The Bitmain Antminer S19 launched in May 2020 as the foundation of what would become the most successful ASIC miner generation in Bitcoin history. Built on the 7nm BM1398 chip, the S19 delivered 95 TH/s at 3,250W — achieving an efficiency of 34.2 J/TH that represented a significant leap over the S17 generation. The S19 platform would go on to spawn an extensive family of variants including the S19 Pro, S19j, S19a, T19, S19j Pro, S19 XP, and S19k Pro.
The S19 introduced the chassis design that Bitmain would refine through the S21 generation: a rectangular enclosure with 4 cooling fans, integrated APW12 power supply, and 3 hashboards containing 76 BM1398 chips each. This design proved remarkably reliable compared to the S17 generation, earning the S19 a reputation as a workhorse miner that could run for years with minimal maintenance.
In 2026, the S19 remains a viable miner at competitive electricity rates. While the S21 has taken over as the flagship, the S19 is available at a fraction of the cost on the secondary market and continues to produce meaningful hashrate. Its 3,250W heat output (~11,089 BTU/h) also makes it one of the most popular candidates for space heater conversions in cold climates. D-Central Technologies provides full repair, parts, and space heater conversion services for the entire S19 family.
Antminer S19 Full Specifications
| Specification | Details |
|---|---|
| Manufacturer | Bitmain |
| Model | Antminer S19 |
| Release Date | May 2020 |
| Algorithm | SHA-256 |
| Hashrate | 95 TH/s (±5%) |
| Power Consumption | 3,250W (±5%) |
| Efficiency | 34.2 J/TH |
| Input Voltage | 200–277V AC |
| Dimensions | 400 × 195 × 290 mm |
| Weight | 14.5 kg |
| Noise Level | ~75 dB |
| Operating Temperature | 5–40°C |
| Humidity | 5–95% |
| Cooling | 4 × high-speed fans |
| Network Connection | Ethernet (RJ45) |
| ASIC Chip | BM1398BB (7nm) |
| Chips per Hashboard | 76 |
| Number of Hashboards | 3 |
| Total Chip Count | 228 |
| Power Supply | Integrated APW12 PSU |
Performance Analysis
At 34.2 J/TH, the S19 represents a 24% efficiency improvement over the S17 (45 J/TH) and a 13% improvement over the S17 Pro (39.5 J/TH). Within the S19 family, the base S19 sits above the S19 Pro (29.5 J/TH) in efficiency, and is comparable to the S19j (36.1 J/TH). Compared to the S21 (17.5 J/TH), the S19 uses roughly twice the energy per terahash — but it also costs a fraction of the price.
The S19’s 95 TH/s hashrate is roughly half of what the S21 delivers (200 TH/s), but at current secondary market prices, the dollar-per-terahash acquisition cost of the S19 is highly competitive. For miners focused on maximizing hash per dollar of capital invested (rather than hash per dollar of electricity), the S19 remains compelling.
For a detailed comparison, see our Antminer S19 vs S21 Comparison Guide.
Daily and Monthly Power Costs
| Electricity Rate | Daily Power Cost | Monthly Power Cost | Viability |
|---|---|---|---|
| $0.05/kWh | $3.90 | $117 | Profitable — solid margins at cheap electricity rates |
| $0.08/kWh | $6.24 | $187 | Marginally profitable — monitor BTC price and difficulty |
| $0.10/kWh | $7.80 | $234 | Breakeven — best as a dual-purpose space heater |
| $0.12/kWh | $9.36 | $281 | Tight margins — consider undervolting or space heater conversion |
Use our Bitcoin Mining Profitability Calculator for real-time estimates with your exact electricity rate.
Heat Output
The S19 produces approximately 11,089 BTU/h of heat (3,250W × 3.412 BTU/W). This is equivalent to a large space heater and can meaningfully heat a room, garage, or basement. For Canadian and northern-climate miners, this waste heat directly offsets heating bills — effectively reducing the net cost of mining to near zero during winter months. See our Bitcoin Space Heater Assembly Guide for setup instructions.
