Miner comparison
Antminer S21 XP vs Antminer S21+
Both are air-cooled Bitmain Antminer S21 models for SHA-256 (Bitcoin) mining, in the same 450 × 219 × 293 mm housing, on the same single-phase 220–277 V AC supply drawing up to 20 A, and both rated at 76 dBA. The difference is efficiency. Bitmain rates the S21 XP at 270 TH/s on 3,645 W (13.5 J/TH) and the S21+ at 216 TH/s on 3,564 W (16.5 J/TH), both at 25 °C inlet air. The XP gives 25% more hashrate for about 2% more power, so each terahash takes about 18% less electricity. The S21+ is the heavier of the two, at 21.5 kg net against 18.7 kg. Both are specified for -20 to 45 °C operation at up to 2,000 m altitude. The table below and the calculator work out what these figures mean with current network data.
Figures: Bitmain specification pages for Antminer S21 XP and Antminer S21+, checked 2026-10-10.
| Compare |  Bitmain Antminer S21 XPAvailable |  Bitmain Antminer S21+Available |
|---|---|---|
| Price | ||
| Price | $2,944.05 | $1,519.05 |
| Price per TH/s | $10.90/TH | $7.03/TH |
| Condition | New | New |
| Specifications | ||
| Hashrate | 270 TH/s (±3%) | 216 TH/s (±3%) |
| Power consumption | 3,645 W (±5%) | 3,564 W (±5%) |
| Efficiency | 13.5 J/TH | 16.5 J/TH |
| Algorithm | SHA-256 | SHA-256 |
| Input voltage | 220–277 V AC | 220–277 V AC |
| Electrical phase | Single-phase | Single-phase |
| Cooling type | Air-cooled | Air-cooled |
| Noise level | 76 dB | 76 dB |
| Dimensions (L × W × H) | 450 × 219 × 293 mm | 450 × 219 × 293 mm |
| Net weight | 18.7 kg | 21.5 kg |
| Operating temperature | -20–45 °C | -20–45 °C |
| Release date | — | October 2024 |
| Operating economics | ||
| Electricity cost / day at $0.06/kWh | $5.25 | $5.13 |
| Est. revenue / day | $9.58 | $7.67 |
| Est. net / day at $0.06/kWh | $4.34 | $2.54 |
| Break-even electricity price | $0.110/kWh | $0.090/kWh |
Green marks the better value in a row (higher hashrate; lower power, J/TH, noise, weight, price and electricity cost). Specifications are as recorded for each product; “—” means the value is not stated. Economics are estimates at network conditions of 2026-10-28, $0.06/kWh, 2% pool fee and 100% uptime, and are not a forecast of earnings.
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