Specification sheet
- Manufacturer
- Bitmain
- Model
- Antminer S21
- Algorithm
- SHA-256
- Hashrate
- 200 TH/s
- Power draw
- 3,500 W
- Efficiency
- 17.5 W per TH/s
- Status
- Current
Nominal figures observed . Source: bitmain.com. Real power and hashrate vary by unit, firmware, and environment.
The Antminer S21 is an application-specific integrated circuit miner for SHA-256 networks. This profile records nominal specifications for comparison; real power, hashrate, noise, and thermal behavior vary by unit, firmware, environment, and operating mode.
Recorded specifications
The source reviewed on September 4, 2026 listed a nominal hashrate of 200 TH/s and power demand of 3,500 W. Confirm the exact variant and current manufacturer documentation before purchasing or installing equipment.