From EU portal.

You’ve downloaded Update 1.0 and it’s time to start playing, but performance issues stop you from enjoying the game? We’re here to help you out. No matter your setup, here are some general tips on how to get your system up and running again.

Get the latest drivers for your graphics card

Both Nvidia, AMD, and Intel regularly update drivers for their respective cards. The latest drivers will usually improve performance, especially for the newest games. Head to their websites to find the latest version. Make sure to match the drivers to your operating system and your specific model of graphics card. If you’re not sure which card you have, both sites offer an automatic detection tool to get you the right package.

Check the guide to updating video card driver to ensure correct installation:

•  HOW TO UPDATE THE VIDEO CARD DRIVER