Can I Run Cosmos 3 on AMD Radeon RX 7900 XT?

Autor: Jakub Rusinowski · Ostatnia aktualizacja: 21 lipca 2026

Yes, comfortably — you'll have ~12 GB of headroom running Cosmos 3 Edge at BF16 (8 GB, ~83 tok/s (est.)).

Buy This HardwareAMD Radeon RX 7900 XT 20GB — 20 GB VRAM · 315 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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AMD Radeon RX 7900 XT 20GB
20 GB VRAM · 315 W board power
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AMD Radeon RX 7900 XT Specs

VRAM20 GB
Memory Bandwidth800 GB/s

Cosmos 3 Edge on the AMD Radeon RX 7900 XT: VRAM by quantization

QuantVRAM neededFits 20 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 20 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 AMD Radeon RX 7900 XT

Cosmos 3 EdgeBF16 · 8 GB · ~83 tok/s (est.)
Buy vs. rent Cosmos 3
Buy the GPU
~$899
AMD Radeon RX 7900 XT · MSRP
Rent by the hour
from $0.34/hr
RTX 4090 (24 GB) class

At 2 hrs/day, buying (~$899) beats renting at $0.34/hr after about 3.7 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

Can I run Cosmos 3 on the AMD Radeon RX 7900 XT?

Yes, comfortably — you'll have ~12 GB of headroom running Cosmos 3 Edge at BF16 (8 GB, ~83 tok/s (est.)).

What's the best Cosmos 3 size for the AMD Radeon RX 7900 XT?

Cosmos 3 Edge at BF16 quantization (8 GB), estimated ~83 tokens/sec.

Every Cosmos 3 size on the AMD Radeon RX 7900 XT

SizeVRAMVerdictSpeed
Cosmos 3 Super128.0 GBDoes not fit
Cosmos 3 Nano32.0 GBRuns at Q6_K
Cosmos 3 Edge8.0 GBRuns~83 tok/s

Cosmos 3 on Other GPUs

Popular Models on the AMD Radeon RX 7900 XT

VRAM Tier

Troubleshooting

Buying Guide

← Can I Run It? | Cosmos 3 Model Page | AMD Radeon RX 7900 XT GPU Page | Check Your Hardware