Bitmain Antminer KS3 (8.3Th) vs Thewindminer K9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS3 (8.3Th) | Specification | Thewindminer K9 |
|---|---|---|
| 8.3 TH/s | Hashrate | 10.3 TH/s |
| 3,188 W | Power Consumption | 3,300 W |
| 384.1 J/TH | Efficiency | 320.4 J/TH |
| — | Noise Level | — |
| — | Weight | 14.8 kg |
| 10,878 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 (8.3Th)
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 Thewindminer K9 edges it: 2 of 4 factors go its way (efficiency, hashrate). The standout gap is 24% more hashrate (8.3 vs 10.3 TH/s) in the Thewindminer K9's favour. The Bitmain Antminer KS3 (8.3Th) claws back ground on power consumption and price-performance. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer KS3 (8.3Th) and Thewindminer K9 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Thewindminer K9 24% more hashrate (8.3 vs 10.3 TH/s)
- Bitmain Antminer KS3 (8.3Th) 3% better power draw (3,188 vs 3,300 W)
- Thewindminer K9 17% better efficiency (384 vs 320 J/TH)
- Thewindminer K9 4% more heat output (10,878 vs 11,260 BTU/hr)
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 KS3 (8.3Th) | Metric | Thewindminer K9 |
|---|---|---|
| $3,850 | Upfront cost (MSRP) | $15,429 |
| -$7.35 | Daily net profit | -$7.55 |
| -$6,534 | Net after 1 year | -$18,185 |
| -$9,218 | Net after 2 years | -$20,941 |
| -$11,902 | 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
Which makes more money, the Bitmain Antminer KS3 (8.3Th) or the Thewindminer K9?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer KS3 (8.3Th) is more profitable at $-7.35/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 KS3 (8.3Th) or Thewindminer K9?
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 (8.3Th) or Thewindminer K9?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
Bitmain Antminer KS3 (8.3Th) vs Thewindminer K9: how much does the efficiency gap matter?
The Bitmain Antminer KS3 (8.3Th) runs at 384.1 J/TH while the Thewindminer K9 runs at 320.4 J/TH — a difference of 63.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 17% better efficiency (384 vs 320 J/TH).