Modern computer performance is primarily affected by the processor and memory. These are the two things that will have the greatest affect on a computer’s general speed and memory. Knowing this leads to the question of which one item to prioritize, which depends entirely on what a person is trying to do with his or her computer. The type of operating system installed on the computer may impose hard limits on what area users can focus on in their computers. These computer components can easily be found through electronics retailers and their websites, computer websites and stores, and auction sites like eBay.