I would like your opinion on the following setup that i have now. I want to know if i will be able to play battlefield 4 on medium-high settings and especially 64 players multiplayer with this CPU.
CPU: AMD Phenom II 720 BE - overclocked to 3.4Ghz by increasing multiplier to 17
Motherboard: Asus M4A78T-E
RAM: Corsair 4GB - Dual channel DDR3-1333
HDD: Seagate 1TB 7200 rpm
PSU: PC Power & Cooling 420W
GPU: AMD HD 4670 - planning to upgrade soon to AMD 7850
Case: Antec One
CPU Cooler: Coolermaster Hyper TX3 EVO
Will my CPU be a serious bottleneck to AMD 7850? I thought to upgrade the CPU to FX-6300 but unfortunately my motherboard does not support it.
There will definitely be a bottleneck. However, I think you will be able to reach playable FPS on modest settings but will experience lag spikes. I would recommend an octa core FX CPU or an i5. Anything lower than that, wouldn't be very powerful for multiplayer gaming.
There will indeed be a bottleneck, but you can look around for a replacement cpu rather than replacing the motherboard too. The 965 BE wont bottleneck any card until the 7970, and it is an AM3 socket type. I picked mine up for 80 bucks 5 months ago, so it is a cheap solution to an expensive problem. The next step above that would be the FX 6300, then the FX 8350. Those are the 3 choices, just a new cpu, which will do what you need it to, or new motherboard with one of the 2 processors.
I think i may buy a 965BE so as to avoid buying a new motherboard. With 720BE and my current GPU i managed to play CoD Black Ops II single player with playable frame rates. Of course BF3 and BF4 multiplayer need a good CPU. AMD 965 BE were discontinued. Aren't they? Do you know where can i buy online this CPU, used or new. Because it seems that it's difficult to find one now. By the way, do you think that an intel i3 haswell is a bad idea?