EDIT: I should also note, I have had a Windows error pop up, telling me that I am out of memory and I should try restarting the program (Battlefield 4) to see if it fixes it. First time I've ever seen that error message.
I would say it's ram related. Either:
1) you have a lot running on your PC so 8GB isn't enough
2) 8GB might not be enough anyway but i doubt it
3) Have you deleted your page file? You will need a page file if you only have 8GB ram
4) I can't believe "only 8GB ram" needed to be said, but I guess games are getting more memory hungry and this will only increase with consoles having 8GB ram now.
I'd say option 1 or maybe option 3 are the culprits? With maybe a dab of option 2
