The Bitmain Antminer S19 Pro was the flagship of the original S19 generation and one of the defining miners of the 2020-2023 Bitcoin mining era. At 110 TH/s and 29.5 J/TH, the S19 Pro powered massive mining operations worldwide and played a central role in the post-halving hashrate expansion. Built on the BM1398 ASIC chip, it set the performance standard for its generation.
While the S19 Pro has been surpassed by newer, more efficient hardware, it remains widely deployed and actively traded on the secondary market. For operators with access to very cheap electricity or those using miners as dual-purpose space heaters, the S19 Pro’s extremely low acquisition cost in 2026 can still make economic sense.
Antminer S19 Pro Full Specifications
| Specification | Details |
|---|---|
| Manufacturer | Bitmain |
| Model | Antminer S19 Pro |
| Algorithm | SHA-256 |
| Hashrate | 110 TH/s |
| Power Consumption | 3,250W (±5%) |
| Efficiency | 29.5 J/TH |
| Noise Level | 75 dB |
| Weight | 13.2 kg |
| Dimensions | 400 x 195 x 290 mm |
| Operating Temperature | 5-40 °C |
| Cooling | 4 x high-speed fans (air-cooled) |
| ASIC Chip | BM1398 |
| Chip Count | ~342 |
| Input Voltage | 200-240V AC |
| Network Connection | Ethernet (RJ45) |
| Release Date | 2020 |
Performance Analysis
The S19 Pro’s 29.5 J/TH efficiency was competitive when it launched but now sits near the bottom of viable mining hardware. It matches the S19j Pro in efficiency (both at 29.5 J/TH) but offers slightly higher hashrate (110 vs. 104 TH/s) at a slightly higher power draw (3,250W vs. 3,068W).
The efficiency gap to newer hardware is significant: the S19k Pro (23 J/TH) is 22% more efficient, the S19 XP (21.5 J/TH) is 27% better, and the Antminer S21 (17.5 J/TH) is 41% more efficient while delivering nearly double the hashrate. Against MicroBT’s lineup, even the M50S at 26 J/TH is 12% more efficient.
At 2026 network difficulty levels, the S19 Pro requires very cheap electricity (sub-$0.05/kWh) to generate positive mining returns on electricity cost alone. However, when factored as a heating device that also mines Bitcoin, the economics shift considerably.
For a full ranking of miners by efficiency, see our Most Efficient Bitcoin Miners 2026 guide.
Profitability Snapshot
Estimated daily revenue and cost at current network difficulty (approximate, based on typical 2026 conditions). Actual results depend on Bitcoin price, network difficulty, and pool fees.
| Electricity Rate | Daily Power Cost | Monthly Power Cost | Viability |
|---|---|---|---|
| $0.05/kWh | $3.90 | $117 | Marginal — may be profitable depending on BTC price and difficulty |
| $0.08/kWh | $6.24 | $187 | Likely unprofitable — power cost approaching or exceeding mining revenue |
| $0.10/kWh | $7.80 | $234 | Unprofitable — mining revenue does not cover electricity |
| $0.12/kWh | $9.36 | $281 | Unprofitable — only viable as a space heater that also mines Bitcoin |
Use our Bitcoin Mining Profitability Calculator for real-time estimates with your exact electricity rate, or check our Bitcoin Mining Electricity Cost by State & Province guide to find your local rate.
Best Use Cases
Bitcoin Space Heater: This is the S19 Pro’s strongest use case in 2026. At 3,250W, it outputs approximately 11,089 BTU/h of heat — enough to warm a large room or small apartment. D-Central pioneered the Bitcoin space heater concept with the Antminer S19 Space Heater Edition. When you would be running an electric heater anyway, the S19 Pro provides equivalent heating PLUS Bitcoin mining revenue. The electricity cost is a heating expense, not a mining expense. See our Bitcoin Space Heater vs Electric Heater comparison.
Ultra-Cheap Power Operations: At sub-$0.03/kWh electricity (stranded gas, flare gas, behind-the-meter solar/hydro), the S19 Pro’s rock-bottom acquisition cost on the used market makes it one of the highest-ROI options available. The machine may cost under $500, and every sat mined at near-free electricity is pure profit.
Home Heating Integration: Canadian miners can duct the S19 Pro’s exhaust heat into their home using D-Central cooling shrouds. During winter months (October through April in most of Canada), the mining revenue effectively subsidizes your heating bill. D-Central’s custom hashboard airflow dividers allow running fewer hashboards for quieter, lower-power operation.
Mining Education and Experimentation: The S19 Pro’s massive installed base, extensive documentation, and robust firmware support make it ideal for learning ASIC mining. Buy one cheaply, learn firmware installation, understand thermal management, practice basic repairs, then decide whether to invest in newer hardware.
Parts Donor: Working S19 Pro units can serve as parts donors for other S19-series machines. BM1398 chips, fans, connectors, and heatsinks are interchangeable across much of the S19 lineup.
Compatible Firmware
| Firmware | Compatibility | Key Features |
|---|---|---|
| Stock (Bitmain) | Full support | Default firmware, basic configuration |
| Braiins OS+ | Fully supported | Autotuning, Stratum V2, power capping — essential for extending profitability |
| Vnish | Fully supported | Advanced overclocking, custom profiles, immersion mode, underclocking |
| LuxOS | Fully supported | Curtailment features, fleet management, API access |
Third-party firmware is particularly valuable on the S19 Pro. Running Braiins OS+ with autotuning and power capping (e.g., limiting to 2,000W) can improve effective J/TH by allowing the firmware to optimize the power-hashrate curve. This can extend the S19 Pro’s profitable lifespan significantly.
For detailed installation instructions, see our guides:
- Antminer Firmware Compatibility Matrix 2026
- Braiins OS+ Setup & Configuration Guide
- Vnish Firmware Guide
- LuxOS Firmware Guide
- Antminer Firmware Update Guide
Common Issues & Repair
Common issues with the Antminer S19 Pro include:
- Hashboard failures: After years of continuous operation, BM1398 chip failures are increasingly common. D-Central stocks BM1398 replacement chips and replacement S19 Pro hashboards.
- Thermal paste degradation: Original thermal paste dries out after 2-3 years, causing elevated chip temperatures and throttling. Re-pasting all chips with quality thermal compound restores performance.
- Fan bearing wear: Continuous 24/7 operation wears fan bearings, leading to vibration, noise, and eventually failure. Compatible replacement fans are available.
- Control board issues: Power events and firmware corruption can damage the control board. Replacement C52 control boards with pre-installed Braiins OS are available.
- PSU degradation: The APW12 power supply degrades over time, especially in hot or dusty environments. Capacitor aging causes voltage droop and erratic behavior.
D-Central offers professional Antminer S19/S19 Pro Repair services from our Canadian workshop. The S19 Pro is one of our most commonly repaired platforms — our technicians have deep expertise with every component. See our ASIC Repair Cost Estimator for pricing.
Where to Buy
D-Central stocks the Antminer S19 Pro (new and refurbished) and ships across Canada and internationally. Buy the Antminer S19 Pro from D-Central — or check out our S19 Space Heater Edition for a pre-configured dual-purpose mining heater. We also carry BM1398 chips, replacement hashboards, control boards, and cooling accessories.