Bought and installed Call of Duty Ghosts and Battlefield 4 and running them on lowest settings, battlefield atleast still looks impressive, but CoD, on these settings, looks like something Id have played 10 years ago.

I know my gfx isnt really strong enough (even though its less than a year and a half old...) but is there anything else that i need to be concerned about?
befor i go replace some random part, hoping that it magically improves performance.

Currently running:
gfx: Nvidia geforce 550ti
cpu: AMD A10-5800K 3.8GHZ Quad Core
Motherboard: MSI AMD A85XA-G65 Socket FM2
psu: Gigabyte Powerrock AX 600W
ram: 8gb ddr3 1333
HDD1: Western Digital 640GB SATA 3Gb/s 64 MB Cache
HDD2: Western Digital 1TB SATA 6Gb/s 64 MB Cache

So like, suggestions for new parts and reasons and stuff.
was thinking about getting an AMD 7850
http://www.takealot.com/computers/co...d-2gb,12802561

the stats totally trump my current card
http://www.hwcompare.com/12048/gefor...adeon-hd-7850/

Would it be worth it? would i see the desired improvements with just upgrading my card?