WAN 2.2 / SVI Pro 2 / I2V for 12GB VRAM

V2 - Adds about 30 seconds to generation time, due to NAG and Inject Latent Noise nodes.

SamplerCustomWithNAG replaced the old Custom Samplers. If you do not need Negative prompts and want faster gen times, stick with v1.31.

There is a lot of new stuff to this, so expect some trial and error.

Added CFG High and Low to the settings.

Shift is still 9 for better prompting but if you want to retain more face detail use Shift 5. It's a good trade off though.

Upscale Model:

RealESRGAN_x2plus.pth

please report any BUGS!

Pro Tip!

Mix and Match High/Low Checkpoints:

For example: Try using Smooth Mix High and Dasiwa's Low. I got some interesting results!

Inject Latent Noise

Reduces prompt bleeding/carry over to next stage.

SamplerCustomWithNAG

Open CMD: navigate to ComfyUI/custom_nodes folder.
Run: git clone https://github.com/BigStationW/ComfyUI-NAG
If it fails to install correctly (node not showing up):
File 1: ComfyUI/custom_nodes/ComfyUI-NAG/chroma/layers.py
Line 5:
Change:
from comfy.ldm.chroma.layers import DoubleStreamBlock, SingleStreamBlock
To:
from comfy.ldm.flux.layers import DoubleStreamBlock, SingleStreamBlock
File 2: ComfyUI/custom_nodes/ComfyUI-NAG/chroma/model.py
Lines 9–14:
Change to:
from comfy.ldm.flux.layers import DoubleStreamBlock, SingleStreamBlock
from comfy.ldm.flux.layers import timestep_embedding
from comfy.ldm.flux.layers import (
DoubleStreamBlock,
SingleStreamBlock,
)
from comfy.ldm.chroma.model import Chroma
after, close comfyui (don't restart).

v1.31 - QoL Update and change to Shift Values.

576x832, This is the resolution I've had the most success with.

overlap frames added from subgraph. Recommended to not touch unless you understand what you are changing.
Added Preview Animation and Control Random Seed to each sampler instead of a subgraph in the beginning, this way you can preview each clip as they finish, and let the generation continue endlessly if you're doing batches. Just remember to change it from Fixed -> Randomize. Also, don't forget to change it back to Fixed when happy with generation, otherwise it will just start at Sample 1 again.
Also, use Shift 9.0, it seems much better than 5.0. Don't forget when using ANY video LoRa, especially High LoRas, start them at 0.5-0.6, the low can usually stay safe at 1.0. This will avoid a lot jittery, jelly animations.
If you ever think you lost a seed... just drag the video into Comfyui workspace, and it will always have the seed number it used.
If you dont want endless 'preview animation' -> right-click Preview Window and select 'Reload Node', this can be done during generating as well. Or, you can CTRL+B before generation to disable it. This is a QoL update.

v1.2 - Please update to this version.

Seed per Sample - fixed.

Seed arrangement were out of order. (I'm not sure how this slipped through.)
Added labels on seed per sample.
Tested each seed on each clip and changed seed to make sure its working correctly.

Added a preview image after Resize Image so you can check and compare your image to the original.

For 832x1216 Images use 576x832 resolution if you're using the crop option on resize.

Modified version of [SVI Pro 2.0 for Low VRAM (8GB)]

And [Wan2.2 SVI Pro Example KJ]

7 Stage Sample Setup, with each Stage having their own Loras, combined with Sage Attention Cuda for faster speeds.
Can save each stage clip if needed.
Final Output w/ Upscaler + RIFE for smooth 60FPS.
Fast Group Bypasser - for quick access.

### Required Models & LoRAs

GGUF Main Models:

* [DaSiWa-Wan 2.2 I2V] or

* [Smooth Mix Version] or

* [Enhanced NSFW Camera Prompt Adherence]

> Note: Use a suitable quantization (e.g., Q4 or Q5) based on your available VRAM. I highly recommend DaSiWa-Wan high/low Models, as the Lightning Loras are BAKED in, leaving you only with SVI Loras being required.

