fps drop and lag in almost all games

Islam610

Commendable
Mar 2, 2016
9
0
1,510
i have lenovo y510p
cpu:4700mq
gpu:755m gt
ram:8gb
os:windows 10 pro
1TB Gaming SSHD SATA 8Gb
i play games on 60 fps but it drops to 53-51 at certain points and it lags (this never happened before )
i tried removing all apps -reinstalling windows --changing the drivers--reinstalling the games
but the problem still there
some games works very good like tomb raider 2013 and max payne 3 no fps drop or lag
 

Islam610

Commendable
Mar 2, 2016
9
0
1,510
i tested ram with memtest and it passed
tested hdd with Hard Disk Sentinel it was ok
tested cpu with ibt and it was stable
finaly i installed msi after burner to watch gpu usage while playing and it suddenly goes to 0 i don't know why
9CBXPaE.png

XyHopWD.png