Hello, I own a mid-2010 iMac and am planning to upgrade from 4GB to 8GB. I know I can EASILY youtube how to do it myself to keep it cheap, but my main questions are that I don't know where (Newegg i guess) and what brand to buy the RAM from. Is ram a blanket piece of equipment that most computers use the same size for to easily slot it in and if so, for the iMac where and what brand should i get? I'm new to tinkering with my own computer. Thanks so much for any help.