Antminer S17 Pro Underclock
The honest answer to “S17 Pro underclock settings”: set the lowest watt target your hashrate goal tolerates — the floor is 960 W at 25.3 J/TH, and the curve rises steeply above it (47.5 J/TH flat out). The S17 Pro is legacy-generation: its firmware presets internally store a frequency (an extraction fact worth knowing, not a setting to chase). It is also one of the two bench-checked models in this dataset.
Quick answer
The Antminer S17 Pro tunes across a 960–3,800 W envelope (Normal mode: 38–80 TH/s). Best catalog efficiency is 25.3 J/TH, and the sweet spot — everything within 5% of it — spans 960–960 W. The floor is 960 W — 43% of the 2,212 W factory rating. There are no frequency/voltage settings to copy: you set a watt target and the firmware autotuner derives the rest for your unit. Status: Verified (measured).
Best efficiency sits at or near the envelope floor: the lowest watt target your hashrate goal tolerates is also the most efficient point in the catalog.
Antminer S17 Pro — Normal mode Verified (measured)
Floor fits a 120 V 15 A continuous-load budget (1,440 W). Budgets are the NEC 80% continuous-load rule; circuit fit only — stock Bitmain APW-series PSUs require 200–240 V input, so any 120 V build needs a PSU change regardless of watt target. At the floor this mode dissipates about 3,276 BTU/h (watts × 3.412).
Source: Firmware-extraction set, cross-checked on a D-Central repair-bench unit. Legacy S17-generation presets store a frequency internally (an extraction fact, not a guaranteed outcome); the envelope below publishes only the watt/hashrate bounds.
How to set a power target on this model
Aftermarket firmware exposes underclocking as a power target (sometimes "power limit" or a preset picker), not as frequency/voltage fields. Pick a watt figure inside the envelope above; the autotuner benchmarks your boards and settles onto it over a tuning period. Braiins OS+, VNish and LuxOS each expose this in their own UI, and DCENT_OS uses watt-target autotuning on its supported models; the undervolting guide walks through the firmware side step by step, and the firmware comparison covers which firmware supports which model. Verify the result at the wall with a meter — the target is an input, the wall draw is the fact.
- Braiins OS+ — set a power target →
- VNish — pick a preset →
- Stock firmware modes →
- LuxOS power targeting →
Frequency and voltage are calculated at runtime by the firmware autotuner — never fixed presets; per-unit silicon quality, ambient temperature and cooling shift real results.
These envelopes are derived aggregates (bounds, bands, counts) — the row-level operating points, the interactive picker and the CSV/JSON of the source data live in the ASIC Power Profiles Database, the single source dataset for every number on this page.
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Last reviewed August 13, 2026.