This problem recently started happening after playing bf4, during the middle of a game i would suddenly start getting insane fps loss and i couldn't alt-tab, ctrl-alt-dlt or perform any action really. I eventually got task manager to open to see that my ram usage was at 100%. I ended bf4 and my system was then idling with 70%-80% ram usage. I checked online and most people said it was a virus but i scanned with avast and malwarebytes to find nothing. I have 8gb of 1333MHz ram and im unsure what is wrong. Is it just bad ram at this point that i need to replace?