Antminer KS3 vs Thewindminer K9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Thewindminer K9 |
|---|---|---|
| 9.4 TH/s | Hashrate | 10.3 TH/s |
| 3,500 W | Power Consumption | 3,300 W |
| 372.3 J/TH | Efficiency | 320.4 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 14.8 kg |
| 11,942 BTU/hr | BTU Output | 11,260 BTU/hr |
| 36/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | KHeavyHash |
| Bitmain | Manufacturer | Thewindminer |
Profitability Comparison
Antminer KS3
Thewindminer K9
Based on BTC price of $77,962 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Thewindminer K9 edges it: 3 of 6 factors go its way (efficiency, hashrate, power consumption). The standout gap is 14% better efficiency (372 vs 320 J/TH) in the Thewindminer K9's favour. The Antminer KS3 holds the edge in home mining score and noise level and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer KS3 and Thewindminer K9 sit on each measurable spec:
- Thewindminer K9 10% more hashrate (9.4 vs 10.3 TH/s)
- Thewindminer K9 6% better power draw (3,500 vs 3,300 W)
- Thewindminer K9 14% better efficiency (372 vs 320 J/TH)
- Thewindminer K9 8% better weight (16.1 vs 14.8 kg)
- Antminer KS3 6% more heat output (11,942 vs 11,260 BTU/hr)
- Antminer KS3 64% more home mining score (36.0 vs 22.0)
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 | Thewindminer K9 |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $15,429 |
| -$8.06 | Daily net profit | -$7.55 |
| -$10,943 | Net after 1 year | -$18,185 |
| -$13,886 | Net after 2 years | -$20,941 |
| -$16,829 | Net after 3 years | -$23,697 |
| 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
Thewindminer K9320.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer KS3 or Thewindminer K9 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Thewindminer K9 is more profitable at $-7.55/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.
Which is quieter, the Antminer KS3 or Thewindminer K9?
The Antminer KS3 is quieter at 75 dB compared to the Thewindminer K9 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer KS3 or Thewindminer K9?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 22/100 for the Thewindminer K9). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer KS3 and Thewindminer K9 on J/TH?
The Antminer KS3 runs at 372.3 J/TH while the Thewindminer K9 runs at 320.4 J/TH — a difference of 52.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 14% better efficiency (372 vs 320 J/TH).