What you need to know about RAM, memory, CPU Processing and other important stuff that could tell you why your computer is slow.
Physical RAM/Memory
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RAM chips funcion quite literally like your Computer’s Memory. All the information that needs to be remembered when operating between different tasks (or even the same task) gets stored here. You know how people who have great memories can be awesome, that translates to the computer world as well, more memory = more awesome. So 8GB » 4GB » 2GB » 1GB » (this is 2011, don’t even consider anything less than 1GB).