So, I have a HP Compaq Elite 8300 SFF and took apart my computer to measure stuff because I am trying to find a GPU to work with the case. When I put it all back together all the sudden my 8 GB of ram says that only 3.39 GB of that is usable!?! It also changed my 64-bit computer into a 32-bit!?! I have no idea what is going on as it also loaded a backup of my computer from a year or something ago! So I fully restarted my computer to see if that would fix it and nothing fixes it all I have open is Firefox Nightly and Settings. If you need to know more just message me.