I have a desktop system with AMD FX 4300, graphics card: Sapphire HD6450 2GB DDR3, Motherboard: MSI FM2-A85XA-G65, RAM: 8GB 1333 Bus DDR3, Harddrive 1TB, PSU: Tharmaltake 450W. It runs battlefield 3 in good speed. But I was wondering, is it enough to run Battlefield 4 in good fps ? Or I need to upgrade something ?