Alanthor :
Hi,
I can only play BF4 on 1920x1080 on high-mid graphic settings without any lag. Which of my components is the bottleneck?
AMD FX-4300 (OC'd to 4.4GHz)
Sapphire Radeon R9 270X 2gb oc edition (OC'd to 1120MHz core clock with 1.244VDDC
I see a lot of people pairing a moderately OC'd FX 6300 with the R9 270 and getting good frames on High with some Ultra in BF4.
Bumping your CPU from FX 4300 to FX 6300 with a good cooler like a Hyper 212 EVO will allow 4.4-4.5GHz and support the R9 270 well. It's going to run around $150 total for that upgrade.
Also worth noting, the FX 6300 works well on most budget motherboards with 4+1 power. But I wouldn't get too crazy with the OC on those. Do not try an FX 8 core on a 4+1 board.
Also, having low latency DDR3 1600 or 1866 RAM helps get the most out of these CPUs.