Whats wrong with my fps??? Someone please help!!!

[Edeien]

AMD cpu is not the best option for playing games we all know that, but playing the game with nvidia GT card is pathethic, the card is really bad and cheap not to mention it only has 25GB bandwidth making it even more pathethic, im sorry to say but your relatively new PC is suited for paperwork not to play up to date games like final fantasy 14 :/

now to help out :P
i dont know what kind of PSU you use but you should be fine with a proper 600W anyday, 750W for overkill but its not needed for a GT 630 card. to answer your other question. "can i upgrade to gtx630" -> no you cant assuming there is no gtx 630, the GT class ends with gt 640 and then the gtx starts. moving on, to run this game on max settings with the 65 inch screen you are definitely looking for a card with at least 3GB of video memory to handle such resolution. so you should be looking into cards like AMD hd 7950 and above or nvidia gtx 670 the 4GB versions of course and above but they are costy.
now if you want my honest advice on how to be safe and fit into budget HD 7970 is your best shoot for price/performance

ps: if you spent 1400 dolars on your pc, you got seriously ripped off, because that whole setup you have could easily fit under 400 dolars no joke, return the PC if you still can and build some ridiculous machine for your money.