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// RUN — FITS
Can the AMD Instinct MI325X 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 Instinct MI325X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 732k | 90-110 t/s | ~0.6-0.7 (slow) |
| Q8 | yes | 813k | 180-220 t/s | ~1.2-1.5 (slow) |
| Q4 | yes | 848k | 321.4-392.9 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 Instinct MI325X run ERNIE-4.5-21B-A3B?▶
Yes. At Q4 it generates ~321.4-392.9 tok/s and fits up to 848k 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 848k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.