My GTA 5 is lagging

Sam

Bronze I
Dec 31, 2016
2
1,510
20
I don't why my GTA 5 is lagging at lowest settings in window borderless mode.. Is there any way to fix the lagging issues? I opened up my computer case and cleaned it today. This is my specs http://imgur.com/a/XhLIz and also I have a 400W PSU.