Which games? Which msi 970 motherboard? There are several models, 970a-g43, 45, 46, 970 gaming.
There shouldn't be a compatibility problem with the cpu and gpu. You don't have to pair an amd cpu with amd gpu or anything. Try downloading amd's overdrive software and using it to monitor your cpu temps. It should give you a reading called a thermal margin in degrees, just keep in mind it's not the cpu temp it's the amount of degrees left until the cpu begins to throttle due to temps. If it's reading 10c it's 10c until throttling not running at 10c.
Once you have an idea of what the temps are you can see if you need a different cooler.