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// RUN — FITS
Can the AMD Radeon RX 7900 XTX run ERNIE-4.5-21B-A3B?
Yes — here's how fast and up to what context, with real measured numbers.
ERNIE-4.5-21B-A3B on the AMD Radeon RX 7900 XTX
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | no | — | — | — |
| Q8 | no | — | — | — |
| Q4 | yes | 34k | 51.4-62.9 t/s | ~2.1-2.6 (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 ERNIE-4.5-21B-A3B?▶
Yes. At Q4 it generates ~51.4-62.9 tok/s and fits up to 34k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~2.1-2.6 tok/s.
How much context fits?▶
At Q4, up to about 34k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.