Antminer S21+ vs Antminer S21 Pro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21+ | Specification | Antminer S21 Pro |
|---|---|---|
| 216.0 TH/s | Hashrate | 234.0 TH/s |
| 3,564 W | Power Consumption | 3,510 W |
| 16.5 J/TH | Efficiency | 15.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 15.0 kg | Weight | 15.0 kg |
| 12,160 BTU/hr | BTU Output | 11,976 BTU/hr |
| 30/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21+
Antminer S21 Pro
Based on BTC price of $78,163 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
The S21+ and S21 Pro represent Bitmain's upper performance tiers within the S21 generation. Both push beyond the base S21 but in slightly different ways.
Differences are marginal between these two premium variants. The Pro typically offers the highest raw hashrate, while the S21+ targets a balance of performance and value. At similar prices, hashrate-per-dollar determines the winner.
Spec Deltas
Here is every spec where the Antminer S21+ and Antminer S21 Pro actually differ, with the gap quantified:
- Antminer S21 Pro 8% more hashrate (216 vs 234 TH/s)
- Antminer S21 Pro 2% better power draw (3,564 vs 3,510 W)
- Antminer S21 Pro 9% better efficiency (16.5 vs 15.0 J/TH)
- Antminer S21+ 2% more heat output (12,160 vs 11,976 BTU/hr)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer S21+ | Metric | Antminer S21 Pro |
|---|---|---|
| $6,500 | Upfront cost (MSRP) | $6,800 |
| -$0.78 | Daily net profit | -$0.01 |
| -$6,786 | Net after 1 year | -$6,803 |
| -$7,072 | Net after 2 years | -$6,805 |
| -$7,359 | Net after 3 years | -$6,808 |
| Does not pay back at current rates (negative daily profit) | Payback period | Does not pay back at current rates (negative daily profit) |
Projections assume continuous operation, a flat $0.10/kWh rate, and no hardware degradation, pool fees, or BTC price change. Real-world ROI varies.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Antminer S21 Pro15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Are these worth the premium over the base S21?
For commercial operations where every watt counts, yes. For home miners or those with cheap electricity, the base S21 often provides better ROI due to its lower upfront cost.
Which should I choose for a hosting operation?
The S21 Pro if you want maximum hashrate per slot. The S21+ if it offers better price-per-TH at the time of purchase.