Problème avec seven!

Bonjour,
Je vous demande à l'aide!!!
J'ai Seven Ultimate 32bit depuis Novembre Génial rien a redire! sauf que j'avais une carte graphique Nvidia GeForce 9600GT 1GB DDR3 et Cela marchais Bien! J'ai changer de Carte pour une ASUS Ati serie EAH5770 1GB DDR5 !!! Depuis ca Galère, mon PC est plus lent au démarage, je n'arrive pas à installer Catalyse d'ATI car le PC plante voici le code d'erreur:
Signature du problème :
Nom d’événement de problème: BlueScreen
Version du système: 6.1.7600.2.0.0.256.1
Identificateur de paramètres régionaux: 2060
Informations supplémentaires sur le problème :
BCCode: 1000007f
BCP1: 00000008
BCP2: 8DD03750
BCP3: 00000000
BCP4: 00000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1
En plus les jeux du style Colin Mcrea Dirt, Need for SPEED cela tourne avec de petit lag!!!
Mes tous mes jeux Steam :CounterStrike:Source, Crysis,... Crash Systeme ecrant bleu je ne c'est plus quoi faire!!! donc s'y je lance une réinstall mon PC plante et en mode sans echec impossible d'installer

Configuration: System Information
------------------
Time of this report: 12/11/2009, 19:28:25
   Operating System: Windows 7 Édition Intégrale 32-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
           Language: French (Regional Setting: French)
System Manufacturer: System manufacturer
       System Model: P5QL PRO
               BIOS: BIOS Date: 10/08/08 16:37:00 Ver: 08.00.14
          Processor: Intel(R) Core(TM)2 Quad  CPU   Q8200  @ 2.33GHz (4 CPUs), ~2.3GHz
             Memory: 4096MB RAM
Available OS Memory: 3328MB RAM
          Page File: 1547MB used, 5104MB 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: 6.01.7600.16385 32bit Unicode
          Card name: ASUS EAH5770 Series
       Manufacturer: ATI Technologies Inc.
          Chip type: ATI display adapter (0x68B8)
           DAC type: Internal DAC(400MHz)
         Device Key: Enum\PCI\VEN_1002&DEV_68B8&SUBSYS_033E1043&REV_00
     Display Memory: 2422 MB
   Dedicated Memory: 1015 MB
      Shared Memory: 1407 MB
       Current Mode: 1680 x 1050 (32 bit) (60Hz)
       Monitor Name: SyncMaster T220/T220G,SyncMaster Magic T220/T220G(Digital)
      Monitor Model: SyncMaster
         Monitor Id: SAM03E5
        Native Mode: 1680 x 1050(p) (59.883Hz)
        Output Type: DVI
        Driver Name: atiumdag.dll,atidxx32.dll,atidxx32.dll,atiumdva.cap
Driver File Version: 8.14.0010.0708 (English)
     Driver Version: 8.670.0.0
        DDI Version: 10.1
       Driver Model: WDDM 1.1
  Driver Attributes: Final Retail
   Driver Date/Size: 10/19/2009 20:56:22, 3601920 bytes
        WHQL Logo'd: No
    WHQL Date Stamp: None
  Device Identifier: {D7B71EE2-2BF8-11CF-C372-3423A1C2CA35}
          Vendor ID: 0x1002
          Device ID: 0x68B8
          SubSys ID: 0x033E1043
        Revision ID: 0x0000
 Driver Strong Name: oem15.inf:ATI.Mfg.NTx86.6.1:ati2mtag_Evergreen:8.670.0.0:pci\ven_1002&dev_68b8
     Rank Of Driver: 00E62001
        Video Accel: ModeMPEG2_A ModeMPEG2_C 
          Card name: ASUS EAH5770 Series
       Manufacturer: ATI Technologies Inc.
          Chip type: ATI display adapter (0x68B8)
           DAC type: Internal DAC(400MHz)
         Device Key: Enum\PCI\VEN_1002&DEV_68B8&SUBSYS_033E1043&REV_00
     Display Memory: 2422 MB
   Dedicated Memory: 1015 MB
      Shared Memory: 1407 MB
       Current Mode: 1024 x 768 (32 bit) (85Hz)
       Monitor Name: Moniteur Plug-and-Play générique
      Monitor Model: HP 7540
         Monitor Id: HWP2636
        Native Mode: 1024 x 768(p) (84.997Hz)
        Output Type: HD15
        Driver Name: atiumdag.dll,atidxx32.dll,atidxx32.dll,atiumdva.cap
Driver File Version: 8.14.0010.0708 (English)
     Driver Version: 8.670.0.0
        DDI Version: 10.1
       Driver Model: WDDM 1.1
  Driver Attributes: Final Retail
   Driver Date/Size: 10/19/2009 20:56:22, 3601920 bytes
        WHQL Logo'd: No
    WHQL Date Stamp: None
  Device Identifier: {D7B71EE2-2BF8-11CF-C372-3423A1C2CA35}
          Vendor ID: 0x1002
          Device ID: 0x68B8
          SubSys ID: 0x033E1043
        Revision ID: 0x0000
 Driver Strong Name: oem15.inf:ATI.Mfg.NTx86.6.1:ati2mtag_Evergreen:8.670.0.0:pci\ven_1002&dev_68b8
     Rank Of Driver: 00E62001
        Video Accel: ModeMPEG2_A ModeMPEG2_C 
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