New Build Freezes

[Swissivory]

Hello everyone

I`am using my new build since 2-3days now....everythings seems to be fine but today i thought ok let the pc run for a couple of hours and after around 3hours 20min i couldnt really use the pc anymore he would freeze every second didnt open programs anymore etc., basically i had to make a restart in order to use the pc again,
After restart everything works normal again. 
I had this issue already once there i reinstalled windows 10 and i hoped its fixed but appareantly its not and i have no idea what it is... my Asus Mainboard showed Code 40 but i am sadly not a pc expert i cant figure out the issue.
Would really appreciate some help.

EDIT: I checked Task Manager during theese Freezes and i had no real spikes in there not on cpu nor on the RAM.

PC Specs: 
Intel Core i7 7700K BOX (LGA 1151, 4.20GHz, Unlocked)
EVGA SuperNOVA P2 (750W)
ASUS MAXIMUS IX FORMULA (LGA 1151, Intel Z270, ATX)
Samsung 960 EVO (250GB, M.2 2280)
Microsoft Windows 10 Home (DE, 64-bit)
ASUS DRW-24D5MT
EVGA CLC 280
Corsair Obsidian 750D Airflow Edition (Big Tower)
Asus GeForce GTX 1080 Ti Strix 
Corsair Vengeance RGB (4x, 8GB, DDR4-3000, DIMM 288)

[ProjectBox153]

Is the machine having thermal issues?

[Swissivory]

i dont think so, when im not doing anything my Themps are around 30-33 and in prime95 i had max 82.
And my Side Panels are Stilll open since i have issues with the rig.

EDIT: After searching in google i found people saying disabling fast Boot would maybe fix it..... is it dangerous to turn that off?
 

[Swissivory]

I disabled Fast Boot for now and i believe the real issue is the EVGA Flow Control (AIO Fan/Pump Software) because as far as i can remember both times when i had the freezes i opened EVGA Flow Control like an hour ago before the freezes started so i just dont open flow control anymore and i hope its fixed.