Kernel power failure

[prieter]

Dear LTT fans, I am in need of some help. Whilst playing Runescape on their new NXT launcher, I am disturbed by some weard things. My pc randomly freezes and in my event tracker I get the message that the kernel power (ID = 41) stopped. However, my pc is still running. The lights on my keyboard also stopped changing. When I tried to press CAPS the light didn't go on. The red backlight of the keyboard stayed on. Here is a screenshot of my eventtracker. It is in dutch, although if you have questions understanding what it means I'll be happy to translate. My pc isn't overclocked and was stable for 6 months.

https://gyazo.com/478ae0afe9d52481a8d81fb8ab6a3010

specs:

Intel core i7 4790k
Asus gtx 970 strix
Fractal design 750w integra
gigabyte Z97x-gaming 3
Wd blue 1tb
samsung 850EVO
cooler master seidon v2 cpu cooler
8gb ddr3 1600 kingston hyperX

[prieter]

Here is a link for the details on the Kernel-power error.

https://gyazo.com/5294c5495ec3399b9db0cdd66bf72b51