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// RUN — FITS
Can the AMD Instinct MI455X run ByT5-XXL?
Yes — here's how fast and up to what context, with real measured numbers.
ByT5-XXL on the AMD Instinct MI455X
| Quant | Fits? | Max context | Speed | Beyond context |
|---|---|---|---|---|
| FP16 | yes | 2259k | 478.6-585 t/s | ~1-1.2 (slow) |
| Q8 | yes | 2338k | 957.2-1169.9 t/s | ~2-2.4 (slow) |
| Q4 | yes | 2373k | 1709.3-2089.1 t/s | ~3.5-4.3 (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 MI455X run ByT5-XXL?▶
Yes. At Q4 it generates ~1709.3-2089.1 tok/s and fits up to 2373k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~3.5-4.3 tok/s.
How much context fits?▶
At Q4, up to about 2373k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.