Graphic card crashing whole computer

[Nerfbilly64]

I have a computer from cyberpower and I wanted to upgrade my graphics card from the R5 230 to the EVGA 750 Ti superclocked. after I replaced It, my computer crashes and restarts when ever I play a graphic intensive game like state of decay. Does anyone know why It would crash like this? the only thing I can find is that the mother board has PCI e 2.0 and the GPU has a PCI e 3.0.
Here are the specs for the Pc: http://www.newegg.com/Product/Product.aspx?Item=N82E16883229566

And the new graphics card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814487024

Update: I have some new Info about the crashing from the event viewer.

First event:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. - Kernel-Power (Critical)

2nd:
The computer has rebooted from a bugcheck. The bugcheck was: 0x00000124 (0x0000000000000000, 0xffffe0012006c038, 0x0000000000000000, 0x0000000000000000). A dump was saved in: C:\Windows\Minidump\111014-25171-01.dmp. Report Id: 111014-25171-01.
-BugCheck (Error

3rd:
The AODDriver4.3 service failed to start due to the following error:
The system cannot find the file specified. -Service Control Manager (Error)

4th:
A fatal hardware error has occurred.

Component: AMD Northbridge
Error Source: Machine Check Exception
Error Type: HyperTransport Watchdog Timeout Error
Processor APIC ID: 0

The details view of this entry contains further information. -WHEA-Logger (Error)

 

[Nerfbilly64]

I figured it out, it was the power supply.