is this gpu issue or mobo failure?

so as of late ive had this issue without being able to solve it.
the issue is that when i game bf and change server my pc crashes and i get this odd screen or othertimes its simply black/grey/white.
ive tried other monitors,fresh install other drivers,cables etc but without luck sadly i dont have an xtra desktop i can test with nor a friend nearby who has a desktop.
it all startet when i decided to reinstall windows 7 after i had installed a beta bios driver and i didnt like it, i then went back to the old one and reinstalled windows and my issue startet.

i recorded the issue with my phone: https://www.youtube.com/watch?v=pz3gPcNXovU
and a picture of it:

i went to event viewer and pulled this got this from event viewer btw some of it is in dansish: Lognavn: System
Kilde: Microsoft-Windows-Kernel-Power
Dato: 11-04-2014 21:16:36
Hændelses-id: 41
Opgavekategori 63)
Niveau: Kritisk
Nøgleord: (2)
Bruger: SYSTEM
Computer: p-Pc
Beskrivelse:
Systemet har genstartet uden først at lukke korrekt ned. Denne fejl kan skyldes, at systemet er holdt op med at svare, er gået ned, eller at strømmen forsvandt uventet.
Hændelses-Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>2</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000002</Keywords>
<TimeCreated SystemTime="2014-04-11T19:16:36.590403700Z" />
<EventRecordID>2255</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>p-Pc</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">false</Data>
<Data Name="PowerButtonTimestamp">0</Data>
</EventData>
</Event>







Lognavn: System
Kilde: Microsoft-Windows-Kernel-Power
Dato: 11-04-2014 23:10:05
Hændelses-id: 41
Opgavekategori 63)
Niveau: Kritisk
Nøgleord: (2)
Bruger: SYSTEM
Computer: p-Pc
Beskrivelse:
Systemet har genstartet uden først at lukke korrekt ned. Denne fejl kan skyldes, at systemet er holdt op med at svare, er gået ned, eller at strømmen forsvandt uventet.
Hændelses-Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>2</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000002</Keywords>
<TimeCreated SystemTime="2014-04-11T21:10:05.028802700Z" />
<EventRecordID>2807</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>p-Pc</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">false</Data>
<Data Name="PowerButtonTimestamp">0</Data>
</EventData>
</Event>