Q: How fast is qwen3 30B-A3B MoE on the AMD Radeon RX 6900 XT?

~120–200 tok/s (active-expert estimate) on the AMD Radeon RX 6900 XT. computed roofline: 512 GB/s × 0.45–0.72 efficiency window / 1.9GB (Q4_K_M) — bands, never points. MoE: file is 18.6GB (that decides fit) but only ~3B of experts activate per token (~1.9GB streamed) — band below is the active-expert estimate, optimistic; community MoE rows run several× the naive bandwidth math

Question 1

Can the AMD Radeon RX 6900 XT run qwen3 30B-A3B MoE?

Accepted Answer

qwen3 30B-A3B MoE needs about 18.98GB working set (weights 18.6GB + KV cache 0.38GB at 4k context). The AMD Radeon RX 6900 XT offers ~16GB usable — verdict: offload-partial. 19.0 GB vs 16 GB usable — partial CPU offload, expect large speed loss

Question 2

How fast is qwen3 30B-A3B MoE on the AMD Radeon RX 6900 XT?

Accepted Answer

~120–200 tok/s (active-expert estimate)

computed roofline: 512 GB/s × 0.45–0.72 efficiency window / 1.9GB (Q4_K_M) — bands, never points.

MoE: file is 18.6GB (that decides fit) but only ~3B of experts activate per token (~1.9GB streamed) — band below is the active-expert estimate, optimistic; community MoE rows run several× the naive bandwidth math

Question 3

What should I run qwen3 30B-A3B MoE on instead?

Accepted Answer

Mac mini M4 (32GB) runs it fully ($999).

Can the AMD Radeon RX 6900 XT run qwen3 30B-A3B MoE?

Run qwen3 30B-A3B MoE on instead