Erreur critique Kernel Power

Bonjour, Voilà depuis quelques temps lorsque je joue mon PC crash sévèrement, pas de Blue Screen mais quelque chose qui s'y apparente: L'audio bug et se transforme en bourdonnement absolument innommable et quant à l'image je ne vois que des traits horizontaux coupé ça et là par d'autre qui partent en décalés. Et de différentes couleurs.
Donc c'est ici que je viens chercher une réponse. J'ai déjà chercher un peu sur le net et j'ai vu que quelqu'un avait passé ses settings d'alimentation en performance élevée, réglant ainsi tous ses problèmes. Ça ne fonctionne pas pour moi.

Voici les propriétés de l'erreur:

Log Name:      System
Source:        Microsoft-Windows-Kernel-Power
Date:          5/5/2013 11:46:23 AM
Event ID:      41
Task Category: (63)
Level:         Critical
Keywords:      (2)
User:          SYSTEM
Computer:      Virgile-PC
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event 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="2013-05-05T09:46:23.328125000Z" />
    <EventRecordID>129869</EventRecordID>
    <Correlation />
    <Execution ProcessID="4" ThreadID="8" />
    <Channel>System</Channel>
    <Computer>Virgile-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>

et les caractéristique DxDiag si ça intérèsse quelqu'un:

------------------
System Information
------------------
Time of this report: 5/5/2013, 12:00:58
       Machine name: VIRGILE-PC
   Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
           Language: English (Regional Setting: English)
System Manufacturer: To Be Filled By O.E.M.
       System Model: To Be Filled By O.E.M.
               BIOS: Default System BIOS
          Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5600+ (2 CPUs), ~2.9GHz
             Memory: 2048MB RAM
Available OS Memory: 2048MB RAM
          Page File: 1790MB used, 2303MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.01.7601.17514 32bit Unicode

------------
DxDiag Notes
------------
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
          Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

---------------
Display Devices
---------------
          Card name: AMD Radeon HD 7900 Series
       Manufacturer: Advanced Micro Devices, Inc.
          Chip type: AMD Radeon Graphics Processor (0x679A)
           DAC type: Internal DAC(400MHz)
         Device Key: Enum\PCI\VEN_1002&DEV_679A&SUBSYS_3000174B&REV_00
     Display Memory: 3826 MB
   Dedicated Memory: 3059 MB
      Shared Memory: 767 MB
       Current Mode: 1920 x 1080 (32 bit) (60Hz)
       Monitor Name: Generic PnP Monitor
      Monitor Model: G226HQL
         Monitor Id: ACR02EA
        Native Mode: 1920 x 1080(p) (60.000Hz)
        Output Type: HD15
        Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1172 (English)
     Driver Version: 9.12.0.0
        DDI Version: 11
       Driver Model: WDDM 1.1
  Driver Attributes: Final Retail
   Driver Date/Size: 12/19/2012 22:08:04, 1151488 bytes
        WHQL Logo'd: Yes
    WHQL Date Stamp: 
  Device Identifier: {D7B71EE2-24DA-11CF-6F70-0A10BEC2C535}
          Vendor ID: 0x1002
          Device ID: 0x679A
          SubSys ID: 0x3000174B
        Revision ID: 0x0000

-------------
Sound Devices
-------------
            Description: Speakers (High Definition Audio Device)
 Default Sound Playback: Yes
 Default Voice Playback: Yes
            Hardware ID: HDAUDIO\FUNC_01&VEN_1106&DEV_4397&SUBSYS_18490397&REV_1000
        Manufacturer ID: 1
             Product ID: 65535
                   Type: WDM
            Driver Name: HdAudio.sys
         Driver Version: 6.01.7601.17514 (English)
      Driver Attributes: Final Retail
            WHQL Logo'd: Yes
          Date and Size: 11/20/2010 12:44:23, 350208 bytes
            Other Files: 
        Driver Provider: Microsoft
         HW Accel Level: Basic
              Cap Flags: 0xF1F
    Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
 Static/Strm HW 3D Bufs: 0, 0
              HW Memory: 0
       Voice Management: No
 EAX(tm) 2.0 Listen/Src: No, No
   I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No

J'ai coupé parce que c'est trop long. J'ai pris le plus important je crois, faite le moi savoir si vous avez besoin d'autre chose. Merci d'avance !