CPU speed and memory are the two most important components determining the performance of a computer system. Since the CPU speed of high end systems(those that use RDRAM) from a few years ago is still more than sufficient in running most of today's applications, memory becomes the key to optimum system performance. Memory is the least expensive way to dramatically improve your computer's performance and it is as easy to install as changing the batteries of a flashlight. The amount of RAM you install in your PC not only determines the number of programs you can run simultaneously, it also affects how efficiently each program performs. When your system runs out of memory it uses your hard drive. Hard drives have become faster but they are still only a very tiny fraction (1/10000) of the speed of memory. That's why your computer stalls when starting and switching screens and programs. Therefore, you should never allow your PC to run out of memory. Treat yourself to this cost-effective boost today.