pc keeps ctd and random restart

[HuntressLara]

my pc randomly restarts and crashes to desktop i just replaced the psu i have

radeon saphhire twin frozr hd7950 3gb
amd a8-5600k trinity
8 gb ram
SMART-650 watt 80 gold
Gigabyte Technology Co., Ltd. F2A58M-DS2 mother board

most recent crash report it crashes mainly while gaming
Source
Metro Redux Executable

Summary
Stopped working

Date
‎4/‎9/‎2016 9:28 AM

Status
Report sent

Description
Faulting Application Path: C:\Program Files (x86)\Steam\steamapps\common\Metro 2033 Redux\metro.exe

Problem signature
Problem Event Name: APPCRASH
Application Name: metro.exe
Application Version: 1.0.0.3
Application Timestamp: 5411a479
Fault Module Name: metro.exe
Fault Module Version: 1.0.0.3
Fault Module Timestamp: 5411a479
Exception Code: c000041d
Exception Offset: 00000000007ecefc
OS Version: 10.0.10586.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 8279
Additional Information 2: 8279e1239999c24c28f324d7e31182ca
Additional Information 3: 2a4f
Additional Information 4: 2a4f0277fd5d6855800b1cd801ccb568

Extra information about the problem
Bucket ID: 7b9965e1111b5a286d6014b2243b13ec (85959307070)

 

[Lutfij]

Your PSU's rated output may meet your system's requirements but the unit itself doesn't.

Tier Four
Built down to a low price. Not exactly the most stable units ever created. Very basic safety circuitry
or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid
unless your budget dictates your choice.

^ more here.

I would suggest you first turn off automatic device driver updates, then reinstall your GPU drivers following this guide. Please be sure that your motherboard's BIOS and chipset(not to mention your GPU) drivers are up to date.

Do not that your system is seeing a bottleneck on your CPU side since you're relying on the APU's processor to power the 7950. Lastly, where did you get your copy of Metro Redux?