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

Name: LLM Configurator — GPU VRAM Checker
Author: LLM Configurator

Autor: Jakub Rusinowski · Ostatnia aktualizacja: 11 września 2026

Not at BF16 — that needs 32.0 GB and the AMD Radeon RX 7900 XT has 20 GB. Drop to Q6_K and it fits in 15.4 GB, with up to 16K of context.

The numbers

Model	Cosmos 3 Nano
Parameters	16B
Quantization	BF16
VRAM needed	32.0 GB
AMD Radeon RX 7900 XT VRAM	20 GB
Verdict	Runs at a lower quant
Fits at	Q6_K (15.4 GB)
Max context	16K

What to do next

Quantize to Q6_K. That is the cheapest fix — it costs some quality but no money.

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Running Cosmos 3 Nano on this card:

AMD Radeon RX 7900 XT 20GB

20 GB VRAM · 315 W board power

Ceny w 2026 są niestabilne — sprawdź aktualną ofertę.

Sprawdź cenę na Amazon

Won't fit — rent Cosmos 3 Nano instead

Cosmos 3 Nano needs ~32 GB but this GPU has 20 GB. Rent a A100 (40 GB)-class GPU by the hour instead of buying one:

Affiliate links — we may earn a commission if you sign up, at no extra cost to you.

Vast.ai $0.55/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.

Other Cosmos 3 sizes on the AMD Radeon RX 7900 XT

Cosmos 3 Super — does not fit (128.0 GB)
Cosmos 3 Edge — runs (8.0 GB)

Cosmos 3 Nano on nearby hardware

Apple M1 (16 GB) — runs at a lower quant
NVIDIA RTX 6000 Ada Generation (48 GB) — runs

All Cosmos 3 sizes on the AMD Radeon RX 7900 XT | VRAM calculator for Cosmos 3 Nano | AMD Radeon RX 7900 XT GPU page | Check your hardware