Total Micro 4GB DDR3 SDRAM Memory Module - 4 GB - DDR3-1600/PC3-12800 DDR3 SDRAM - 1600 MHz Dual-rank Memory - CL11 - 1.35 V - Non-ECC - Unbuffered - 240-pin - DIMM - Lifetime Warranty RAM Module is the single answer to all your desired and heavy-duty application memory needs No matter how heavy and numerous the applications that you are using, 1600 MHz memory speed with unbuffered signal will run them smoothly 4 GB of memory to refine your computer's performance DDR3-1600/PC3-12800 interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computer's performance 240-pin for enhanced, dependable system performance with maximum usability CL11 CAS latency for faster, dependable clock cycles which allows quick access and retrieval of data and information DIMM form factor with 240-pin and 4 GB memory size effectively lessens the electrical load on the memory controller to allow maximum feasibility Unbuffered signal processing allows higher accuracy and enhanced ram module performance