Bitmain Antminer KS3 (9.4Th) vs Bitmain Antminer KS5 Pro (21Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS3 (9.4Th) | Specification | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| 9.4 TH/s | Taux de hachage | 21.0 TH/s |
| 3,500 W | Consommation électrique | 3,150 W |
| 372.3 J/TH | Efficiency | 150.0 J/TH |
| — | Niveau de bruit | 75 dB |
| 17.7 kg | Weight | 15.8 kg |
| 11,942 BTU/hr | BTU Output | 10,748 BTU/hr |
| 22/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| KHeavyHash | Algorithme | KHeavyHash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer KS3 (9.4Th)
Bitmain Antminer KS5 Pro (21Th)
Based on BTC price of $78,217 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Selon notre analyse multifactorielle, le Bitmain Antminer KS5 Pro (21Th) l'emporte sur 6 des 6 facteurs (efficacité, hashrate, consommation électrique, score de minage domestique, niveau sonore, rapport qualité-prix). Its biggest concrete edge: 60% better efficacité (372 vs 150 J/TH). The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer KS3 (9.4Th) and Bitmain Antminer KS5 Pro (21Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer KS5 Pro (21Th) 123% more hashrate (9.4 vs 21.0 TH/s)
- Bitmain Antminer KS5 Pro (21Th) 10% better power draw (3,500 vs 3,150 W)
- Bitmain Antminer KS5 Pro (21Th) 60% better efficacité (372 vs 150 J/TH)
- Bitmain Antminer KS5 Pro (21Th) 11% better weight (17.7 vs 15.8 kg)
- Bitmain Antminer KS3 (9.4Th) 11% more heat output (11,942 vs 10,748 BTU/hr)
- Bitmain Antminer KS5 Pro (21Th) 64% more score de minage domestique (22.0 vs 36.0)
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 KS3 (9.4Th) | Metric | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| $2,500 | Upfront cost (MSRP) | $860 |
| -$8.06 | Daily net profit | -$6.80 |
| -$5,443 | Net after 1 year | -$3,344 |
| -$8,385 | Net after 2 years | -$5,827 |
| -$11,328 | Net after 3 years | -$8,311 |
| 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
Bitmain Antminer KS5 Pro (21Th)Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer KS5 Pro (21Th)150.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer KS3 (9.4Th) vs Bitmain Antminer KS5 Pro (21Th): which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer KS5 Pro (21Th) is more profitable at $-6.80/day compared to $-8.06/day for the Bitmain Antminer KS3 (9.4Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer KS3 (9.4Th) or Bitmain Antminer KS5 Pro (21Th)?
The Bitmain Antminer KS5 Pro (21Th) is quieter at 75 dB compared to the Bitmain Antminer KS3 (9.4Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Bitmain Antminer KS3 (9.4Th) or Bitmain Antminer KS5 Pro (21Th)?
The Bitmain Antminer KS5 Pro (21Th) scores 36/100 on our Home Mining Score (vs 22/100 for the Bitmain Antminer KS3 (9.4Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer KS3 (9.4Th) and Bitmain Antminer KS5 Pro (21Th) on J/TH?
The Bitmain Antminer KS3 (9.4Th) runs at 372.3 J/TH while the Bitmain Antminer KS5 Pro (21Th) runs at 150.0 J/TH — a difference of 222.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 60% better efficacité (372 vs 150 J/TH).