Sudden shutdown

[winters\]

My PC suddenly turned off while I was in a gaming session, no smells or sudden pops just game and then black screen. PC will not power on when GPU has power supply connected. PC will power on when GPU is not connected to the power supply. When powered on mouse and keybaord are no longer given power. I think it is the motherboard but since I have no way of testing that I am hoping for confirmation. I was able to test a new power supply and it did the same thing.(same brand and model)

OS: Windows 10(64bit)
PSU: RM 850X Corsair
GPU: GTX 98ti EVGA
CPU: I7 6700K
RAM: Ripjaws 32gig (4 sticks)
MOBO: ASUS Z170 Sabertooth

[KarathKasun]

Dead GPU.

 

Pull it out and see if it boots with integrated graphics.

[winters\]

Thanks, it powered up without the GPU.