Antminer KS5 Pro vs Thewindminer K9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS5 Pro | Specification | Thewindminer K9 |
|---|---|---|
| 21.0 TH/s | Hashrate | 10.3 TH/s |
| 3,150 W | Power Consumption | 3,300 W |
| 150.0 J/TH | Efficiency | 320.4 J/TH |
| 75 dB | Noise Level | — |
| 14.5 kg | Weight | 14.8 kg |
| 10,748 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 KS5 Pro
Thewindminer K9
Based on BTC price of $77,929 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer KS5 Pro wins on 6 of 6 factors (efficiency, hashrate, power consumption, home mining score, noise level, price-performance). The standout gap is 53% better efficiency (150 vs 320 J/TH) in the Antminer KS5 Pro's favour. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Antminer KS5 Pro and Thewindminer K9 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer KS5 Pro 104% more hashrate (21.0 vs 10.3 TH/s)
- Antminer KS5 Pro 5% better power draw (3,150 vs 3,300 W)
- Antminer KS5 Pro 53% better efficiency (150 vs 320 J/TH)
- Antminer KS5 Pro 2% better weight (14.5 vs 14.8 kg)
- Thewindminer K9 5% more heat output (10,748 vs 11,260 BTU/hr)
- Antminer KS5 Pro 64% more home mining score (36.0 vs 22.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer KS5 Pro | Metric | Thewindminer K9 |
|---|---|---|
| $15,000 | Upfront cost (MSRP) | $15,429 |
| -$6.81 | Daily net profit | -$7.55 |
| -$17,485 | Net after 1 year | -$18,185 |
| -$19,969 | Net after 2 years | -$20,941 |
| -$22,454 | 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 KS5 ProScore: 36/100. 75 dB noise level.
Best for Efficiency
Antminer KS5 Pro150.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer KS5 Pro vs Thewindminer K9: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer KS5 Pro is more profitable at $-6.81/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 Antminer KS5 Pro or Thewindminer K9?
The Antminer KS5 Pro 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 Antminer KS5 Pro or the Thewindminer K9?
The Antminer KS5 Pro 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.
What is the efficiency difference between Antminer KS5 Pro and Thewindminer K9?
The Antminer KS5 Pro 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).