The question is in the title. My factory RAM is a rinky-dinky 1 GB total. I thought it would be wiser, when upgrading, to remove that from it's place and plug it in later, after I have installed the 8GB + other 2GB RAM in other slots. However, many of the instructions on Youtube and from Apple say you should just leave the factory RAM where it is (Riser A slot 1+2) and then add on to it. What should I do?