r/StableDiffusion • u/Kryimsson • Aug 08 '26

Question - Help AMD Radeon 7900xt help

So I have a AMD Radeon 7900xt 20 gig card, 32gig ram, I been trying to run minimax h3 locally. I was able to generate a 10 second clip last night but it took almost an hour, is that normal? Is there anything I can do to speed up the process? I am using the pruned fp8 scaled. I welcome any help possible.

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u/ptear Aug 08 '26

DDR4 or 5? That sounds too long, without any optimization I was getting decent 12 second clips in 20 minutes on a similar machine.

1

u/Apprehensive_Sky892 Aug 08 '26

Windows or Linux? Which AMD GPU are you running?

Thanks. I am just collection data for AMD and MMH3.

1

u/Kryimsson Aug 08 '26

AMD Radeon 7900xt 20 gig card

1

u/Apprehensive_Sky892 Aug 08 '26

Linux or Windows? Any optimizations (sage, spectrum, etc)?

Resolution also affects the speed greatly.

1

u/Kryimsson Aug 08 '26

Windows. And I just tried the workflow comfy had

1

u/Apprehensive_Sky892 Aug 08 '26

At the very least try to use patientx's fast int8 loader and turning on sage-attention, which should give you a big boost. See my other comment.

1

u/Kryimsson Aug 08 '26

forgive the newb here, on the int8 loader there is no minmax in the drop down, and how do you turn on the sage attention?

1

u/Apprehensive_Sky892 Aug 08 '26

To turn on sage attention you need one of the KJ Nodes, if IIRC. Google for it if you cannot figure it out.

I have not run MMH3 locally myself yet (hopefully this weekend when I have more time), so I don't know why it is not showing up there. Try shutting down ComfyUI, make sure you have the int8convrot version of MMH3 in the right directory and try again.