When V-Sync is inactive games are VERY laggy (depends on game). Nothing is loaded to 100% but fps can't ho higher 100 and stays around 40-80

[Watermelonie]

I have Alienware 2015 i7 4710HQ GTX980M and 16GB RAM DDR3.
Can anybody help me again, please?

 

[Oussebon]

What is the refresh rate of the monitor/screen you are using?

What do you mean laggy? What exactly is the issue?