Cpu 100% usage when booting up games

[Titaniumkillz]

So, I have a I7 7700k with an Rtx 2070 Super and 32GB of ram. and ever since i placed my pc into my new case (this is also when i installed my GPU) my cpu usage likes to spike while starting certain games, but is just fine after i've booted into the game. While moving my system into a new case i never took the cpu out and treated it carefully, soo im guessing its not a bend pin. I don't have anything overclocked (i do however have my ram slightly underclocked due to my motherboard not supporting higher, planning on fixing that when i want to buy a new cpu.) So does anyone have an idea what might be causing this? because i can't figure it out. (sorry if my english was incorrect in some places)

[Guest]

When a game is booting up the CPU is loading data from the hard drive into ram. This stresses the CPU.

[Deuxez]

Its normal for it to go to 100% when launching games. My 1600af goes to 100% when im booting up minecraft and other games. It basically sends a bunch of data to and from the HDD/SSD. As @Medicate said above.

[Titaniumkillz]

ok, but is it normal it basically freezes during a 1-3 minute period?

[Mick Naughty]

My rigs do that. Even joining an actual lobby with my 4770k will freeze up.  
Could a 64 core cpu and see if it doesn’t do it. 

[barkydoggo]

Check the drive connections. Could be a bad SATA connection and it's irritating the controller, and on high I/O requests the CPU freaks out and locks. Otherwise, I wouldn't worry TOO much, I'd just go remove some startup items in Windows and run a small set of open programs when gaming. It'll probably make a difference.