Qwen3.8 27B
on NVIDIA RTX Pro 4000 Blackwell SFF · 8,000 ctx
Summary
User reports Qwen3.8 27B at 58.53 tok/s on an RTX PRO 4000 Blackwell SFF, up from 35.04 tok/s with DFlash2 speculation after power and clock tuning.
Setup is NVFP4 weights at 8,000 input tokens with ECC off, best at a 120 W limit, VRAM +20% and core +180 MHz; the baseline was 70 W with zero offsets.
A second model, Qwen3.6 35B A3B in Q4_K_S with no drafter, went from 84.97 to 115.56 tok/s at 120 W, VRAM +33.3% and core offset 0. The user notes 120 W exceeds the 75 W PCIe slot budget on this connectorless card and calls it an experiment, not a recommended daily profile.