dxdiag showing the wrong graphics card

do u have a laptop or PC?

You seem to have a notebook with both onboard Intel graphics and a mobile nVidia graphics adapter.

Optimus Technology

I have no personal experience with it. I suppose that there must be some way to force the use of the nVidia adapter when it isn't used automatically, but I don't know what it is.

I have exactly the same problem. My notebook has 2 graphic cards:
- Intel HD Graphics 3000 (onboard) and
- nVidia GeForce GT 640M (discrete)
but dxdiag displays the onboard Intel instead of the nVidia.

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System Information
------------------
Time of this report: 7/19/2012, 00:33:34
Machine name: TOURIST
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120503-2030)
Language: Greek (Regional Setting: Greek)
System Manufacturer: CLEVO CO.
System Model: W250ENQ / W270ENQ
BIOS: BIOS Date: 05/09/12 13:54:08 Ver: 04.06.05
Processor: Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz (4 CPUs), ~2.5GHz
Memory: 6144MB RAM
Available OS Memory: 6034MB RAM
Page File: 3735MB used, 8331MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: 120 DPI (125 percent)
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: Intel(R) HD Graphics 3000
Manufacturer: Intel Corporation
Chip type: Intel(R) HD Graphics Family
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_0126&SUBSYS_27011558&REV_09
Display Memory: 4043 MB
Dedicated Memory: 1995 MB
Shared Memory: 2047 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: CMO1719
Native Mode: 1600 x 900(p) (60.008Hz)
Output Type: Internal
Driver Name: igdumd64.dll,igd10umd64.dll,igd10umd64.dll,igdumd32,igd10umd32,igd10umd32
Driver File Version: 8.15.0010.2712 (English)
Driver Version: 8.15.10.2712
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 3/26/2012 14:09:58, 8087040 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
Device Identifier: n/a
Vendor ID: n/a
Device ID: n/a
SubSys ID: n/a
Revision ID: n/a
Driver Strong Name: oem6.inf:IntelGfx.NTamd64.6.0:iSNBM0:8.15.10.2712ci\ven_8086&dev_0126
Rank Of Driver: 00E62001
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C

I already tried to change that by using the instructions I found on this page:
How to Make the Onboard Graphics Card Secondary | eHow.com
but my BIOS does not have the needed options.
Does anyone know an alternative way to fix that problem?