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The Bitmain Antminer S21 series is Bitmain's flagship air-cooled SHA-256 mining platform, delivering industry-leading efficiency from 17.5 J/T down to 13.5 J/T.
Bitmain Antminer S21
The S21 serves as the baseline model of Bitmain's S21 air-cooled platform, delivering reliable 200 TH/s SHA-256 mining performance and an excellent energy efficiency of 17.5 J/TH.
Core Specifications
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Hashrate / Power Consumption / Energy Efficiency: 200 TH/s 3500 W 17.5 J/T
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Dimensions: 400 × 195 × 290 mm (bare unit) / 570 × 316 × 430 mm (packaged)
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Weight: 15.4 kg (net) / 17.2 kg (gross)
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Noise Level: 76 dBA @ 30°C at maximum fan speed
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Voltage / Frequency / Current: 220–277V AC 50/60 Hz 20 A (single-phase)
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Network Interface: RJ45 Ethernet 10/100M
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Environmental Requirements: Operating temperature 0–45°C Storage temperature -20–70°C Humidity 10–90% RH (non-condensing) Operating altitude ≤ 2000 m
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Warranty Period: 365 days (subject to Bitmain's official warranty terms)
Bitmain Antminer S21 Pro
The S21 Pro delivers a lower energy efficiency ratio of 15.0 J/T and robust hashrate of up to 234 TH/s, making it well-suited for regions with low electricity costs and professional mining farms.
Core Specifications
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Hashrate / Power Consumption / Energy Efficiency: 234 TH/s 3510 W 15.0 J/T
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Dimensions: 450 × 219 × 293 mm (bare unit) / 630 × 350 × 430 mm (packaged)
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Weight: 18.5 kg (net) / 21.5 kg (gross)
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Cooling / Noise Level: Air-cooled | 76 dBA @ 25°C
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Voltage / Frequency / Current: 220–277V AC 50/60 Hz 20 A (single-phase)
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Network Interface: RJ45 Ethernet 10/100M
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Environmental Requirements: Operating temperature -20–45°C Storage temperature -20–70°C Humidity 10–90% RH (non-condensing) Operating altitude ≤ 2000 m
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Warranty Period: 365 days (Bitmain official warranty)
Bitmain Antminer S21+
Built on the S21 platform with an enlarged chassis (450mm wide-body), the S21+ boosts hashrate to 216 TH/s and improves energy efficiency to 16.5 J/T.
Core Specifications
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Hashrate / Power Consumption / Energy Efficiency: 216 TH/s 3564 W 16.5 J/T
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Dimensions: 450 × 219 × 293 mm (bare unit) / 630 × 350 × 430 mm (packaged)
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Weight: 21.5 kg (net) / 24.5 kg (gross)
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Cooling / Noise Level: Air-cooled | 76 dBA @ 25°C
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Voltage / Frequency / Current: 220–277V AC 50/60 Hz 20 A (single-phase)
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Network Interface: RJ45 Ethernet 10/100M
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Environmental Requirements: Operating temperature -20–45°C Storage temperature -20–70°C Humidity 10–90% RH (non-condensing) Operating altitude ≤ 2000 m
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Warranty Period: 365 days (Bitmain official warranty)
Bitmain Antminer S21 XP
The S21 XP is the flagship model of the S21 air-cooled series, pushing hashrate to 270 TH/s while achieving an industry-leading energy efficiency of 13.5 J/T — one of the highest efficiency benchmarks for air-cooled Bitcoin miners in 2025.
Core Specifications
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Hashrate / Power Consumption / Energy Efficiency: 270 TH/s 3645 W 13.5 J/T
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Dimensions: 449 × 219 × 293 mm (bare unit) / 640 × 360 × 450 mm (packaged)
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Weight: 18.7 kg (net) / 21.5 kg (gross)
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Cooling / Noise Level: Air-cooled 76 dBA @ 30°C Maximum airflow 550 CFM
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Voltage / Frequency / Current: 220–277V AC 50/60 Hz 20 A (single-phase)
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Network Interface: RJ45 Ethernet 10/100M
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Environmental Requirements: Operating temperature -20–45°C Storage temperature -20–70°C Humidity 10–90% RH (non-condensing) Operating altitude ≤ 2000 m
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Warranty Period: 365 days (Bitmain official warranty)
