Anybody know some tips as to how to run a game on max settings, especially on GTA V. When I run max settings, its only 15 FPS. Here the link to my computer (This is the exact model, no replacements, all factory standards) http://www.bestbuy.com/site/cyberpowerpc-gamer-ultra-desktop-amd-fx-series-16gb-memory-2tb-hard-drive-black-blue/4592900.p?id=1219775848732&skuId=4592900

Thanks!

Sorry to say, but there's no way you can run max settings for GTA V with that card and achieve 60FPS or even 30. It's possible that you can replace the card inside of the computer, though, but a card to run GTA V at max settings could cost you $250+ depending on the performance of the new cards being released soon. 

Any recommendations for a card?

It really depends on what you are willing to spend on a Graphics Card. If you are willing to pay a fair amount for a Higher-end Graphics Card then I'd suggest the new GTX1070 as it's only a slight bit more than a GTX970 and works far, far better, at least from what I read it does.