Ok dudes rather than telling me it's not a cpu bottleneck what can I do to solve this other than what i already tried? Also that benchmark is not bf4 but bf3. BF4 can use more threads than BF3.
Think you might actually be right, a single R9 280x will barely do 60 FPS so two in Crossfire won't ever reach 120 FPS at 1920x1080 on Ultra settings nevermind the 2560x1440 that he wants to run the game at
and I'm not running ultra preset. I turn off post aa, ambient no SSAO 2xmsaa. I can do 120fps in most areas but like I said when I get fps drops I can see my gpu usage also drops to 60% and my cpu usage goes up to 99%.
one guy from guru3d said he upgraded for i5-2500k @ 4.8GHz to i7-3770k @ 4.4GHz and he got 30% increase performance.