Technical Specifications
| Hashrate | 234 TH/s |
|---|---|
| Power Consumption | 3,510 W |
| Efficiency | 15 J/TH |
| Algorithm | SHA-256 |
| Mineable Coins | Bitcoin , Bitcoin Cash |
| Noise Level | 75 dB(A) |
| Cooling | Air — 4 fans |
| Dimensions | 400 × 195 × 290 mm |
| Weight | 14.4 kg |
| Release | 2024-Q1 |
| Approx. Price | ~$4,500 USD |
Mining Profitability in 2026
The Bitmain Antminer S21 Pro can be pointed at different algorithms and coins. Use our individual coin calculators with the hashrates listed in the table above:
Break-even tip: Enter the approximate price of this unit (~$4,500) in the hardware cost field of the calculator to see your estimated days-to-break-even based on current network conditions.
Pros & Cons
Pros
- Highest hashrate in Bitmain's S21 lineup (234 TH/s)
- Best-in-class SHA-256 efficiency at 15 J/TH
- Mature Bitmain firmware ecosystem with BOS+ support
Cons
- High acquisition cost ($4,000–$5,000 new)
- 3,510 W draw requires a dedicated 16 A / 220 V circuit
- 75 dB noise — unsuitable for residential environments
Frequently Asked Questions
Is the Antminer S21 Pro profitable in 2026?
At electricity rates below $0.07/kWh, the S21 Pro is profitable at most BTC prices seen in 2026. Its 15 J/TH efficiency is the best in its segment, meaning it withstands network difficulty and price dips better than older hardware. Use our Bitcoin mining calculator with 234 TH/s and 3,510 W to check current profitability at your electricity rate.
What power supply does the Antminer S21 Pro require?
The S21 Pro ships with an integrated PSU rated for 3,600 W. It needs a dedicated 16 A circuit at 220–240 V, or a 20 A circuit at 110–120 V. Standard home circuits (15 A at 120 V) are insufficient — a dedicated electrical line or industrial facility is required.
How loud is the Antminer S21 Pro?
The S21 Pro produces approximately 75 dB(A) at full load — equivalent to a vacuum cleaner running continuously. It is not suitable for home or residential use without substantial soundproofing. Most operators deploy ASICs in purpose-built containers or warehouse facilities where noise and heat can be managed.
Where can I buy the Antminer S21 Pro?
Available directly from Bitmain (shop.bitmain.com), from authorised resellers such as MinerBros and Kaboomracks, and on secondary markets including eBay and Compass Mining. Prices vary significantly between new and used units; compare efficiency ratings and warranty terms before purchasing.
Where to Buy
The Bitmain Antminer S21 Pro is available from:
- Bitmain Official Shop — shop.bitmain.com (new units, with warranty)
- MinerBros — authorised reseller, ships globally
- Kaboomracks — US-based reseller, new and refurbished
- eBay / secondary market — used units, verify hashrate stability before purchasing
Price estimates on this page are approximate and subject to market fluctuations. Always compare prices from multiple sellers before purchasing.
Compare the Bitmain Antminer S21 Pro
See how the Bitmain Antminer S21 Pro stacks up against other miners that can mine the same coins — hashrate, power draw, efficiency, and profitability side by side: