Developer raises RTX PRO 4000 SFF power limit to 120W via modified VBIOS to test Qwen
10/26/2026 — 10/26, 06:16·1 sources (all)·1 reports (all)
Key takeaways
- A developer loaded a modified VBIOS on an RTX PRO 4000 Blackwell SFF card, lifting its 70W power cap to 120W, then ran 158 benchmark request…
Background & analysis
On October 26, 2026, a developer posted results to Reddit's LocalLLaMA community describing an experiment on a single RTX PRO 4000 Blackwell SFF card: 24 GB GDDR7, a factory power limit of 70 W, and no auxiliary power connector. Using a loader built by u/panchovix together with patched NVIDIA open kernel modules, the developer loaded a modified VBIOS into memory and raised the power limit to 120 W, then experimented with memory and core offsets. No EEPROM flashing or soldering was involved.
Across 158 benchmark requests, the developer tested Qwen3.8 27B with DFlash2 and Qwen3.6 35B A3B, comparing how each model performed under different power levels. The report notes that what stood out was how differently the two models answered the underlying question of whether more power actually helps. The excerpt available cuts off before the specific measurements and conclusions are presented, so the detailed findings cannot be verified from this material alone.
AI-generated from 1 reports · updated 22 hours ago
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A developer modified the VBIOS on an RTX PRO 4000 Blackwell SFF GPU to raise the power limit from 70W to 120W without soldering, testing Qwen3.8 27B and Qwen3.6 35B A3B models across 158 benchmark requests to evaluate performance scaling under higher power.
Reddit · LocalLLaMAAI score 59
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