperX 3GB DDR3 Memory Kit, 3 GB, 3 x 1 GB, DDR3, 1866 MHz, 240-pin DIMM HyperX 3GB DDR3 Memory Kit. Internal memory: 3 GB, Memory layout (modules x size): 3 x 1 GB, Internal memory type: DDR3, Memory clock speed: 1866 MHz, Memory form factor: 240-pin DIMM, CAS latency: 9