Random shutdown followed by infinite boot loop

Therii

Commendable
Sep 2, 2016
5
0
1,510
Specs: (just gonna link it all)
-Intel Core i7 6700K 8MB 4 GHz
-Corsair Hydro Series H100i v2
-ASUS GeForce GTX 1080 ROG Strix Gaming
-Corsair AX 860i, 860W PSU
-Crucial MX300 750GB 2.5" SSD
-WD Desktop Blue 3TB 3.5"
-ASUS ROG Maximus VIII Formula, S-1151ATX, Z170, DDR4, 3xPCIe-x16, SLI/CFX, M.2, SupremeFX, WiFi(ac)
-Microsoft Windows 10 Home
-Corsair Vengeance LPX DDR4 2666MHz 16GB x 2

Okay, so I've had this problem 1 month after I build my PC and I have been at it, testing anything that could be the problem to be expertice. Mind you I am not a seasoned pro with hardware and I know maybe alittle more than the avrage person knows about it.

The problem:

After a month of having fun on my newly build system, the PC shutdown out of nowhere. It would then proceed to restart in a infinite loop (power on for 1 second then nothing for the next 3-4 seconds. repeat) until I would shut off power to the PSU. While it starts up I get the Q-Code 25. The only way to make it boot again is to remove and reseat the cables from the PSU. I would test the PC alot over the next weeks and months and after each attemp the PC would last all from 10 minutes to hours without problems, untill the random shutdown. I've seen countless videos and read forums with similar problems without anything that is exactly the same problem with a good result or explaination.

What I've tried (in order of progress):

-Rebuilding the PC because I thought there might be a short circuit with a standoff or somthing. Nothing!
-Testing motherboard, CPU and PSU to see if I can get up bios.
-Testing Mobo, CPU, PSU and 1 brick of RAM.
-Tried all of the RAM. 1 by 1.
-Ran MemTest86.
-Changing PCI slot for my GPU.
-Checking temps on all components.
-Rebuild the computer, 2nd time. Checking everything is snug and perfect.
-Changing all the cables with new ones.
-Send in a RMA for my PSU, wicth was tested OK with a stress test that lasted 60+ hours running PassMark, BurnInTest og Heaven benchmark.
-Rebuild the computer again for the 3rd time. ran alot of different stress tests. This time there is no shutdown for 2 months, untill today.

I am honestly at the point of just giving up, I would really hate to send the whole PC in to some tech shop. That's a last resort! So I ask if anyone have had the same problem or can see anything I don't see here?

Is there a problem with my RAM and my mobo since they are optimized for x99 and 100 series? Can it still be the PSU? I've read that Cosair is being worse and worse and there are people reporting problems with the AX PSU series. I need help -_-
 

Therii

Commendable
Sep 2, 2016
5
0
1,510
Update: After speaking with tech support we might have found the possbile reason why the random shutdowns. It turns out that the motherboard did not support the ram I have running in 4 DIMMs.

I am not 100% sure if the problems resolved, but I will be testing it over the next couple of months