Accurately Determining Hardware Supported DirectX Level?

[rcmaehl]

Hi all,

I was hoping that GPU-Z could share a reliable way to query the Hardware Supported DirectX Level via DXDiag or a DLL call.

I know that I can't rely on "DirectX Version" as even a 8600 GT will report DirectX Version 12

I was previously using DDI version, however I have reports of people having that not much up to what their card supports.

For Example, this UHD 730 which supports DirectX 12.1 reports DDI 11.1:

Will I just end up having to create a database of edge cases, or is there someway to poll DirectX or WIndows to get this accurately?

Thanks in advance!

 

[windwhirl]

You'd definitely have to wait until someone with programming experience comes by, but aren't you supposed to query the feature level instead of DDI?

Hardware Feature Levels - Win32 apps

Describes the functionality of the 11\_0 through 12\_1 hardware feature levels.

docs.microsoft.com

ID3D12Device::CheckFeatureSupport (d3d12.h) - Win32 apps

Gets information about the features that are supported by the current graphics driver. (ID3D12Device.CheckFeatureSupport)

docs.microsoft.com

 

[rcmaehl]

You'd definitely have to wait until someone with programming experience comes by, but aren't you supposed to query the feature level instead of DDI?

Hardware Feature Levels - Win32 apps

Describes the functionality of the 11\_0 through 12\_1 hardware feature levels.

docs.microsoft.com

ID3D12Device::CheckFeatureSupport (d3d12.h) - Win32 apps

Gets information about the features that are supported by the current graphics driver. (ID3D12Device.CheckFeatureSupport)

docs.microsoft.com

I just checked and I'm pretty sure you're right. The 8600M only went to Feature Level 10 which would be DX10.

Thanks

 

[W1zzard]

Create a context and check feature levels. This will give you what the current system supports, not what the underlying hardware supports.

For GPU-Z I'm using a lookup table. No other way to report "DX12 capable: Yes" on Windows XP or Windows 7

 

[qubit]

Unbelievable that something as simple as hardware version support should be so impossible to determine. I wonder if it's obfuscated like this deliberately.

 

[windwhirl]

Unbelievable that something as simple as hardware version support should be so impossible to determine. I wonder if it's obfuscated like this deliberately.

From what I read, DDI is the driver interface. So, I suppose the DDI version is simply an indication of which DirectX version the driver was compiled/built for. Doesn't necessarily mean the driver supports all DX features.