My son reports problems with the newest games: B'field 3, et al. Dropped frames, poor response time. He has an AMD system: AsRock N-68 mainboard, 4GB RAM, AMD Phenom II X2 3.0 Ghz CPU. He has a pretty good graphics card: nVidia GTX 560.
Short of buying a new barebones system, is there any way what he has can be upgraded? The games specs list a "quad core" CPU as being ideal. Can one be purchased for his current setup? Will it be problematic to install?
There are three things that I would recommend that you upgrade in this situation. First priority: Mother board, mainly because that will allow you to upgrade the other 2. #2: CPU. Get something newer, or maybe switch to intel. and #3: RAM. The memory is actually very important with games such as Battlefield. What is your budget? Because with out a budget range, I'm useless to you..