My pc shuts down

[DunyaKingdom]

Recently when I open any game (AC: Syndicate, Fallout 4 or Game of Thrones: Telltale Game) my computer shuts down and after 2-3 seconds starts booting again. (here the video: https://www.youtube.com/watch?v=jKExDrdZrsA) This happens most of the time at the main menu.

You may be thinking ''it sounds like a PSU problem'' but is hard to tell because the only change i've done on my computer the last two weeks was the motherboard (from a H81 motherboard to my current mobo, the Z97x Gaming 5 from Gigabyte)

I don't think it's a PSU problem (but it could be...?), mostly because I was running on my old motherboard a overclocked i5-4690k at 4.3Ghz and a GTX 960 but I didn't make any overclock to my new motherboard. I installed windows 8.1 and 10 but are not working, so I don't know if it is a drivers problem with the new motherboard or what

Btw, temps are fine (CPU and GPU 60º average when gaming)

i5-4690k 3.5
MSI GTX 960 2G
G.Skill 1600 4x4 16GB
Keep Out FX850 850W 85Plus

Any idea? 🙁

 

[plasmastorm]

I would suggest oc'ing the cpu to the same state you had previously. Running higher voltage (which i assume you did) on a previous OC can degrade the cpu meaning it may require slightly more vcore to run now.

Also check that the heatsink is seated properly, it may just be overheating.

 

[DunyaKingdom]

I've tested my PC with BurnInTest and FurMark but my computer didn't shut down. Also, when I opened Game of Thrones for the first time my computer died, but the second time it didn't, like 2 hours playing the game and my computer didn't shut down after the first time. Seems to be more frecuently with games like AC: Syndicate and Fallout 4. As an extra info, this never happens while playing League of Legends.