I found this in the "AI" hits results:
"Intel Arc GPUs don't natively support DX9, so they need to work harder to run these games.
This means that GPUs with lower performance might outperform Intel's offerings on DX9 games.
D3D9on12 is an open-source mapping layer that helps make DX9 compatible with Intel Arc GPUs.
The native DirectX 9 implementation is designed to work with specific games, such as Guild Wars 2 and Stellaris.
For other DX9 titles, the Arc GPU will use emulation."
As usual with all things'computer', your mileage may vary...
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