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

Written by Jakub Rusinowski · Last updated August 15, 2026

Yes. Cosmos 3 Edge needs 8.0 GB at BF16 and the AMD Radeon RX 7900 XT has 20 GB, leaving about 12 GB of headroom, at roughly 83 tok/s (estimated) with room for up to 64K of context.

The numbers

ModelCosmos 3 Edge
Parameters4B
QuantizationBF16
VRAM needed8.0 GB
AMD Radeon RX 7900 XT VRAM20 GB
VerdictRuns
Max context64K
Estimated speed~83 tok/s

What to do next

Nothing to change — run it at BF16. If you want more capability, check whether the next size up also fits.

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Running Cosmos 3 Edge on this card:

AMD Radeon RX 7900 XT 20GB
20 GB VRAM · 315 W board power
2026 prices are volatile — check the current listing.
Check price on Amazon

Buy vs. rent Cosmos 3 Edge
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.

Other Cosmos 3 sizes on the AMD Radeon RX 7900 XT

Cosmos 3 Edge on nearby hardware

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