What is the best Stable Diffusion 3 (SD3) quantization for a 4GB GPU?

The Q4_K_M GGUF variant (~3.5GB) is the best fit on the NVIDIA GeForce GTX 1650.

GPU × Model Compatibility

Can a NVIDIA GeForce GTX 1650 run Stable Diffusion 3 (SD3)?

Q: Can a NVIDIA GeForce GTX 1650 run Stable Diffusion 3 (SD3) locally?

Yes — the NVIDIA GeForce GTX 1650 has 4GB VRAM. It can run Stable Diffusion 3 (SD3) with a smaller quantization or offloading (best variant: Q4_K_M GGUF, ~3.5GB).

NVIDIA GeForce GTX 1650 has 4GB VRAM. Here's exactly whichquantization (FP16, FP8, GGUF)of Stable Diffusion 3 (SD3) fits and how smoothly it runs.

Runs with trade-offs

The NVIDIA GeForce GTX 1650 can run Stable Diffusion 3 (SD3), but you'll need to use the Q4_K_M GGUF variant (~3.5GB) and may need to offload parts of the model.

3.5GB

smallest fit on this GPU

Run it locally

NVIDIA GeForce GTX 1650 (4GB) · ~$149 is a solid fit for Stable Diffusion 3 (SD3).

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Stable Diffusion 3 (SD3) variants on the NVIDIA GeForce GTX 1650

Variant	Precision	Size	Total VRAM needed	Headroom	Fits?
Q4_K_M GGUF	GGUF Q4_K_M	3.5GB	5.5GB	-1.5GB	⚠ Tight	Download ↗
FP8 (Optimized)REC	FP8	4.1GB	6.1GB	-2.1GB	✗ OOM	Download ↗
FP16 (Standard)	FP16	8.1GB	10.1GB	-6.1GB	✗ OOM	Download ↗

"Total VRAM needed" = variant size + 2.0GB estimated text-encoder/VAE overhead. Headroom = GPU VRAM (4GB) − total needed. Green ≥ 1.5GB headroom; Red ≤ −2GB (will OOM).

NVIDIA GeForce GTX 1650 at a glance

VRAM

4GB

Est. price

$149

Best for

8.1GB Stable Diffusion 3 (SD3) and lighter

Can a NVIDIA GeForce GTX 1650 run Stable Diffusion 3 (SD3)?

Runs with trade-offs

Run it locally

Stable Diffusion 3 (SD3) variants on the NVIDIA GeForce GTX 1650

NVIDIA GeForce GTX 1650 at a glance

Other models on the NVIDIA GeForce GTX 1650

Other GPUs for Stable Diffusion 3 (SD3)