In many cases, modern PCs use two graphics cards, an integrated and a more powerful dedicated one.
By default, you switch to the dedicated card automatically when you have a demanding application running, such as graphics-intensive games.
This function does not always work properly, so the game may start on an integrated graphics card leading to slow and stuttering movements of the characters, lagging, low frame rate, and even graphic distortions or a black screen.
To solve this issue, we highly recommend you to create a special rule for game launch using your graphics card manufacturer’s software.
You can find more information here: http://www.gunsofboom.com/en/faq_cards/
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