Compatible Firmware
| Firmware | Compatibility | Key Features |
|---|---|---|
| Stock (Bitmain) | Full support | Default firmware, basic configuration |
| Braiins OS+ | Supported | Autotuning, Stratum V2, power capping, remote management |
| Vnish | Supported | Advanced overclocking, custom profiles, immersion mode |
| LuxOS | Supported | Curtailment features, fleet management, API access |
For installation guides, see: Braiins OS+ Setup Guide | Vnish Firmware Guide | LuxOS Guide | Firmware Update Guide
Best Use Cases in 2026
Home Mining: The S19 is one of the most popular miners for home operations. At 75 dB it is loud but manageable with proper placement (garage, basement, utility room). Its 95 TH/s delivers meaningful hashrate, and aftermarket firmware allows power tuning to optimize for your specific electricity rate.
Space Heater Conversion: At ~11,100 BTU/h, the S19 is a powerhouse heater. D-Central offers Bitcoin Space Heater conversions for the S19 platform, and our article on turning your S19 into a heater covers the full economic case.
Budget Mining Farm: Used S19 units offer excellent value per terahash of hashrate deployed. Operations with access to cheap electricity can build competitive hashrate at a fraction of new-hardware cost.
Undervolting: The S19 responds well to undervolting via Braiins OS+ or Vnish. Reducing power to ~2,500W while maintaining 75-85 TH/s dramatically improves efficiency and extends profitability at higher electricity rates. See our Complete Undervolting Guide.
Common Issues & Repair
The S19 is significantly more reliable than the S17 generation, but common issues still arise:
- Hashboard ASIC chip failures: BM1398 chips can fail due to thermal stress or manufacturing defects. Symptoms include missing hashrate on one or more chains (e.g., “Chain 1 only” errors). See our Chain X Only Fix Guide.
- APW12 PSU failures: The integrated power supply can develop capacitor or MOSFET issues. D-Central provides APW12 PSU repair services.
- Temperature warnings: Over-temperature shutdowns can be caused by blocked airflow, failed fans, or degraded thermal paste. See our Temp Too High Fix Guide.
- EEPROM errors: Control board EEPROM corruption can prevent hashboard detection. See our EEPROM Error Fix Guide.
D-Central offers professional Antminer S19 Repair services from our Canadian workshop. See our ASIC Repair Cost Estimator for pricing.
D-Central Services for the Antminer S19
- Repair: Hashboard, control board, PSU, and fan repair — Antminer S19 Repair
- PSU Service: APW12 diagnostics and repair — APW12 PSU Guide
- Space Heater Conversion: Turn your S19 into a heater — Bitcoin Space Heaters
- Undervolting: Optimize power consumption — Undervolting Guide
- Replacement Parts: Hashboards, fans, PSU components — Shop Parts
- Repair Cost Estimate: ASIC Repair Cost Estimator
Frequently Asked Questions
Is the Antminer S19 still profitable in 2026?
Yes, the S19 can still be profitable at electricity rates below $0.08/kWh. At $0.05/kWh, the S19 generates solid margins. At higher rates, undervolting with aftermarket firmware extends profitability, and space heater conversion makes the economics work even at $0.12/kWh during heating season.
How much electricity does the Antminer S19 use per day?
The S19 consumes approximately 3,250W continuously, translating to 78 kWh per day or about 2,340 kWh per month. At $0.10/kWh, that is $7.80/day or $234/month. Undervolting can reduce consumption to approximately 2,500W (60 kWh/day).
Can the Antminer S19 be used as a space heater?
Absolutely — the S19 outputs approximately 11,089 BTU/h of heat, making it a powerful heater. D-Central offers purpose-built space heater conversions. See our S19 heater article for the full case.
How does the S19 compare to the S19 Pro?
The S19 Pro delivers 110 TH/s at the same 3,250W power draw, achieving 29.5 J/TH — roughly 14% more efficient than the base S19. The S19 Pro uses 114 chips per hashboard versus the S19’s 76 chips. If available at similar prices, the S19 Pro is the better value.
What power supply does the S19 use?
The S19 uses an integrated APW12 power supply that runs on 200-277V AC. Unlike the S9 series, no separate PSU is needed. The APW12 requires a 220V+ outlet — standard 120V household circuits are not sufficient.