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Are DX10 GPU supported ?

Hi,

my GPU card died a few days ago and I'm planning on replacing it in a few days. I'm a curious guy so I installed an old gpu I had (ATI HD 4850X2) while waiting for my new GPU and launched Rocket with it. With a surprise I discovered that rocket started successfully without errors other than the need to recompile the shaders (a lot of shaders).

I was wondering if the engine already supports DX10/DX9 cards or only the DX11 shaders for the moment ?

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asked Mar 11 '14 at 03:07 AM in Using UE4

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We support both Shader Model 5 (DX11) and Shader Model 4 (DX10) cards for UE4. As Oscar mentions you can force the engine to use the Shader Model 4 support path with "-d3d10" on the command line. Obviously some features that require DX11 will not work: tessellation, reflection environment, and sorted GPU particles for example.

At this time we are not supporting Shader Model 3 (DX9).

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answered Mar 11 '14 at 03:07 AM

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avatar image ue4-archive ♦♦ STAFF Mar 11 '14 at 03:07 AM

That's great ! Back on Rocket then !

Thanks for the quick answer.

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I tried forcing it to run in DX10 and it worked. it did take a while to re-compile the already-working shaders, which I took as a positive sign that it was indeed compiling the shaders into DX10. and in the main window title I could see PCD3D_SM4 instead of PCD3D_SM5.

then again, everything looked the same as in DX11, except maybe the skin shader. but keep in mind I'm running a test character on a test map, nothing fancy.

to make this work I ran Rocket.exe -d3d10

now, DX9? sadly it's not supported at all and at some point they stated that for now they have no plans to change this.

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answered Mar 11 '14 at 03:07 AM

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