Question CPU and GPU running at 100% when playing

[Jonneg]

Some time ago my pc began to run at 100% cpu when playing games. It first started when i booted up a game, but now it is all the time. When playing stuff like Dota2, apex and CS:GO. Found out recently that my GPU is also at 100% when playing apex atleast. I tried updating my firmware on my motherboard, freshly installed Windows 10 again. Nothing. Still the same problems.
I ran some benchmark tests, and it shows that everything is above average, so i guess something must be wrong with it.
I debated with my self if i should get a new CPU, thinking about the ryzen 5 3600 with the asus b450 am-4 motherboard. But i just wanted to make sure that my cpu is really the problem. Or if there is naything i could do to solve the problem first.

Thanks in advance.

Specs:
Operating System

Windows 10 Pro 64-bit
CPU

Intel Core i5 6600K @ 3.50GHz 34 °C

Skylake 14nm Technology
RAM

16.0GB Dual-Channel Unknown @ 1064MHz (16-18-18-36)
Motherboard

MSI B250 KRAIT GAMING (MS-7A68) (U3E1) 38 °C
Graphics

BenQ XL2411Z (1920x1080@144Hz)

HP ZR2440w (1920x1200@59Hz)

4095MB NVIDIA GeForce GTX 1050 Ti (ASUStek Computer Inc)

 

[rgd1101]

check cpu/gpu temp?
try with just 1 monitor?

 

[rgd1101]

check cpu/gpu temp?
try with just 1 monitor?

 

[Jonneg]

My temp is rising, but only because it runs at 100% all the time when playing. it is idle at around 35 celcius.
The problem startet around 2 months ago. Both components are around 2 years old

 

[rgd1101]

rising to what exactly?
clean the fan?

 

[Jonneg]

Only a little over 70 percent. But my CPU usage hits 100% well before that

 

[rgd1101]

Only a little over 70 percent. But my CPU usage hits 100% well before that

not the usage. the temp