To set a preferred graphics processor for Warhammer, using AMD Switchable Graphics Technology:
1. Ensure that you have the latest GPU drivers from either your Laptop’s manufacturer’s official website or AMD’s website.
2. Right-click on the desktop and select ‘Configure Switchable Graphics.’
3. Once the Catalyst Control Center has launched, look for ‘Warhammer.exe’ in the Recent Applications list. If it is not there, either launch Warhammer then return to the Switchable Graphics menu, or select ‘Browse,’ and navigate to your Warhammer Steam App folder (commonly “C:\Program Files (x86)\Steam\steamapps\common\Total War Warhammer”) and select Warhammer.exe.
4. To the right of Warhammer.exe in the Switchable Graphics menu there should be a button saying ‘Not Assigned.’ Left click on it to cycle through the options, which are ‘Power-Saving,’ and ‘High Performance.’
a. The Power-saving option makes use of the more Integrated GPU, and High Performance uses your higher performance AMD discrete GPU. Select whichever one you prefer.
5. Once you have selected your preference, click ‘Apply’ in the bottom right corner to confirm & apply.
Also please connect your AC power cable to your laptop.
NB. Some laptop computers will not run with the second more powerful discrete graphics card unless connected to the mains AC.