Miner comparison
Antminer S23 vs Antminer S21 XP
Both are air-cooled Bitmain Antminer models for SHA-256 (Bitcoin) mining, built 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 S23 at 305 TH/s on 3,355 W (11 J/TH) and the S21 XP at 270 TH/s on 3,645 W (13.5 J/TH), both at 25 °C inlet air. The S23 gives about 13% more hashrate on about 8% less power, so each terahash takes about 19% less electricity. The S23 is the heavier unit, at 20.6 kg net against 18.7 kg, and both are specified for -20 to 45 °C operation. The table below and the calculator work out what these figures mean with current network data.
Figures: Bitmain specification pages for Antminer S23 and Antminer S21 XP, checked 2026-10-10.
| Compare |  Bitmain Antminer S23Available |  Bitmain Antminer S21 XPAvailable |
|---|---|---|
| Price | ||
| Price | $7,931.55 | $2,944.05 |
| Price per TH/s | $26.01/TH | $10.90/TH |
| Condition | New | New |
| Specifications | ||
| Hashrate | 305 TH/s (±3%) | 270 TH/s (±3%) |
| Power consumption | 3,355 W (±5%) | 3,645 W (±5%) |
| Efficiency | 11 J/TH | 13.5 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 | 20.6 kg | 18.7 kg |
| Operating temperature | -20–45 °C | -20–45 °C |
| Operating economics | ||
| Electricity cost / day at $0.06/kWh | $4.83 | $5.25 |
| Est. revenue / day | $10.83 | $9.58 |
| Est. net / day at $0.06/kWh | $6.00 | $4.34 |
| Break-even electricity price | $0.134/kWh | $0.110/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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