Automatically selected the dedicated graphics card.

The choice of the graphics cards appears to be random and nontransparent:

https://uc7b04bcb73b8b6abddf797fedb7.dl.dropboxusercontent.com/cd/0/inline/CbNDCbYz6bQK-f7aenAYId7Pcr-KyAEznr0ZDcJ9atzjw-Hq_H_OhRwQFyk8mcprWNz1IQjQvV7S9Erpr1sxYJHutUJQ0cwXuLy3Xmzhn1qkvVcqbfZcFkwHiCWu_TZBjT8/file#

ChatGPT suggests these solutions:

To indicate that your SharpDX application prefers to use the dedicated graphics card (like an NVIDIA RTX) instead of the integrated graphics card, you can use a few methods:

1. Set Preferred Graphics Processor in the NVIDIA Control Panel (User Configuration):

Go to the NVIDIA Control Panel → "Manage 3D settings."
Under "Program Settings," add your SharpDX application and set it to use the "High-performance NVIDIA processor."

This allows users to choose their preferred GPU, but it doesn't enforce the choice programmatically from within the application.

2. Use DXGI to Specify High-Performance GPU in Code (Programmatic Approach):

Since Windows 10 (version 1803), Microsoft provides an API that allows applications to request the high-performance GPU.

Here’s how you can do it programmatically using the DXGI interface in SharpDX:

using SharpDX.DXGI;

// Create a factory to enumerate adapters
using (var factory = new Factory4())
{
    Adapter1 adapter = null;

    // Iterate through all adapters
    for (int i = 0; i < factory.Adapters1.Length; i++)
    {
        var tmpAdapter = factory.GetAdapter1(i);
        var desc = tmpAdapter.Description1;

        // Check if the adapter is the high-performance GPU
        if ((desc.Flags & AdapterFlags.Software) == 0 && tmpAdapter.Description1.DeviceId != 0)
        {
            adapter = tmpAdapter;
            break;
        }
    }

    // Create the device using the high-performance adapter
    if (adapter != null)
    {
        var device = new SharpDX.Direct3D11.Device(adapter);
    }
    else
    {
        throw new Exception("No high-performance GPU found.");
    }
}

3. Directly Specify GPU for Windows (DX12):

For more control, especially in DirectX 12, you can query available GPUs and select the high-performance one based on its hardware type (discrete vs. integrated). However, SharpDX mostly works with DirectX 11, and the method above works for DX11 applications.

4. High Performance GPU via `app.manifest`:

You can also indicate GPU preference at the manifest level for Windows:

<application xmlns="urn:schemas-microsoft-com:asm.v3">
  <windowsSettings>
    <useLegacyGraphicsPerformanceNotifications>false</useLegacyGraphicsPerformanceNotifications>
  </windowsSettings>
</application>

This will tell the system to prefer the high-performance GPU.

By combining these approaches, your application can better target dedicated GPUs without requiring manual user configuration.

tooll3 / t3