Realistic Vision v5.1
Stableby SG161222
The gold standard for photorealism on SD 1.5. Generates remarkably lifelike portraits with only 4GB VRAM. Massive LoRA and ControlNet ecosystem inherited from SD 1.5.
VRAM requirements, GPU fit, and setup notes for Realistic Vision v5.1, including 8GB/12GB fit guidance where relevant. Recommended runtimes: ComfyUI, Automatic1111, and Diffusers support. Best download size: ~2.0 GB at FP16.
- Best photorealism on SD 1.5
- Only 4GB VRAM needed
- Full SD 1.5 ControlNet/LoRA compatibility
- Excellent portraits with minimal VRAM
Your hardware
Detecting...
Image Quality Benchmarks
Measured quality metrics for Realistic Vision v5.1 outputs.
How often humans prefer this model's output (0-100%)
Visual quality and composition rating (5-9 scale)
VRAM Requirements by Resolution and Precision
Compare which GPUs can run Realistic Vision v5.1 at different precisions. FP8 uses less memory than FP16 when available, and the grade shows how comfortably each GPU handles the workload.
FP16 (full precision)
| Resolution | VRAM Required | RTX 4090 24GB | RTX 3060 12GB | RTX 4060 8GB | MacBook Pro M4 Pro 24GB |
|---|---|---|---|---|---|
| 512×512 | 4.0 GB | S● | S● | S● | S● |
| 768×768 | 4.8 GB | S● | S● | S● | S● |
| 1024×1024 | 5.9 GB | S● | S● | S● | S● |
Optimization Tips
Turbo / LCM distillation
Use distilled scheduler at 4-8 steps for faster iteration
ControlNets available
Add guided generation with 3 adapters (+0.7 GB VRAM each)
Rich LoRA ecosystem
Customize style, characters, and quality with community LoRAs
Run with Python
from diffusers import StableDiffusionPipeline
import torch
pipe = StableDiffusionPipeline.from_pretrained(
"SG161222/Realistic_Vision_V5.1_noVAE",
torch_dtype=torch.float16
)
pipe.to("cuda")
image = pipe(
prompt="your prompt here",
num_inference_steps=25,
guidance_scale=7.5,
height=768,
width=768,
).images[0]
image.save("output.png")Get started
Setup instructions for running Realistic Vision v5.1 locally
1. Download the model
Get the checkpoint from HuggingFace
2. Place in:
ComfyUI/models/checkpoints/3. Launch ComfyUI
python main.pyMemory Breakdown
VRAM allocation at 1024×1024 on RTX 4090 24GB (24 GB)
Estimated Generation Time
Time per image at 1024×1024, 28 steps, FP16.
Sample Outputs
Available Formats, Downloads & Setup
Download Realistic Vision v5.1 in the precision that matches your GPU. Lower precision usually means less VRAM pressure, while higher precision keeps more quality.
| 格式 | 精度 | 大小 | 提供商 | |
|---|---|---|---|---|
| safetensors推荐 | FP16 | 2.0 GB | SG161222 | 下载 |
ControlNet Support
3 ControlNets available for Realistic Vision v5.1. ControlNets add guided image generation (edges, depth, pose) at the cost of extra VRAM.
Canny Edge (SD 1.5)
+0.7 GB VRAMInherits SD 1.5 base model ControlNet compatibility. Edge-based structural guidance.
Depth Map (SD 1.5)
+0.7 GB VRAMInherits SD 1.5 base model ControlNet compatibility. Depth-based spatial control.
OpenPose (SD 1.5)
+0.7 GB VRAMInherits SD 1.5 base model ControlNet compatibility. Human pose control.
LoRA Ecosystem
Massive EcosystemInherits full SD 1.5 LoRA ecosystem — 50,000+ LoRAs on CivitAI.
Approximately 50,000 LoRAs available on CivitAI. Each LoRA adds ~0.1 GB VRAM.
Browse all LoRAs on CivitAIRelated Workflows
You might also like
Frequently asked questions
FAQ — Realistic Vision v5.1 VRAM, Runtimes & Fit
How much VRAM does Realistic Vision v5.1 need?
Realistic Vision v5.1 (0.86B parameters) requires approximately 5.9 GB of VRAM at FP16 precision for standard 1024×1024 image generation. If you want a lighter setup, lower precisions like FP8 can reduce memory use when available.
Can I run Realistic Vision v5.1 on an 8GB GPU?
Realistic Vision v5.1 usually needs more than 8GB for comfortable local use. Check the VRAM table above for the exact resolution and precision trade-off.
Does Realistic Vision v5.1 work in ComfyUI and Automatic1111?
Realistic Vision v5.1 is marked for ComfyUI, Automatic1111, and Diffusers support in our catalog, so those are the runtimes we recommend first for local setup. If your workflow uses another front end, check the model's available formats and workflow notes above before downloading.
Can I run Realistic Vision v5.1 on RTX 4090?
Yes, the RTX 4090 (24 GB VRAM) can run Realistic Vision v5.1 comfortably at FP16. Expected generation time is around ~1s per image at 1024×1024.
Does Realistic Vision v5.1 support ControlNet?
Yes, Realistic Vision v5.1 has 3 ControlNet adapters available: Canny Edge (SD 1.5), Depth Map (SD 1.5), OpenPose (SD 1.5). Each ControlNet adds roughly 0.7 GB of extra VRAM.
Does Realistic Vision v5.1 have LoRA support?
Inherits full SD 1.5 LoRA ecosystem — 50,000+ LoRAs on CivitAI. The LoRA ecosystem for Realistic Vision v5.1 is rated as "massive". There are approximately 50,000 LoRAs available on Civitai. Each LoRA adds roughly 0.1 GB of extra VRAM.
How fast is Realistic Vision v5.1?
On a reference GPU (RTX 4090 24GB), Realistic Vision v5.1 generates a 1024×1024 image in approximately ~1s at FP16 with 28 inference steps. Faster GPUs with higher memory bandwidth will produce images more quickly.
About Realistic Vision v5.1
See also