I have an i5-7600k, and recently my CPU usages have been at 100% on task manager when playing most video games (ex. Fortnite or Modern Warfare). I was looking at related threads to see what the problem was and a few people said that it was due to my CPU only having 4 cores when the game relies on more. Ideally, I would like to just buy an i7-6700k and fix my problem but I'm not sure if it will work. Also, my motherboard only supports quad-core, so should I invest in an i7, or a new motherboard and a CPU with more cores? Any advice or help would be great! I'm also a little dumb with PC stuff so I don't know any better.
Specs:
GPU: GeForce GTX 1060 6 GB
CPU: i5-7600k
MotherB: Gigabyte GA-B250M-DS3H Micro ATX LGA1151
Specs:
GPU: GeForce GTX 1060 6 GB
CPU: i5-7600k
MotherB: Gigabyte GA-B250M-DS3H Micro ATX LGA1151