For 5 monitors, that's going to require a GPU that can handle that. Usually, if it handles that many monitors, it isn't the best for big GPU processing like a game would require. For instance, this will handle 6 screens, but it's going to be lousy for gaming or anything that requires a lot of GPU processing.

https://www.amazon.com/VisionTek-Radeon-7750-GDDR5-MiniDP/dp/B00C7EPSVS/ref=asc\_df\_B00C7EPSVS/?tag=hyprod-20&linkCode=df0&hvadid=309773039951&hvpos=&hvnetw=g&hvrand=17401369306816103593&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9028320&hvtargid=pla-449332467319&psc=1