I just recently installed Fedora 23 on a machine. It was running very slowly, and initially only had 1GB of RAM. So I installed 4 more GBs. Still very slow. I thought that perhaps it was a problem with Fedora 23 so I wiped everything and installed Fedora 22. However it is still very slow.
A terminal will usually open just fine, however as soon as I open Firefox (or Chrome) it will freeze for about ten minutes at a time. It will also do some odd looking stuff while trying to render simple things like the browser. (See attached screenshot) The most appropriate term for it would probably be "lag".
I'm stumped. What could be causing this? And how do I fix it?