Bitmain Antminer KS3 (9.4Th) vs Thewindminer K9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS3 (9.4Th) | 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 |
| — | Noise Level | — |
| 17.7 kg | Weight | 14.8 kg |
| 11,942 BTU/hr | BTU Output | 11,260 BTU/hr |
| 22/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | KHeavyHash |
| Bitmain | Manufacturer | Thewindminer |
Profitability Comparison
Bitmain Antminer KS3 (9.4Th)
Thewindminer K9
Based on BTC price of $77,929 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Thewindminer K9, which leads on 3 of 4 weighted factors (efficiency, hashrate, power consumption). Its biggest concrete edge: 14% better efficiency (372 vs 320 J/TH). The Bitmain Antminer KS3 (9.4Th) claws back ground on price-performance. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer KS3 (9.4Th) and Thewindminer K9 actually differ, with the gap quantified:
- 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 16% better weight (17.7 vs 14.8 kg)
- Bitmain Antminer KS3 (9.4Th) 6% more heat output (11,942 vs 11,260 BTU/hr)
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.
| Bitmain Antminer KS3 (9.4Th) | Metric | Thewindminer K9 |
|---|---|---|
| $2,500 | Upfront cost (MSRP) | $15,429 |
| -$8.06 | Daily net profit | -$7.55 |
| -$5,443 | Net after 1 year | -$18,185 |
| -$8,386 | Net after 2 years | -$20,941 |
| -$11,329 | 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
Thewindminer K9320.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer KS3 (9.4Th) 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 Bitmain Antminer KS3 (9.4Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer KS3 (9.4Th) or the Thewindminer K9 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 Bitmain Antminer KS3 (9.4Th) or Thewindminer K9?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
How far apart are the Bitmain Antminer KS3 (9.4Th) and Thewindminer K9 on J/TH?
The Bitmain Antminer KS3 (9.4Th) 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).