Weird I just tried High settings and it judders really bad......like not the graphics juddering, like a feedback loop error or something, between judders its high frame rates, ultra runs smooth as butter.......HELPFUL,lol
iv stopped getting crashes but then memory leak zaps my full 8gb and it becomes a slideshow until restart
Take the CPU back to stock like I said.
WTF! now at 1600 and its rock solid, harder than a quadratic equation.........gutted I paid for this ram to run at 1866 oddly enough.iv stopped getting crashes but then memory leak zaps my full 8gb and it becomes a slideshow until restart

What motherboard are you using?
Does the ram have an xmp profile? And 32gb at 1866mhz is a pretty hefty load on the cpu memory controller. Have you tried upping sa or io voltages, description of theese depends on the board. Tbh, for games 1600mhz is grand on ib or hw. Games dont show any noticeable benefit with high clocked ram. 8gb of 2400mhz ram here, pointless upgrade for a gaming system tbh.
and its been grand 80% of the time, but i just got used to adobe premier hanging and now bf4..............
ASRock z77 Extreme 4
Did you ever get any hard locks/freezes /BSOD?
Also, I've noticed it seems the game is loads more stable using Firefox as the battlelog browser instead of IE