Unstable Fps With Good PC Specs HELPPPP!

[cairo1999]

Hello,
I have an I5 7500 4 gb of ram and a gtx 1050 before i used too get a stable 150 - 180 fps medium settings. Now for some reason all of a sudden i get an unstable 60 fps on lowest settings can someone please help! Also, my GPU doesn't have a PCI-E slot.

 

[norcalsc]

4gb of ram....?

 

[cairo1999]

4gb of ram....?

Yes do you think if i get more that will resolve it?