Antminer KS3 vs Bitmain Antminer Z9
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer Z9 |
|---|---|---|
| 9.4 TH/s | Hashrate | 42.0 Ksol/s |
| 3,500 W | Power Consumption | 970 W |
| 372.3 J/TH | Efficiency | 23.1 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 4,700.0 kg |
| 11,942 BTU/hr | BTU Output | 3,310 BTU/hr |
| 36/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | Equihash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer Z9
Based on BTC price of $78,175 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer Z9, which leads on 3 of 5 weighted factors (efficiency, hashrate, power consumption). Its biggest concrete edge: 94% better efficiency (372.3 vs 23.1 J/TH). The Antminer KS3 holds the edge in 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 Z9 sit on each measurable spec:
- Bitmain Antminer Z9 347% more hashrate (9.4 vs 42.0 TH/s)
- Bitmain Antminer Z9 72% better power draw (3,500 vs 970 W)
- Bitmain Antminer Z9 94% better efficiency (372.3 vs 23.1 J/TH)
- Antminer KS3 100% better weight (16.1 vs 4,700.0 kg)
- Antminer KS3 261% more heat output (11,942 vs 3,310 BTU/hr)
- Antminer KS3 16% more home mining score (36.0 vs 31.0)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Antminer KS3 | Metric | Bitmain Antminer Z9 |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | — |
| -$8.06 | Daily net profit | -$0.82 |
| -$10,943 | Net after 1 year | -$298 |
| -$13,885 | Net after 2 years | -$596 |
| -$16,828 | Net after 3 years | -$895 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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 KS3Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer Z923.1 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer KS3 or the Bitmain Antminer Z9?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer Z9 is more profitable at $-0.82/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 Z9: which runs at a lower noise level?
The Antminer KS3 is quieter at 75 dB compared to the Bitmain Antminer Z9 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 Z9?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer Z9). 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 Z9 on J/TH?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer Z9 runs at 23.1 J/TH — a difference of 349.2 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 94% better efficiency (372.3 vs 23.1 J/TH).