bf4 is still full of bugs! that is probably why you get all these freezes nd lags.
my specs are the following
i7 920 oc 2.8
asus gene II
gtx560 oc to 950 coreclock, 2450 memory clock
I rn all bf4 maps on medium or high, on high sometimes i get a lag idk if its the card or the bugs in the game, but i still get 50+fps. on medium i get 60+ fps and usually no lag...
the game rocks but i hate dying behind cover, killing or gettingg killed by teammates because tags dont come up or come up to late, and what is most annoying is the crashes but to tell you the truth I dont get many.