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// RUN — FITS
Can the AMD Radeon RX 7900 XTX run Gemma 3 QAT 12B?
Yes — here's how fast and up to what context, with real measured numbers.
Gemma 3 QAT 12B on the AMD Radeon RX 7900 XTX
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | no | — | — | — |
| Q8 | yes | 52k | 50.4-61.6 t/s | ~2.1-2.6 (slow) |
| Q4 | yes | 85k | 90-110 t/s | ~3.8-4.6 (slow) |
Estimate (memory-bound). Beyond "max context" the KV cache spills to system RAM offload (depends on your system RAM) and speed drops to the "beyond" figure.
FAQ
Can the AMD Radeon RX 7900 XTX run Gemma 3 QAT 12B?▶
Yes. At Q4 it generates ~90-110 tok/s and fits up to 85k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~3.8-4.6 tok/s.
How much context fits?▶
At Q4, up to about 85k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.