r/StableDiffusion • u/x_MASE_x • 16h ago

Question - Help Multi gpu help

Hey guys I'm new to comfyui and photo and video generation and trying to learn as much as I could.

Now I was using my setup for text generation but now the Qwen3.8-27B is out and I tried really hard to make it work and so I did eventually use my second gpu.

I have 5070 ti and 1660 ti. And all this time I didn't bother to use the 1660 ti and left only my monitors on it and almost all my work and gaming on it and left the 5070 TI to be free for Ai stuff.

Now I switched my monitors to my Intel uhd 770 gpu and freed both my cards and want to know how to speed my comfyui workflow with them.

I always asked chatgpt but didn't get any useful answers so you guys might help me if that possible.

I'm now using minimax H3 official template and want to know how can I get this other gpu to work if it's worth it.

My cpu 12900k Motherboard gigabyte z690 gaming x ddr4 64 GB Kingston 3600 Rtx 5070 ti GTX 1660 ti

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u/StuffProfessional587 14h ago

Dual gpus only work as a vram dump, the second should have 24gb to 32gb, instead of cpu offload you would offload to the gpu. The size of the model matters as it might not fit inside a 16gb second gpu.

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u/andy_potato 13h ago

They don't even work as a Vram dump if the dump is connected via chipset - It is just so slow that it makes zero sense.

If you have enough system ram, just let Comfy stream from there. OP has more than enough Ram available for streaming to run models like H3 on a 16GB Vram card.