lol.
well mate, Im not sure why the 90 degrees C your cpu will be under if thats the fan that died would make your fps so low, all I can say is your pc is lucky to be running at all without your cpu fan. I had a failure on here with my 2.8ghz system and it only just survived. Maybe thats why your framerate sucks. Get a fan. Get a coolermasters aero series, i love the turbine that comes with em!