// RUN โ€” FITS

Can the AMD Instinct MI300X 192GB run gpt-oss-120b?

Yes โ€” here's how fast and up to what context, with real measured numbers.

gpt-oss-120b on the AMD Instinct MI300X 192GB

QuantFits?Max contextSpeedBeyond context
FP16 no โ€” โ€” โ€”
Q8 yes 178k 28.6-34.9 t/s ~0.2-0.3 (slow)
Q4 yes 335k 51-62.4 t/s ~0.4-0.5 (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 MI300X 192GB run gpt-oss-120b?โ–ถ

Yes. At Q4 it generates ~51-62.4 tok/s and fits up to 335k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~0.4-0.5 tok/s.

How much context fits?โ–ถ

At Q4, up to about 335k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.