Total Micro 4GB DDR2 SDRAM Memory Module - For Notebook - 4 GB - DDR2-800/PC2-6400 DDR2 SDRAM - 800 MHz - Non-ECC - Unbuffered - 200-pin - SoDIMM Enables efficient and smooth execution of all your heavy-duty applications with maximum productivity Up to 800 MHz speed with unbuffered signal is enough to run heavy software smoothly while surfing web with dozens of tabs open 4 GB memory allows you to have more programs open at a time DDR2-800/PC2-6400 interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computer's performance 200-pin for enhanced, dependable system performance with maximum usability Notebook device support for your ram module for maximum productivity and convenience SoDIMM form factor with 200-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