Bitmain Antminer KS5 (20Th) vs Thewindminer K9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS5 (20Th) | Specification | Thewindminer K9 |
|---|---|---|
| 20.0 TH/s | Hashrate | 10.3 TH/s |
| 3,000 W | Power Consumption | 3,300 W |
| 150.0 J/TH | Efficiency | 320.4 J/TH |
| 75 dB | Noise Level | — |
| 15.8 kg | Weight | 14.8 kg |
| 10,236 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
Bitmain Antminer KS5 (20Th)
Thewindminer K9
Based on BTC price of $77,929 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer KS5 (20Th) edges it: 6 of 6 factors go its way (efficiency, hashrate, power consumption, home mining score, noise level, price-performance). Its biggest concrete edge: 53% better efficiency (150 vs 320 J/TH). 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 KS5 (20Th) and Thewindminer K9 actually differ, with the gap quantified:
- Bitmain Antminer KS5 (20Th) 94% more hashrate (20.0 vs 10.3 TH/s)
- Bitmain Antminer KS5 (20Th) 9% better power draw (3,000 vs 3,300 W)
- Bitmain Antminer KS5 (20Th) 53% better efficiency (150 vs 320 J/TH)
- Thewindminer K9 6% better weight (15.8 vs 14.8 kg)
- Thewindminer K9 10% more heat output (10,236 vs 11,260 BTU/hr)
- Bitmain Antminer KS5 (20Th) 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.
| Bitmain Antminer KS5 (20Th) | Metric | Thewindminer K9 |
|---|---|---|
| $799 | Upfront cost (MSRP) | $15,429 |
| -$6.48 | Daily net profit | -$7.55 |
| -$3,165 | Net after 1 year | -$18,185 |
| -$5,531 | Net after 2 years | -$20,941 |
| -$7,898 | 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
Bitmain Antminer KS5 (20Th)Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer KS5 (20Th)150.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer KS5 (20Th) or the Thewindminer K9?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer KS5 (20Th) is more profitable at $-6.48/day compared to $-7.55/day for the Thewindminer K9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Antminer KS5 (20Th) or Thewindminer K9?
The Bitmain Antminer KS5 (20Th) 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.
For mining at home, should I pick the Bitmain Antminer KS5 (20Th) or the Thewindminer K9?
The Bitmain Antminer KS5 (20Th) 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 Bitmain Antminer KS5 (20Th) and Thewindminer K9 on J/TH?
The Bitmain Antminer KS5 (20Th) runs at 150.0 J/TH while the Thewindminer K9 runs at 320.4 J/TH — a difference of 170.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 53% better efficiency (150 vs 320 J/TH).