Bitmain Antminer S21 (200Th)
Professional-Grade Miner
This miner draws 3,550W and produces 75+ dB of noise — it is designed for dedicated mining environments, not living spaces. Professional-grade miners deliver the highest hashrate and revenue per unit but require proper infrastructure: a 240V circuit, adequate ventilation or exhaust ducting, and a space where noise is not a concern (garage, basement, warehouse, or outdoor enclosure).
For home miners looking for a quieter alternative, consider our Bitcoin Space Heater builds or explore open-source miners like the Bitaxe that are purpose-built for residential environments.
Profitability Calculator
| Period | Revenue | Electricity Cost | Profit |
|---|---|---|---|
| Daily | $5.51 | $5.96 | $-0.46 |
| Weekly | $38.56 | $41.75 | $-3.19 |
| Monthly | $165.26 | $178.92 | $-13.66 |
| Yearly | $2,010.70 | $2,176.86 | $-166.16 |
Heating offset estimates the value of heat replacing an electric space heater during heating season (~6 months/year in Canada). Actual savings depend on your heating setup and climate.
Where to Buy the Bitmain Antminer S21 (200Th)
D-Central Technologies
CanadaBitcoin Mining Hackers since 2016. Ships from Laval, Quebec.
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United StatesWide selection of new and used ASIC miners. US-based shipping.
Shop NowFull Specifications
| Model | Bitmain Antminer S21 (200Th) |
| Model Number | Antminer S21 (200Th) |
| Manufacturer | Bitmain |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 200 TH/s |
| Power Consumption | 3,550 W |
| Efficiency | 17.8 J/TH |
| Dimensions | 400 x 195 x 290mm |
| Weight | 14.2 |
| BTU Output | 12113 BTU/hr |
| Equivalent Heater | Equal to a 3,550W space heater |
| Daily Power Cost | $5.96/day |
| Monthly Power Cost | $178.92/mo |
| Circuit Requirement | 240V circuit required |
| Release Date | 2024-03-01 |
| MSRP | $1,075.83 |
| Status | Active |
Custom Power Profiles
With custom firmware like DCENT_OS, this miner can be tuned across a wide range of power levels. Lower wattage improves efficiency and reduces electricity costs; higher wattage increases hashrate at the expense of efficiency.
| Wattage | Hashrate | Efficiency |
|---|---|---|
| 1,630 W | 92 TH/s | 17.7 J/TH |
| 1,960 W | 109 TH/s | 18 J/TH |
| 2,280 W | 127 TH/s | 18 J/TH |
| 2,610 W | 145 TH/s | 18 J/TH |
| 2,930 W | 163 TH/s | 18 J/TH |
| 3,250 W | 181 TH/s | 18 J/TH |
| 3,580 W | 199 TH/s | 18 J/TH |
| 3,880 W | 217 TH/s | 17.9 J/TH |
| 4,210 W | 235 TH/s | 17.9 J/TH |
| 4,530 W | 253 TH/s | 17.9 J/TH |
| 4,860 W | 271 TH/s | 17.9 J/TH |
| 5,500 W | 307 TH/s | 17.9 J/TH |
| 6,150 W | 342 TH/s | 18 J/TH |
| 6,480 W | 360 TH/s | 18 J/TH |
Actual performance varies by individual unit silicon quality, ambient temperature, and cooling configuration. These operating points are achievable with custom tuning firmware such as DCENT_OS; values are calculated at runtime by the autotuner, not fixed presets.
Home Mining Assessment
The Bitmain Antminer S21 (200Th) is a SHA-256 cryptocurrency miner manufactured by Bitmain. It delivers a hashrate of 200 TH/s with a power consumption of 3550W, achieving an efficiency of 17.8 J/TH.
Weighs 14.2 kg, measures 400 x 195 x 290mm.
With a home mining score of 16/100, this miner is best suited for dedicated mining spaces for residential use. It produces 12113 BTU/h of heat output, making it effective for supplemental space heating.
At 17.8 J/TH, the Bitmain Antminer S21 (200Th) sits in the current-generation efficiency tier, competitive with modern SHA-256 hardware (roughly 13-19 J/TH).
Its waste heat (around 12113 BTU/h) can be ducted into a room, turning money you would otherwise spend on heating into hashrate.
View detailed specifications, real-time profitability calculations, and comparison data for the Bitmain Antminer S21 (200Th) in our comprehensive ASIC miner database.
Antminer S21 specs, repair, and parts
Use the S21 cluster to connect current-generation specs, buying options, chip-level parts, troubleshooting, and repair support.
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Compare the Bitmain Antminer S21 (200Th)
Frequently Asked Questions
What are the current mining economics for the Bitmain Antminer S21 (200Th)?
At $0.07/kWh, the Bitmain Antminer S21 (200Th) currently shows an estimated daily net cost of $0.46 before pool fees and hardware cost. Lower electricity rates, network changes, BTC price changes, or useful heat recovery can change the result.
Can I mine Bitcoin at home with the Bitmain Antminer S21 (200Th)?
The Bitmain Antminer S21 (200Th) has a home mining score of 16/100. With 0 dB noise and 3,550W power draw, it may require a dedicated space like a garage, basement, or outdoor enclosure. Consider noise insulation and proper ventilation.
Can the Bitmain Antminer S21 (200Th) heat my home?
The Bitmain Antminer S21 (200Th) outputs approximately 12113 BTU/hr of heat. For reference, a typical space heater produces 5,000-5,500 BTU/hr. All electrical energy consumed by the miner is converted to heat, making it 100% efficient as a heater. D-Central offers Bitcoin Space Heater builds designed specifically for home heating integration.
What power supply does the Bitmain Antminer S21 (200Th) need?
The Bitmain Antminer S21 (200Th) draws 3,550W of power. You need a power supply rated for at least 3,905W with appropriate voltage (200-240V AC). D-Central stocks compatible power supplies in our shop. Always use a quality PSU from a reputable manufacturer to protect the miner and wiring.