Maximum Efficiency: Antminer T19 Specs

The Antminer T19 is the value member of Bitmain’s 2020 S19 generation — same 7nm BM1398 chip, configured for a lower unit cost than the S19 and S19 Pro. It delivers about 84 TH/s at roughly 3,150 W, for an efficiency near 37.5 J/TH. Like the rest of the S19 line it is now well past the efficiency frontier, but it remains a common, repairable workhorse on cheap power. This guide gives the real specs and internals, written from D-Central’s bench experience servicing the S19 family.

Antminer T19 specifications, explained

Hash rate and efficiency

The T19 hashes at about 84 TH/s while drawing roughly 3,150 W, for an efficiency near 37.5 J/TH. It sits between the S19 (~34 J/TH) and the older S17 generation: a little less efficient than the S19, but cheaper to buy. By 2026 standards 37.5 J/TH is high, so the T19 earns its keep only on genuinely cheap or free power, or when its heat output is useful.

Chip and hash-board architecture

The T19 uses the same 7nm BM1398 as the S19 and S19 Pro, across three hash boards. As on the rest of the S19 family, the chips are grouped into series-wired voltage domains, and each domain is regulated as a unit. Voltage is controlled per domain, not per individual chip — a single failed chip pulls down its whole domain and silences the chain. This is the key fact for diagnosing a dead T19 board.

Power and noise

The T19 expects 200–240 V AC and is not a 120 V machine in stock form. Two high-static-pressure fans pull air across the heatsinks; like every full-size Antminer it is loud and belongs in a shed, garage, or dedicated space. Clean filters and good airflow are the cheapest insurance against the chip and domain failures above.

Custom firmware on the Antminer T19

The T19 is a common target for third-party firmware. Custom firmware does not change the silicon — it changes how the control board drives it. The headline feature across the firmware ecosystem is autotuning: instead of running every chip at one factory frequency, the firmware finds an efficient operating point and applies it per voltage domain, not per individual chip. Because T19 chips share regulated domains, frequency and voltage are tuned at the domain level, and the values are calculated live from each board’s measured behaviour rather than loaded as fixed presets.

Used carefully, autotuning lets an operator trade hashrate for efficiency or push for more hashrate within thermal and electrical limits. This category exists because of the people who built it in the open — Braiins pioneered ASIC autotuning and the Stratum V2 protocol, and a broader community of firmware and tooling authors carried it forward. Our firmware comparison lays out the trade-offs — dev fees, features, and what each project actually open-sources.

D-Central’s own contribution to that lineage is DCENT_OS, a GPL-3.0 open-source Antminer firmware we are building in the open. It is in closed beta today, with a public beta targeted for summer 2026 — experimental, not production-ready. You can join the DCENT_OS waitlist to follow or test it. We stand on the shoulders of the people who opened this space first.

Owning and repairing a T19

We have repaired and refurbished S19-family Antminers — the T19 included — on our Laval bench since the line launched. The BM1398 platform is mature and very serviceable: chip-level and domain-level board repair is routine, and parts are abundant. When a board drops a chain or a unit stops hashing, we publish transparent flat-rate ASIC repair pricing instead of the opaque return-for-repair loop the manufacturers run, and we will tell you honestly when an older T19 is better repaired than replaced. Tested, warrantied refurbished units appear in our shop as they clear the bench.

FAQ

What is the Antminer T19’s hashrate and power consumption?

The Antminer T19 produces about 84 TH/s while drawing roughly 3,150 W, for an efficiency of about 37.5 J/TH.

What chip does the Antminer T19 use?

The T19 uses Bitmain’s 7nm BM1398 ASIC — the same chip as the S19 and S19 Pro — across three hash boards.

How is the T19 different from the S19?

The T-series is the value variant. The T19 uses the same BM1398 generation as the S19 but is configured for a lower unit cost, which is why it runs at about 37.5 J/TH versus the S19’s ~34 J/TH.

Can the Antminer T19 run custom firmware?

Yes. The T19 is a common target for third-party firmware. Autotuning firmware adjusts frequency and voltage per voltage domain at runtime to trade hashrate for efficiency. D-Central is also building DCENT_OS, an open-source (GPL-3.0) firmware currently in closed beta.

Is the Antminer T19 worth running in 2026?

At about 37.5 J/TH the T19 only makes economic sense on very cheap, free, or curtailed power, or when its heat is being used. It stays popular because used units are inexpensive, abundant, and easy to repair.