Quote from Pamperstry the obliteration game mode that just got added, super fun!
And DICE just added a 20 minute time limit to that mode. Probably because there's a bug that causes the bomb to spawn below ground after the tower has collapsed, so nobody can get to it and it becomes a stalemate. I joined a game to find it had been running for 2 hours because of that bug.
Also, if you have low framerates no matter what, DirectX problems, or just want high perfomance with low quality, make a "user.cfg" file in the same folder as BF4.exe , and copypasta this: http://pastebin.com/B4H3QJ0L