Crucial 4GB 240-Pin DDR3 SDRAM DDR3L 1600 (PC3L 12800) High Density Desktop Memory Model CT51264BD160BJ Cas Latency: 11 Voltage: 1.35V/1.5V Buffered/Registered: Unbuffered Features: CT51264BD160BJ is a single 4GB DDR3L Desktop module that operates at speeds up to 1600 MT/s and has a CL11 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non-ECC. It conforms to the industry standard UDIMM layout of 240 pins and is compatible with computers that take DDR3L UDIMM memory.