Can I Run Cosmos 3 on NVIDIA GeForce RTX 4080?

Written by Jakub Rusinowski · Last updated July 21, 2026

Yes, comfortably — you'll have ~8 GB of headroom running Cosmos 3 Edge at BF16 (8 GB, ~112 tok/s (est.)).

Buy This HardwareNVIDIA GeForce RTX 4080 16GB — 16 GB VRAM · 320 W board powerDeploy in the Cloud NowRTX 4090 on RunPod — from $0.34/hr · rate checked 2026-07

or compare on Vast.ai from $0.35/hr (typical low · varies)

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NVIDIA GeForce RTX 4080 16GB
16 GB VRAM · 320 W board power
2026 prices are volatile — check the current listing.
Check price on Amazon

NVIDIA GeForce RTX 4080 Specs

VRAM16 GB
Memory Bandwidth717 GB/s

Cosmos 3 Edge on the NVIDIA GeForce RTX 4080: VRAM by quantization

QuantVRAM neededFits 16 GB?Max context
F169.3 GB✓ Yes16K
Q8_05.5 GB✓ Yes16K
Q6_K4.5 GB✓ Yes16K
Q5_K_M4.1 GB✓ Yes16K
Q4_K_M3.7 GB✓ Yes16K
Q3_K_M3 GB✓ Yes16K
Q2_K2.6 GB✓ Yes16K

VRAM needed assumes a 4K-token context with an f16 KV cache; “Max context” is the largest window that still fits in 16 GB. Figures are estimates from parameter count, quantization and memory bandwidth — the analyzer lets you tune KV-cache quant and context.

Cosmos 3 Sizes That Fit the NVIDIA GeForce RTX 4080

Cosmos 3 EdgeBF16 · 8 GB · ~112 tok/s (est.)
Buy vs. rent Cosmos 3
Buy the GPU
~$1,199
NVIDIA GeForce RTX 4080 · MSRP
Rent by the hour
from $0.34/hr
RTX 4090 (24 GB) class

At 2 hrs/day, buying (~$1,199) beats renting at $0.34/hr after about 4.9 years.

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RunPod $0.34/hr
Rent on RunPod →
Vast.ai $0.35/hr · typical low · varies
Rent on Vast.ai →

Cloud rates verified 2026-07 — estimates, and marketplace prices vary. Buying price is GPU MSRP only, not a full PC.

FAQ

Is the NVIDIA GeForce RTX 4080 enough to run Cosmos 3 locally?

Yes, comfortably — you'll have ~8 GB of headroom running Cosmos 3 Edge at BF16 (8 GB, ~112 tok/s (est.)).

What's the best Cosmos 3 size for the NVIDIA GeForce RTX 4080?

Cosmos 3 Edge at BF16 quantization (8 GB), estimated ~112 tokens/sec.

Every Cosmos 3 size on the NVIDIA GeForce RTX 4080

SizeVRAMVerdictSpeed
Cosmos 3 Super128.0 GBDoes not fit
Cosmos 3 Nano32.0 GBRuns at Q5_K_M
Cosmos 3 Edge8.0 GBRuns~112 tok/s

Cosmos 3 on Other GPUs

Popular Models on the NVIDIA GeForce RTX 4080

VRAM Tier

Troubleshooting

Buying Guide

← Can I Run It? | Cosmos 3 Model Page | NVIDIA GeForce RTX 4080 GPU Page | Check Your Hardware