Quick answer
The Antminer S19 (Bitmain, 2020) delivers about 95 TH/s at roughly 3,250W, an efficiency near 34 J/TH on the 7nm BM1398 chip with 76 chips per hashboard. It is a reliable, well-supported secondary-market workhorse — viable on moderate power and a strong heater.
Verdict: the most durable of the legacy generations — good value used on reasonable power, but still a 240V, ~75 dB machine.
For the full canonical specification sheet, see our Antminer S19 specs guide. This review covers the practical picture: what the base S19 is, how it differs from the S19 Pro, and where it fits in 2026.
The Antminer S19 launched Bitmain’s S19 generation in 2020 and became one of the most widely deployed Bitcoin miners ever made. The base model sits below the S19 Pro on hashrate but shares the same reliable BM1398 platform, which is why so many are still hashing and why they are well supported on the repair and firmware side.
Antminer S19 specifications
- Hashrate: ~95 TH/s
- Power consumption: ~3,250W at the wall (stock)
- Efficiency: ~34 J/TH
- ASIC chip: BM1398, 7nm
- Chip count: 76 chips per hashboard (228 across three boards)
- Algorithm: SHA-256
- Cooling: dual fans
- Noise: ~75 dB
- Released: 2020
Architecture: S19 vs S19 Pro
The base S19 uses 76 BM1398 chips per hashboard, while the S19 Pro uses 114 per board — that chip-count difference is the main reason the Pro reaches ~110 TH/s versus the base model’s ~95 TH/s. 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 moved to simpler control boards (BeagleBone- and Amlogic-based) than the S17’s Zynq platform, which contributes to its reliability.
Efficiency and real-world performance
At ~34 J/TH the base S19 was a major step forward in 2020 and is still usable today, though a modern S21 is roughly twice as efficient per terahash. On moderate power the S19 can remain marginally viable; on cheap power it is genuinely useful, and its heat is substantial. Undervolting and underclocking with custom firmware are the standard way to push its efficiency further. Among the legacy generations the S19 is the one most likely to still earn rather than simply heat.
Power and home use
At ~3,250W the S19 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. A base S19 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 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 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 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-series hashboard is often cheaper than a new unit. See our transparent ASIC repair pricing for the numbers. We also list tested S19 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 specifications?
About 95 TH/s at roughly 3,250W (~34 J/TH), using the 7nm BM1398 chip with 76 chips per hashboard (228 total) on the SHA-256 algorithm. It was released by Bitmain in 2020.
What is the difference between the S19 and S19 Pro?
Both use the same 7nm BM1398 chip. The base S19 uses 76 chips per board for ~95 TH/s at ~34 J/TH; the S19 Pro uses 114 chips per board for ~110 TH/s at ~29.5 J/TH. The Pro is faster and more efficient.
Is the Antminer S19 still worth it in 2026?
It is the most viable of the legacy generations. On cheap power it can still earn, 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 is cheaper to buy used.
Can I run an Antminer S19 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.
