Bitmain Antminer S21 Immersion (227Th)
Antminer KS3 vs Bitmain Antminer S21 Immersion (227Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer S21 Immersion (227Th) |
|---|---|---|
| 9.4 TH/s | Taux de hachage | 227.0 TH/s |
| 3,500 W | Consommation électrique | 3,623 W |
| 372.3 J/TH | Efficiency | 16.0 J/TH |
| 75 dB | Niveau de bruit | 75 dB |
| 16.1 kg | Weight | 17.2 kg |
| 11,942 BTU/hr | BTU Output | 12,362 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| KHeavyHash | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
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
Selon notre analyse multifactorielle, le Bitmain Antminer S21 Immersion (227Th) l'emporte sur 3 des 5 facteurs (efficacité, hashrate, rapport qualité-prix). The standout gap is 2315% more hashrate (9.4 vs 227.0 TH/s) in the Bitmain Antminer S21 Immersion (227Th)'s favour. The Antminer KS3 claws back ground on consommation électrique and score de minage domestique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer KS3 and Bitmain Antminer S21 Immersion (227Th) sit on each measurable spec:
- Bitmain Antminer S21 Immersion (227Th) 2315% more hashrate (9.4 vs 227.0 TH/s)
- Antminer KS3 3% better power draw (3,500 vs 3,623 W)
- Bitmain Antminer S21 Immersion (227Th) 96% better efficacité (372.3 vs 16.0 J/TH)
- Antminer KS3 6% better weight (16.1 vs 17.2 kg)
- Bitmain Antminer S21 Immersion (227Th) 4% more heat output (11,942 vs 12,362 BTU/hr)
- Antminer KS3 20% more score de minage domestique (36.0 vs 30.0)
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 KS3 | Metric | Bitmain Antminer S21 Immersion (227Th) |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $3,269 |
| -$8.06 | Daily net profit | -$0.53 |
| -$10,943 | Net after 1 year | -$3,462 |
| -$13,885 | Net after 2 years | -$3,654 |
| -$16,828 | 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 KS3Score: 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
Antminer KS3 vs Bitmain Antminer S21 Immersion (227Th): which one earns more per day?
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 $-8.06/day for the Antminer KS3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer KS3 or the Bitmain Antminer S21 Immersion (227Th) better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer KS3 or Bitmain Antminer S21 Immersion (227Th)?
The Antminer KS3 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 KS3 and Bitmain Antminer S21 Immersion (227Th)?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer S21 Immersion (227Th) runs at 16.0 J/TH — a difference of 356.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 96% better efficacité (372.3 vs 16.0 J/TH).