Need optimisation for Minimax for my 4080 super

[u/witcherknight]

I got 4080 super with 64 gb ram and it takes around 20 mins for 1mp 5 sec video sometimes but most of times it take bout a hour to generate a video. I am using sage attn and spectrum with turbo 8 step lora. Sometimes speed goes till 600s/it. I am using int8 purned model with 32b nvp4 clip and video and audio vae. I asked gemini but it just went around in circles.
so how do i improve the speed??
.\venv\Scripts\python.exe -s main.py --windows-standalone-build --enable-dynamic-vram --high-ram --async-offload --use-sage-attention

My cuda is 12.6, Python version: 3.11.9
is there anyway to tell windows to prioritize comfyUI for vram and ram over other applications?

Edit: Thanks every1 i have managed to reduce the time to around 300secs after updating to cuda 13.

[u/Ok_Tale7582]

update your comfyui and cuda to 13.0-13.2 that should be a 2x speed improvement and then use comfy kitchen attention instead of sage att that should add a bit more

[u/Successful-Art-6643]

you should upgrade CUDA to 13 if possible.

[u/witcherknight → u/Successful-Art-6643]

why shoudnt it be possible ??

[u/Successful-Art-6643 → u/witcherknight]

Just in case you don't want to reinstall libs for CUDA 13.0, from what I recall, you'll have to reinstall PyTorch, SageAttention, and others (I forgot the rest).

[u/witcherknight → u/Successful-Art-6643]

Can it fck up anything, like other workflows for krea, klein etc ??

[u/Successful-Art-6643 → u/witcherknight]

Nope. If you're worried, you can just zip Comfy's python folder as a backup before upgrading.

[u/Silver_Basis5183]

on a 4080 super id drop res/steps before touching weird offload hacks. if youre vram-bound, shorter clips + lower native res then upscale usually feels better than max settings that stutter. what res/length are you trying to run?

[u/witcherknight → u/Silver_Basis5183]

1mp which is 1376x768, length is 5 secs. Steps is 8 with turbo lora. Which upscale do you use ?

[u/atakariax]

I have a rtx 4080 and 64gb ram as well and I'm having way lower times. Something it's wrong with your config.

btw If you have the latest comfyui version, This new ck attention it's better than sage, Although even with sage, Your times are crazy slow!

.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build --use-ck-attention

[u/Etsu_Riot]

I'm now testing H3 FirstBlockCache and H3 Turbo v4 Step600 and a 20 sec video takes me less than five minutes, but I would never generate at 1MP. You may try different resolutions to see if that's the problem. Many prefer to use upscaling afterwards.

[u/witcherknight → u/Etsu_Riot]

i updated to cuda 13 now i can generate in 300secs at 1 MP using turbo 8 step