Antminer KS3 vs Bitmain T21 (190TH)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain T21 (190TH) |
|---|---|---|
| 9.4 TH/s | Taux de hachage | 190.0 TH/s |
| 3,500 W | Consommation électrique | 3,610 W |
| 372.3 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Niveau de bruit | 76 dB |
| 16.1 kg | Weight | 16.4 kg |
| 11,942 BTU/hr | BTU Output | 12,317 BTU/hr |
| 36/100 | Home Mining Score | 23/100 |
| — | Release Year | — |
| KHeavyHash | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain T21 (190TH)
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 T21 (190TH) edges it: 3 of 6 factors go its way (efficacité, hashrate, rapport qualité-prix). Where it pulls away hardest is 1921% more hashrate (9.4 vs 190.0 TH/s). That said, the Antminer KS3 isn't beaten everywhere — it still wins consommation électrique and score de minage domestique and niveau sonore. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Antminer KS3 and Bitmain T21 (190TH) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain T21 (190TH) 1921% more hashrate (9.4 vs 190.0 TH/s)
- Antminer KS3 3% better power draw (3,500 vs 3,610 W)
- Bitmain T21 (190TH) 95% better efficacité (372.3 vs 19.0 J/TH)
- Antminer KS3 1% better noise (75.0 vs 76.0 dB)
- Antminer KS3 2% better weight (16.1 vs 16.4 kg)
- Bitmain T21 (190TH) 3% more heat output (11,942 vs 12,317 BTU/hr)
- Antminer KS3 57% more score de minage domestique (36.0 vs 23.0)
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.
| Antminer KS3 | Metric | Bitmain T21 (190TH) |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $1,700 |
| -$8.06 | Daily net profit | -$1.83 |
| -$10,943 | Net after 1 year | -$2,367 |
| -$13,885 | Net after 2 years | -$3,034 |
| -$16,828 | Net after 3 years | -$3,702 |
| 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 T21 (190TH)19.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer KS3 or Bitmain T21 (190TH) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain T21 (190TH) is more profitable at $-1.83/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 T21 (190TH) better for noise-sensitive spaces?
The Antminer KS3 is quieter at 75 dB compared to the Bitmain T21 (190TH) at 76 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer KS3 or the Bitmain T21 (190TH)?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 23/100 for the Bitmain T21 (190TH)). 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 T21 (190TH)?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain T21 (190TH) runs at 19.0 J/TH — a difference of 353.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 95% better efficacité (372.3 vs 19.0 J/TH).