What GPU do I need to run facebook/sam3?

860M parameters, published in F32. View on Hugging FaceGated

Set up sam3
860M
Parameters
F32
Native precision
Sam3VideoModel
Architecture
mask-generation
Pipeline

sam3 is published by facebook on Hugging Face, with 2,241,669 downloads and 2,851 likes to date. It's a Sam3VideoModel model built for mask-generation, published natively in F32, and gated: you'll need to accept the model's terms on Hugging Face before downloading weights.

VRAM required & cheapest live GPU fit

Required VRAM = weight size at each precision, plus a fixed overhead for KV-cache, activations, and fragmentation. Full formula and assumptions: methodology.

Precision
Weight size
Required VRAM
Cheapest live fit
GPUs needed
Est. $/hr (full fit)
FP32
3.2 GB
3.8 GB
P4 (akash)
1
$0.032/hr
FP8 (quantized)
0.8 GB
1.0 GB
RTX 4080 (akash)
1
$0.158/hr
INT4 (quantized)
0.4 GB
0.5 GB
RTX 3070 (simplepod)
1
$0.050/hr

A GPU is only matched to a row if its hardware supports that precision, and the primary recommendation is always a single-GPU fit when one exists.

INT4 requires a quantized checkpoint actually published for this model, check its Hugging Face page before relying on this row.

Cheapest way to run sam3 at its published (F32) precision: 1× P4 on akash, at $0.032/hr per GPU ($0.032/hr total). Quantizing to FP8 or INT4 (rows above) can cost less, but requires a compatible quantized checkpoint to exist for this model.

Weight-to-VRAM math, the fit rules, and how live prices are normalized: full methodology.

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