BF4 is very CPU intensive, however if your 9550 is OCed and you add more DRAM (would go 8GB) you should be able to run the game at moderate to high settings
It will run on low settings and low resolution but you really need faster cou and ram to make the gtx 660 happy. If you upgrade the ram cpu and probably the motherboard you can play on high settings at 1080p
BF4 is very CPU intensive, however if your 9550 is OCed and you add more DRAM (would go 8GB) you should be able to run the game at moderate to high settings