60+ fps but still lag!?

[Oskar13]

I easily get 60FPS on all games on ultra, but always lock vsync, lately all my games started to lag/stutter for some reason but they still get 60+ fps easily at all times. What could be the reason? Could it be that my moinitor settings mucked up and its locked to 30hz?? (just a guess)
I also tried all of the games options like changing res, quality, turning off vsync, changing the buffering... etc etc.. but with no help
Thanks in advance

 

[DeathRabit]

For gaming you need at least 60hz .
Any way you check for any trojans and viruses on your PC ?

 

[Oskar13]

For gaming you need at least 60hz .
Any way you check for any trojans and viruses on your PC ?

I have literally just installed a new windows 8.1 just this morning, and the same thing happens. I have formatted the disks so no way i have virusses. Same thing happens in windows 8.1 as it did in windows 7.