Bitmain Antminer S21 XP Hyd vs Bitaxe Gamma
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 XP Hyd | Specification | Bitaxe Gamma |
|---|---|---|
| 473.0 TH/s | Hashrate | 1,200.0 GH/s |
| 5,676 W | Power Consumption | 15 W |
| 12.0 J/TH | Efficiency | 12.5 J/TH |
| 50 dB | Noise Level | 38 dB |
| 12.3 kg | Weight | 0.3 kg |
| 19,367 BTU/hr | BTU Output | 51 BTU/hr |
| 44/100 | Home Mining Score | 70/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | D-Central |
Profitability Comparison
Bitmain Antminer S21 XP Hyd
Bitaxe Gamma
Based on BTC price of $79,159 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S21 XP Hyd comes out ahead — it takes 3 of 6 (efficiency, hashrate, price-performance). Its biggest concrete edge: 39317% more hashrate (473.0 vs 1.2 TH/s). That said, the Bitaxe Gamma isn't beaten everywhere — it still wins power consumption and home mining score and noise level. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the Bitmain Antminer S21 XP Hyd and Bitaxe Gamma actually differ, with the gap quantified:
- Bitmain Antminer S21 XP Hyd 39317% more hashrate (473.0 vs 1.2 TH/s)
- Bitaxe Gamma 100% better power draw (5,676.0 vs 15.0 W)
- Bitmain Antminer S21 XP Hyd 4% better efficiency (12.0 vs 12.5 J/TH)
- Bitaxe Gamma 24% better noise (50.0 vs 38.0 dB)
- Bitaxe Gamma 98% better weight (12.3 vs 0.3 kg)
- Bitmain Antminer S21 XP Hyd 37725% more heat output (19,366.5 vs 51.2 BTU/hr)
- Bitaxe Gamma 59% more home mining score (44.0 vs 70.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitmain Antminer S21 XP Hyd | Metric | Bitaxe Gamma |
|---|---|---|
| $5,099 | Upfront cost (MSRP) | $99 |
| $4.15 | Daily net profit | $0.01 |
| -$3,586 | Net after 1 year | -$96 |
| -$2,073 | Net after 2 years | -$92 |
| -$559 | Net after 3 years | -$89 |
| Takes ~3.4 years to pay back at current rates | Payback period | Takes ~29.9 years to pay back at current rates |
At the default rate, the Bitmain Antminer S21 XP Hyd reaches break-even first — but plug in your own electricity cost above, since payback shifts sharply with it.
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
Bitmain Antminer S21 XP Hyd$4.14/day higher profit at current rates.
Best for Home Mining
Bitaxe GammaScore: 70/100. 38 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP Hyd12.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer S21 XP Hyd or Bitaxe Gamma more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP Hyd is more profitable at $4.15/day compared to $0.01/day for the Bitaxe Gamma. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 XP Hyd vs Bitaxe Gamma: which runs at a lower noise level?
The Bitaxe Gamma is quieter at 38 dB compared to the Bitmain Antminer S21 XP Hyd at 50 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer S21 XP Hyd or the Bitaxe Gamma?
The Bitaxe Gamma scores 70/100 on our Home Mining Score (vs 44/100 for the Bitmain Antminer S21 XP Hyd). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 XP Hyd vs Bitaxe Gamma: how much does the efficiency gap matter?
The Bitmain Antminer S21 XP Hyd runs at 12.0 J/TH while the Bitaxe Gamma runs at 12.5 J/TH — a difference of 0.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 4% better efficiency (12.0 vs 12.5 J/TH).