SVI PRO LoRAs (Wan2.2-I2V-A14B):

* Both Required

[SVI PRO - HIGH (Rank 128)]

[SVI PRO - LOW (Rank 128)]

Text Encoders:

[WAN UMT5] or

[NSFW WAN UMT5]

VAE:

[Wan 2.1 VAE]

The following is for Speed Boosts for nVidia Cards - If its already working then skip this!

Patch Sage Attention Node (sageattn_qk_int8_pv_fp16_cuda) + Model Patch Torch Settings Node (Faster Speed Times):

Prompt executed in 136.56 seconds <- Sage Attention Disable/FP16 Accumulation = Disable/Allow Compile = False

Prompt executed in 104.38 seconds <- Sage Attention Enabled/FP16 Accumulation = Enabled/Allow Compile = False

Prompt executed in 96.26 seconds <-- Sage Attention Enabled/FP16 Accumulation = True/Allow Compile = True

With this setup you can save a massive 40+ seconds just for one Stage!

If Sage Attention is not working/crashing comfyui then do the following or use (CTRL+B to bypass the nodes but I highly recommend getting it working for massive speed boost):

The following is for Comfyui_windows_portable, do not do it this way if you are using a different setup!
- Step 1 — Check your PyTorch + CUDA version

Open CMD in your ComfyUI Portable folder (SAME directory as run_nvidia_gpu.bat) and run the following command:

.\python_embeded\python.exe -c "import torch; print(torch.__version__, torch.version.cuda)"

output = 2.9.1+cu130 13.0

check Python embeded version:

.\python_embeded\python.exe -V

output = Python 3.13.9

Which Means:

Python: 3.13 (embeded)

PyTorch: 2.9.1

CUDA: 13.0

Warning! If you are unsure how to proceed with the following steps, then paste your error code into Grok/ChatGPT

for a more detailed analysis.

Pick the wheel that matches your Python + PyTorch + CUDA output from Step 1.

That means the correct SageAttention wheel for your setup would be something like this:

sageattention-2.2.0.post3+cu130torch2.9.0-cp313-cp313-win_amd64.whl

download the correct wheel for your setup from:

[List of Wheels]

It matches Python 3.13 (cp313-cp313), PyTorch 2.9.x, and CUDA 13.0.

The slight difference in patch version (2.9.1 vs 2.9.0) is fine — this wheel works with PyTorch 2.9.x.

Step 2 — Install Wheel (make sure the file is in \ComfyUI_windows_portable, same directory as run_nvidia_gpu.bat)

Open CMD in your ComfyUI Portable folder and run with the correct wheel file (example below):

.\python_embeded\python.exe -m pip install "sageattention-2.2.0.post3+cu130torch2.9.0-cp313-cp313-win_amd64.whl"

Step 3 — How to check if it works:

Open CMD in your ComfyUI Portable folder and run:

.\python_embeded\python.exe -c "import sageattention; print('SageAttention import successful!'); print(dir(sageattention))"

You should see:

SageAttention import successful!

['__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__path__', '__spec__', '_fused', '_qattn_sm80', '_qattn_sm89', '_qattn_sm90', 'core', 'quant', 'sageattn', 'sageattn_qk_int8_pv_fp16_cuda', 'sageattn_qk_int8_pv_fp16_triton', 'sageattn_qk_int8_pv_fp8_cuda', 'sageattn_qk_int8_pv_fp8_cuda_sm90', 'sageattn_varlen', 'triton']

Step 4 — confirm if triton attention mode is available:

Open CMD in your ComfyUI Portable folder and run:

.\python_embeded\python.exe -c "import sageattention; print('SageAttention import successful!'); print('Triton mode available:' , hasattr(sageattention, 'sageattn_qk_int8_pv_fp16_triton'))"

You should see:

SageAttention import successful!

Triton mode available: True

if any triton errors run this command:

.\python_embeded\python.exe -m pip install triton

Step 5 - now you should be able to use "sageattn_qk_int8_pv_fp16_cuda" with Patch Sage Attention + Model patch Torch Settings Nodes properly.

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