Bitmain Antminer S21 Immersion (227Th)
Antminer K7 vs Bitmain Antminer S21 Immersion (227Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S21 Immersion (227Th) |
|---|---|---|
| 63.5 TH/s | Taux de hachage | 227.0 TH/s |
| 3,080 W | Consommation électrique | 3,623 W |
| 48.5 J/TH | Efficiency | 16.0 J/TH |
| 75 dB | Niveau de bruit | 75 dB |
| 14.0 kg | Weight | 17.2 kg |
| 10,509 BTU/hr | BTU Output | 12,362 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| Eaglesong | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S21 Immersion (227Th)
Based on BTC price of $78,185 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21 Immersion (227Th) edges it: 3 of 5 factors go its way (efficacité, hashrate, rapport qualité-prix). Its biggest concrete edge: 257% more hashrate (63.5 vs 227.0 TH/s). That said, the Antminer K7 isn't beaten everywhere — it still wins consommation électrique and score de minage domestique. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Antminer K7 and Bitmain Antminer S21 Immersion (227Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 Immersion (227Th) 257% more hashrate (63.5 vs 227.0 TH/s)
- Antminer K7 15% better power draw (3,080 vs 3,623 W)
- Bitmain Antminer S21 Immersion (227Th) 67% better efficacité (48.5 vs 16.0 J/TH)
- Antminer K7 18% better weight (14.0 vs 17.2 kg)
- Bitmain Antminer S21 Immersion (227Th) 18% more heat output (10,509 vs 12,362 BTU/hr)
- Antminer K7 20% more score de minage domestique (36.0 vs 30.0)
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 K7 | Metric | Bitmain Antminer S21 Immersion (227Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $3,269 |
| -$5.11 | Daily net profit | -$0.53 |
| -$5,364 | Net after 1 year | -$3,462 |
| -$7,228 | Net after 2 years | -$3,654 |
| -$9,093 | Net after 3 years | -$3,847 |
| 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
Antminer K7Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Immersion (227Th)16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer K7 or Bitmain Antminer S21 Immersion (227Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Immersion (227Th) is more profitable at $-0.53/day compared to $-5.11/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer K7 or Bitmain Antminer S21 Immersion (227Th)?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer K7 or Bitmain Antminer S21 Immersion (227Th)?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 30/100 for the Bitmain Antminer S21 Immersion (227Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer K7 and Bitmain Antminer S21 Immersion (227Th)?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S21 Immersion (227Th) runs at 16.0 J/TH — a difference of 32.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 67% better efficacité (48.5 vs 16.0 J/TH).