CODEWITHSUNDEEP
directx-12
user3546481
user3546481

Reputation: 117

Directx 12 - Adapter not supported

I am currently using a nvidia 675M and in directx 11 I was fine running with feature level 11_0

I am following guides for directx 12 and they say I can still create a device with the feature level 11_0 but when I run it says it is not supported

I know 100% I'm using the correct adapter as it says 675m

So just wondered if there is any way around this or another method or if simply I need a new graphics card :(

Upvotes: 0

Views: 1336

Answers (3)

Dennis Mungai
Dennis Mungai

Reputation: 1699

Initial support for DirectX 12 in Fermi was introduced in the current R384.76, as observed by users on Guru3D here and here, although the driver release notes do not state this.

You may want to run 3DMark Time Spy or a similar DirectX 12 workload to confirm this.

Upvotes: 0

Chuck Walbourn
Chuck Walbourn

Reputation: 41057

The NVidia 675M is a "Fermi" GPU which should be supported for DirectX 12 by NVIDIA per this post. The initial focus for NVidia's DX12 driver support is their Maxwell and Kepler parts, so check with NVidia for a driver that supports Fermi.

Another issue to keep in mind is that in systems with more than one graphics card, you need to be sure you are in fact picking the right adapter. The DirectX 12 VS templates use the following code to achieve this:

void DX::DeviceResources::GetAdapter(IDXGIAdapter1** ppAdapter)
{
    *ppAdapter = nullptr;

    ComPtr<IDXGIAdapter1> adapter;
    for (UINT adapterIndex = 0; DXGI_ERROR_NOT_FOUND != m_dxgiFactory->EnumAdapters1(adapterIndex, adapter.ReleaseAndGetAddressOf()); ++adapterIndex)
    {
        DXGI_ADAPTER_DESC1 desc;
        DX::ThrowIfFailed(adapter->GetDesc1(&desc));

        if (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE)
        {
            // Don't select the Basic Render Driver adapter.
            continue;
        }

        // Check to see if the adapter supports Direct3D 12, but don't create the actual device yet.
        if (SUCCEEDED(D3D12CreateDevice(adapter.Get(), m_d3dMinFeatureLevel, _uuidof(ID3D12Device), nullptr)))
        {
#ifdef _DEBUG
            WCHAR buff[256] = {};
            swprintf_s(buff, L"Direct3D Adapter (%u): VID:%04X, PID:%04X - %ls\n", adapterIndex, desc.VendorId, desc.DeviceId, desc.Description);
            OutputDebugStringW(buff);
#endif
            break;
        }
    }

#if !defined(NDEBUG)
    if (!adapter)
    {
        // Try WARP12 instead
        if (FAILED(m_dxgiFactory->EnumWarpAdapter(IID_PPV_ARGS(adapter.ReleaseAndGetAddressOf()))))
        {
            throw std::exception("WARP12 not available. Enable the 'Graphics Tools' feature-on-demand");
        }

        OutputDebugStringA("Direct3D Adapter - WARP12\n");
    }
#endif

    if (!adapter)
    {
        throw std::exception("No Direct3D 12 device found");
    }

    *ppAdapter = adapter.Detach();
}

Upvotes: 1

Adam Miles
Adam Miles

Reputation: 3584

NVIDIA have not yet released a driver that supports DX12 on Fermi, so this won't work.

Upvotes: 0

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