Antminer KS3 vs Bitmain Antminer Z15 Pro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer Z15 Pro |
|---|---|---|
| 9.4 TH/s | Hashrate | 840.0 Ksol/s |
| 3,500 W | Power Consumption | 2,780 W |
| 372.3 J/TH | Efficiency | 3.3 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 17.0 kg |
| 11,942 BTU/hr | BTU Output | 9,485 BTU/hr |
| 36/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer Z15 Pro
Based on BTC price of $78,167 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer Z15 Pro, which leads on 4 of 6 weighted factors (efficiency, hashrate, power consumption, price-performance). The standout gap is 99% better efficiency (372.3 vs 3.3 J/TH) in the Bitmain Antminer Z15 Pro's favour. That said, the Antminer KS3 isn't beaten everywhere — it still wins home mining score and noise level. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer KS3 and Bitmain Antminer Z15 Pro sit on each measurable spec:
- Bitmain Antminer Z15 Pro 8836% more hashrate (9.4 vs 840.0 TH/s)
- Bitmain Antminer Z15 Pro 21% better power draw (3,500 vs 2,780 W)
- Bitmain Antminer Z15 Pro 99% better efficiency (372.3 vs 3.3 J/TH)
- Antminer KS3 5% better weight (16.1 vs 17.0 kg)
- Antminer KS3 26% more heat output (11,942 vs 9,485 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 | Bitmain Antminer Z15 Pro |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $1,800 |
| -$8.06 | Daily net profit | $23.54 |
| -$10,943 | Net after 1 year | +$6,793 |
| -$13,885 | Net after 2 years | +$15,387 |
| -$16,828 | Net after 3 years | +$23,980 |
| Does not pay back at current rates (negative daily profit) | Payback period | Pays for itself in ~76 days at current rates |
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
Bitmain Antminer Z15 Pro$31.61/day higher profit at current rates.
Best for Home Mining
Antminer KS3Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z15 Pro3.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer KS3 or the Bitmain Antminer Z15 Pro?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z15 Pro is more profitable at $23.54/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.
Antminer KS3 vs Bitmain Antminer Z15 Pro: which runs at a lower noise level?
The Antminer KS3 is quieter at 75 dB compared to the Bitmain Antminer Z15 Pro at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer KS3 or the Bitmain Antminer Z15 Pro?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 22/100 for the Bitmain Antminer Z15 Pro). 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 KS3 and Bitmain Antminer Z15 Pro?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer Z15 Pro runs at 3.3 J/TH — a difference of 369.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 99% better efficiency (372.3 vs 3.3 J/TH).