Mein Rechner nimmt keine anderen Grafikkarten an

Moin, mein Rechner nimmt keine anderen Grafikkarten an, woran kann es liegen? Ich weiß nicht weiter, hab mich schon im BIOS ausgetobt, wie zb. Onboard Grafik ausstellen. Ware über jede Antwort dankbar. Mfg Ch.Suhr


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System Information
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Time of this report: 11/13/2016, 14:32:20
       Machine name: CHRESTENBECKY
   Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110408-1631)
           Language: German (Regional Setting: German)
System Manufacturer: Hewlett-Packard
       System Model: p6746de
               BIOS: Ver: CHI_715.ROM vCHI7.15
          Processor: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 CPUs), ~3.4GHz
             Memory: 10240MB RAM
Available OS Memory: 10222MB RAM
          Page File: 4279MB used, 16163MB 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 64bit Unicode

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DxDiag Notes
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      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
        Sound Tab 3: No problems found.
        Sound Tab 4: No problems found.
          Input Tab: No problems found.

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DirectX Debug Levels
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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)

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Display Devices
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          Card name: AMD Radeon HD 6570 
       Manufacturer: ATI Technologies Inc.
          Chip type: ATI display adapter (0x6759)
           DAC type: Internal DAC(400MHz)
         Device Key: Enum\PCI\VEN_1002&DEV_6759&SUBSYS_908F1B0A&REV_00
     Display Memory: 994 MB
   Dedicated Memory: 2031 MB
      Shared Memory: 3059 MB