Antminer KS3 vs Bitmain Antminer Z15
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer Z15 |
|---|---|---|
| 9.4 TH/s | Hashrate | 420.0 Ksol/s |
| 3,500 W | Power Consumption | 1,510 W |
| 372.3 J/TH | Efficiency | 3.6 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 9,000.0 kg |
| 11,942 BTU/hr | BTU Output | 5,152 BTU/hr |
| 36/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer Z15
Based on BTC price of $78,179 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer Z15 comes out ahead — it takes 4 of 6 (efficiency, hashrate, power consumption, price-performance). Where it pulls away hardest is 99% better efficiency (372.3 vs 3.6 J/TH). That said, the Antminer KS3 isn't beaten everywhere — it still wins home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Antminer KS3 and Bitmain Antminer Z15 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer Z15 4368% more hashrate (9.4 vs 420.0 TH/s)
- Bitmain Antminer Z15 57% better power draw (3,500 vs 1,510 W)
- Bitmain Antminer Z15 99% better efficiency (372.3 vs 3.6 J/TH)
- Antminer KS3 100% better weight (16.1 vs 9,000.0 kg)
- Antminer KS3 132% more heat output (11,942 vs 5,152 BTU/hr)
- Antminer KS3 29% more home mining score (36.0 vs 28.0)
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 KS3 | Metric | Bitmain Antminer Z15 |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $998 |
| -$8.06 | Daily net profit | $11.49 |
| -$10,943 | Net after 1 year | +$3,194 |
| -$13,885 | Net after 2 years | +$7,387 |
| -$16,828 | Net after 3 years | +$11,579 |
| Does not pay back at current rates (negative daily profit) | Payback period | Pays for itself in ~87 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$19.55/day higher profit at current rates.
Best for Home Mining
Antminer KS3Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z153.6 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer KS3 or the Bitmain Antminer Z15?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z15 is more profitable at $11.49/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.
Is the Antminer KS3 or the Bitmain Antminer Z15 better for noise-sensitive spaces?
The Antminer KS3 is quieter at 75 dB compared to the Bitmain Antminer Z15 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer KS3 vs Bitmain Antminer Z15: which fits a residential setup better?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer Z15). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer KS3 and Bitmain Antminer Z15 on J/TH?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer Z15 runs at 3.6 J/TH — a difference of 368.7 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 3.6 J/TH).