HyperX 2GB, 1066MHz, DDR2, Non-ECC, CL5, 2 GB, DDR2, 1066 MHz, 240-pin DIMM HyperX 2GB, 1066MHz, DDR2, Non-ECC, CL5. Internal memory: 2 GB, Internal memory type: DDR2, Memory clock speed: 1066 MHz, Memory form factor: 240-pin DIMM, CAS latency: 5