Antminer S21 vs Antminer S21 Pro
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer S21 Pro is the stronger pick — Higher hashrate and marginally better efficiency for operations prioritizing throughput. The Antminer S21 runs 200.0 TH/s at 17.5 J/TH; the Antminer S21 Pro runs 234.0 TH/s at 15 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| Antminer S21 | Specification | Antminer S21 Pro |
|---|---|---|
| 200.0 TH/s | Taux de hachage | 234.0 TH/s |
| 3,500 W | Consommation électrique | 3,510 W |
| 17.5 J/TH | Efficiency | 15.0 J/TH |
| 75 dB | Niveau de bruit | 75 dB |
| 14.6 kg | Weight | 15.0 kg |
| 11,942 BTU/hr | BTU Output | 11,976 BTU/hr |
| 8/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S21
Antminer S21 Pro
Based on BTC price of $64,804 and current network difficulty as of Jun 17, 2026. Actual results vary.
Verdict
Bitmain's S21 lineup includes both the standard S21 and the enhanced S21 Pro. Both use the same generation architecture but target different performance tiers.
The S21 Pro delivers higher hashrate and marginally better efficiency, but at a premium price. For most home miners, the standard S21 offers the best value. The Pro model targets operations where maximum hashrate per rack unit is the priority.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer S21 and Antminer S21 Pro sit on each measurable spec:
- Antminer S21 Pro 17% more hashrate (200 vs 234 TH/s)
- Antminer S21 Pro 14% better efficacité (17.5 vs 15.0 J/TH)
- Antminer S21 3% better weight (14.6 vs 15.0 kg)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Antminer S21 | Metric | Antminer S21 Pro |
|---|---|---|
| $5,500 | Upfront cost (MSRP) | $6,800 |
| -$1.88 | Daily net profit | -$0.79 |
| -$6,186 | Net after 1 year | -$7,090 |
| -$6,871 | Net after 2 years | -$7,379 |
| -$7,557 | Net after 3 years | -$7,669 |
| 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.
Foire aux questions
Is the S21 Pro worth the premium over the standard S21?
For home miners, the standard S21 typically offers better ROI due to its lower upfront cost. The Pro makes more sense for hosted or commercial operations where rack density matters.
Can both the S21 and S21 Pro run on standard household power?
Both require 240V circuits. The S21 Pro draws more power, so ensure your circuit breaker can handle the load. A dedicated 20A or 30A 240V circuit is recommended.