fps issues x5 accounts

[Shania]

AH thank you both of you, yes seems its the graphics card.
I can upgrade it, in a few weeks, what would you suggest, for my system specs linked above ?
Probably around $300-$450 mark, AU $ though.

Someone suggested the 4G GTX 770

Cannot look at doing much upgrades to my PC Until Middle of Next year, when pc if still works, lol, is handed down to one of the kids.

But If I can get away with adding in a better graphics card too improve my FPS at around $450 max, then I can afford to do that.