Being able to run BF3 and being able to run BF4 are 2 different things. They are built on different engines. The 650 is a weak card for BF4. Also the 6300 is a decent 6 core but not the greatest for something like BF4. If switching servers doesnt fix your stuttering. I stutter sometimes, but I switch servers and I play fine. If finding a server you dont stutter on doesnt work, upgrade your hardware.
thanks, ill try differnet servers, atm i dont have the money to upgrade