I've recently started playing battlefield 3 multiplayer. I run it at 1920x1080 with all low settings with an Amd Athlon x2 250 @3.0 Ghz and an Nvidia GTX 650 1GB DDR5. I
noticed my framerate increased very little when i lowered the resolution to a very low resolution, I've also noticed that my GPU usage is about 50 % when I start experiencing lag and my CPU usage is at 100 %. My question is, if i where to upgrade my CPU(or overclocked it) would i start getting better frames and less lag?
CPU-AMD Athlon x2 250 @3.0 Ghz
GPU-EVGA GeForce GTX 650 1GB DDR5(Not Overclocked)
RAM-7GB DDR3 @1333Mhz
OS-Windows 7 Ultimate 64 bit
Depending on how much you can OC. But since its only a dual core, that is most likely your issue. Honestly an upgrade would help you out the most, if you stay with AMD a Phenom II x4 965 would be good for under $100, if you can find one.
A 3rd gen i3 or i5 would be a much bigger upgrade, but cost more. Do a little research here http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106.html