Hi, last year I was given this PC http://www.ukgamingcomputers.co.uk/morpheus-i5-custom-gaming-pc-p-167.html by a friend for practically nothing as he no longer used it. It's performance was fine as I didn't really play many large games however since the last two months I started playing other games such as Black ops 3 and battlefield. I am not very concerned about the graphics of the pc, more the performance and was wondering which parts I should upgrade to boost fps. I'm not wanting to spend anything over £350 if it is possible, and would appreciate it if someone could tell me some of the components I should upgrade.