**DeepSeek-V4-Flash-0731 on 4x Radeon AI PRO R9700 with affinity: the "refused" 4-card config works, ~79 tok/s on real cards**

Key points

• Nobody had tried it on four real R9700s.1
• 4 cards: 79 tok/s greedy, 63 at temp 1.0, about 90 on a chat answer with thinking on.1
• The engine's own cross-rank check (it compares the cards against each other every few samples) passed every time.1
• So the bug the author hit lives in the 4-on-2 simulation, not in 4-rank execution. u/neuromacmd already suspected this.1

Sources (1)

• [1]**DeepSeek-V4-Flash-0731 on 4x Radeon AI PRO R9700 with affinity: the "refused" 4-card config works, ~79 tok/s on real cards**
  r/LocalLLaMA (top, daily) · Oct 15, 11:06 PM

  Setup: Threadripper PRO 9955WX, 128 GB RAM, four R9700s all on CPU lanes with P2P between every pair.

  Nobody had tried it on four real R9700s.

Extractive summary: sentences quoted from the sources.