Hey sorry I'm kind of an idiot when it comes to computer stuff. I'm just starting to learn more about them. Anyway, someone told me that it is not possible to upgrade OEM computers, is that correct? I am looking to build my own gaming PC and someone said that if I plan on upgrading it down the line that I need to build my own. Can anyone provide some insight here? Also if I were to buy a custom build computer from say IBuyPower or Cyber Power, would those be "upgradable" down the road? Thanks for the help. Sorry I'm clueless lol.