My Gaming Computer Shuts off randomly

[BryceRivers]

This Happens when playing games Like Team Fotress 2, COD BO3 etc
Specs
Intel Core I5-6400t
MSI H100M gaming
GTX 730 4gb /Had a 960 2gb but it got messed up
Sentley Xplus 725 Watt

Intel Stock Cooling Fan
Rosewill Stock Fans.

 

[Animus3D]

any additional information? hard to diagnose with "this happens when playing games..."

 

[BryceRivers]

any additional information? hard to diagnose with "this happens when playing games..."

Well When Im Playing Games my Stock Case fan in the back shuts off. When playing a Cpu Demanding game the Computer shuts off and restarts.

 

[Animus3D]

power supply. Get it RMA'd if temps are stable (below 70C and shutting off)
if you want, test it with a different power supply and see if it fixes your problem. Also that watt rating is overkill

 

[BryceRivers]

power supply. Get it RMA'd if temps are stable (below 70C and shutting off)
if you want, test it with a different power supply and see if it fixes your problem. Also that watt rating is overkill

If the problem Is My PSU what replacment would you reccomend as I plan to upgrade Cpu And Gpu later on.