pc reboots whenever any game is run

[averageblackguy]

I have recently finished building a pc about a week ago and everything was working fine but yesterday while i was trying to run a game it crashed a few seconds after it starts up then rebooted this happens with every game i play. any help is appreciated

Intel Core i7 4790K CPU
Intel 300 Series 180GB SSD
MSI Z97-G45 gaming motherboard
MSI GTX 960 GAMING 2G
Seagate Barracuda 3TB hard drive
Corsair Vengeance 8 GB DDR3 RAM
Corsair cs750m power supply
Corsair H100i
Corsair SP Quiet fans
Cooler Master CM Storm Scout II case

 

[turkey3_scratch]

What are the temperatures of the GPU and CPU?

 

[geofelt]

What might have changed between when you were running good and now?

Graphics driver change?
Perhaps a graphics card power lead has loosened?

 

[averageblackguy]

What are the temperatures of the GPU and CPU?

I accidentally marked your response as solved i appologize and when my computer crashes the gpu was at 24c and my cpu stayed below 30c

 

[averageblackguy]

What might have changed between when you were running good and now?

Graphics driver change?
Perhaps a graphics card power lead has loosened?

I checked to see if any of the chords had loosened but they seemed to be in good

 

[mrmike_49]

any error messages? What speed are you running cpu at? what Vcore?