Unlike consoles, every PC uses a combination of unique parts which creates unique problems. To fix some of the more unique issues with hardware, Creative Assembly announced, on their official forums, that they will release a hardware update to fix a variety of issues.
The Total War: Rome 2 update will aim to "address known instances of crashes due to hardware conflicts alongside several other performance fixes."
For graphical issues or issues players found solutions for, Creative Assembly urges players to check the Total War forums for solutions the community found.
A list of official patches notes with release alongside the update this Friday.