Quick answer
The Antminer S19 Pro (Bitmain, 2020) delivers about 110 TH/s at roughly 3,250W, an efficiency near 29.5 J/TH on the 7nm BM1398 chip with 114 chips per hashboard. It is the strongest of the S19 family and the most viable legacy miner on moderate power.
Verdict: the pick of the legacy generations — reliable, well-supported, and still earning on reasonable power, but a 240V, ~75 dB machine.
For the full canonical specification sheet, see our Antminer S19 Pro specs guide. This review covers the practical picture: what the S19 Pro is, how it differs from the base S19, and where it fits in 2026.
The Antminer S19 Pro was the flagship of Bitmain’s S19 generation when it launched in 2020, and it remains one of the most sought-after secondary-market miners. It shares the reliable BM1398 platform with the base S19 but packs more chips per board for higher hashrate and better efficiency — which is why, of all the legacy generations, it is the one most likely to still pay its way.
Antminer S19 Pro specifications
- Hashrate: ~110 TH/s (a ~100 TH/s bin also shipped)
- Power consumption: ~3,250W at the wall (stock)
- Efficiency: ~29.5 J/TH
- ASIC chip: BM1398, 7nm
- Chip count: 114 chips per hashboard (342 across three boards)
- Algorithm: SHA-256
- Cooling: four fans
- Noise: ~75 dB
- Released: 2020
Architecture: S19 Pro vs S19
The S19 Pro uses 114 BM1398 chips per hashboard, versus 76 per board on the base S19 — that extra silicon is what takes it to ~110 TH/s at ~29.5 J/TH, comfortably ahead of the base model’s ~95 TH/s at ~34 J/TH. Both run the same 7nm BM1398 chip, whose register map is nearly identical to the S17’s BM1397. Voltage is regulated per power domain on each board, not per individual chip. The S19 generation’s simpler control boards are a big part of why these units have aged so well.
Efficiency and real-world performance
At ~29.5 J/TH the S19 Pro was a landmark in 2020 and is still respectable today, though a modern S21 is roughly twice as efficient per terahash. On moderate power it can remain viable, and on cheap power it is genuinely productive; its heat output is substantial. Undervolting and underclocking with custom firmware can push efficiency further still. Among legacy hardware, the S19 Pro offers the best balance of purchase price, reliability, and running cost.
Power and home use
At ~3,250W the S19 Pro needs a dedicated 240V circuit — the class of outlet used for a dryer or EV charger — not a standard 120V household receptacle. At ~75 dB it is loud, suited to a garage, dedicated room, or ventilated hashcenter. For quiet Bitcoin mining at home on a normal outlet, the Bitaxe is the right tool. An S19 Pro is also a powerful ~3.2kW heater that mines while it warms a space.
Firmware and tuning
Custom firmware lets you undervolt and autotune an S19 Pro for better efficiency. The ecosystem stands on the shoulders of those who built it first — Braiins pioneered ASIC autotuning and native Stratum V2, Luxor brought fast curtailment and hashprice-aware controls, and the community reverse-engineered the BM1398. Autotuners calculate frequency and voltage per domain at runtime; they are not fixed presets. Compare the options in our firmware comparison. D-Central is also building DCENT_OS, our own GPL-3.0 firmware — closed beta now, public beta targeted for summer 2026, experimental and waitlist-only.
Buying, refurb, and repair
D-Central has run a Bitcoin mining repair bench since 2016, and the S19 Pro is one of the most serviceable modern Antminers. Failures usually isolate to a single hashboard or the control board; both are repairable, and a replacement S19 Pro hashboard is often cheaper than a new unit. See our transparent ASIC repair pricing for the numbers, and tested S19 Pro units. Refurbished hardware carries D-Central’s own warranty; new units carry the manufacturer’s; returns are DOA/defect-only. We build to order, so lead times are estimates, not promises.
FAQ
What are the Antminer S19 Pro specifications?
About 110 TH/s at roughly 3,250W (~29.5 J/TH), using the 7nm BM1398 chip with 114 chips per hashboard (342 total) on the SHA-256 algorithm. It was released by Bitmain in 2020.
What is the difference between the S19 Pro and the S19?
Both use the same 7nm BM1398 chip. The S19 Pro uses 114 chips per board for ~110 TH/s at ~29.5 J/TH; the base S19 uses 76 chips per board for ~95 TH/s at ~34 J/TH. The Pro is faster and more efficient.
Is the Antminer S19 Pro still worth it in 2026?
It is the most viable legacy miner. On cheap power it is genuinely productive, and on moderate power it can approach break-even, especially if the heat is useful. A modern S21 is far more efficient, but the S19 Pro is much cheaper to buy used.
Can I run an Antminer S19 Pro at home?
It needs a dedicated 240V circuit and is loud at ~75 dB, so it belongs in a garage, dedicated room, or ventilated hashcenter. For quiet home Bitcoin mining on a normal outlet, a Bitaxe is the better fit.
Last reviewed and fact-checked: June 2026 — D-Central. Specifications cross-checked against manufacturer data and our own repair-bench experience.
