Games started to lag (was not laging few days ago, new PC)

FLoKI

Commendable
Mar 20, 2016
2
0
1,510
hello, my pc started laging for no reason (all drivers updated) pc is new (build on 2016-02-25). Spec: i56600k, 8gb/ddr4/2666/geforce 960/4gb/250ssd/1tb hdd.
So Im only playing bf4 on high and it was going on 75 fps (cuz my monitor refresh rate is 75 and i locked fps) and now i get around 40 even on lowest settings :(, what can be wrong here or what problems occurred ?