1. update them drivers bro
Look around the updates, Your graphics card driver update might just be there.
If your PC does not notify you when Driver updates are available then you will have to go to the drivers specific website and download the driver update from there. First, find out which graphics card you have, and also check which version of Windows your PC is running. Head to Device Manager in the Control Panel and click on Display adapters. You'll see the name of your graphics card.
2. optimize game settings
3. OVERCLOCK! OVERCLOCK! OVERCLOCK!
Overclocking the Graphics cards is the best option for gaming; a good graphics card has a major impact on games. You may find an option to overclock the GPU in the driver itself (launch the interface from the relevant icon in Windows' Notification area). Alternatively, you might need to track down third-party software.
Overclocking the CPU or RAM is much simpler, they are many software's available that help overclock the CPU, its best that you research on what is best for your PC. Some computers allow CPU and RAM overclocking via BIOS. Simply reboot, press Delete (or whichever key takes you to the BIOS) and look for the performance settings.
4. Game boosters
5. look around your graphics card settings
Then poke around here and there to make sure Your Card is set for best performance
Hint* If your Using Intel Graphics, head to 3D settings and make sure the bar is set from "Quality" to "Performance".