QNAP 4GB DDR3 ECC RAM Module - For Server - 4 GB (1 x 4GB) - DDR3-1600/PC3-12800 DDR3 SDRAM - 1600 MHz - OEM - ECC - Unregistered - 240-pin - DIMM Enables efficient and smooth execution of all your heavy-duty applications with maximum productivity No matter how heavy and numerous the applications that you are using, 1600 MHz memory speed will run them smoothly 4 GB memory smoothly executes complex apps and games 240-pin-pin 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 1 x 4GB modules for dependable storage efficiency and maximum convenience 240-pin for optimal performance and maximum reliability Server device support for your ram module to allow maximum efficiency and dependability DIMM form factor with 240-pin and 4 GB memory size for enhanced performance and speed to allow maximum usability Unregistered signal processing allows higher accuracy and enhanced ram module performance