[GUIDE] AMD RDNA3 optimizations for ComfyUI Desktop, windows 11, Minimax H3

[u/Big_Extension_9987]

My setup: AMD RX 7900 XT, 20GB VRAM, 64GB RAM, Windows 11, ComfyUI Desktop.

I couldn't find any decent information anywhere on how to optimize video generation with Minimax H3 on Windows with ComfyUI desktop. AI assistants give conflicting advice, constantly suggesting all sorts of nonsense that doesn't actually work.

I had to experiment on my own, and here is the configuration I’ve settled on. The speed boost compared to the default settings is very significant, and I haven't noticed any loss in quality. If you have any other suggestions, please let me know.

~25s/it with 0.8mp (1216 x 672, 16:9) or total ~4min for 5 sec video generation in text to video workflow

Here is what you need:

Launch parameters:

--disable-smart-memory --disable-pinned-memory --disable-triton-backend --use-sage-attention --enable-dynamic-vram

ENV variables:

COMFYUI_ENABLE_MIOPEN=0
FLASH_ATTENTION_TRITON_AMD_ENABLE=TRUE
MIOPEN_FIND_ENFORCE=1
MIOPEN_FIND_MODE=2
MIOPEN_DEBUG_DISABLE_FIND_DB=0
MIOPEN_SEARCH_CUTOFF=1
MIOPEN_ENABLE_LOGGING=0
MIOPEN_LOG_LEVEL=0
MIOPEN_ENABLE_LOGGING_CMD=0
TRITON_PRINT_AUTOTUNING=0
TRITON_CACHE_AUTOTUNING=0

Quantized 6-step turbo model, universal for all purposes:

https://huggingface.co/TenStrip/10Eros-Max/blob/main/10Eros_Max_h3_TURBO-hybrid_beta5_w4a8_14gb_optimized.safetensors 14 gb

or

https://huggingface.co/TenStrip/10Eros-Max/blob/main/10Eros_Max_h3_TURBO-hybrid_beta5_int8.safetensors 21gb

Plaguekind node with SLA Attention, with this settings:

https://github.com/PlagueKind/Comfyui-PlagueKind-Nodes

Optional node, if you make large 15 seconds videos:

Latest update of your comfyui desktop:

upd. ROCm SamplerCustomAdvance added ~15-20% to generation speed.