// RUN โ€” FITS

Can the AMD Radeon Pro W7900 48GB run Stable Diffusion 3.5 Large?

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

Stable Diffusion 3.5 Large on the AMD Radeon Pro W7900 48GB

QuantFits?Max contextSpeedBeyond context
FP16 yes 202k 33.6-41.1 t/s ~1.6-1.9 (slow)
Q8 yes 264k 67.2-82.1 t/s ~3.1-3.8 (slow)
Q4 yes 291k 120-146.7 t/s ~5.6-6.8 (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 Pro W7900 48GB run Stable Diffusion 3.5 Large?โ–ถ

Yes. At Q4 it generates ~120-146.7 tok/s and fits up to 291k context; beyond that it spills to system RAM offload (depends on your system RAM) and slows to ~5.6-6.8 tok/s.

How much context fits?โ–ถ

At Q4, up to about 291k tokens stay in fast memory; longer context spills to system RAM offload (depends on your system RAM) and throughput collapses.