Antminer KS3 vs Bitmain Antminer L11 Pro (21Gh)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer L11 Pro (21Gh) |
|---|---|---|
| 9.4 TH/s | Hashrate | 21.0 GH/s |
| 3,500 W | Power Consumption | 3,612 W |
| 372.3 J/TH | Efficiency | 172,000.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 16.1 kg | Weight | — |
| 11,942 BTU/hr | BTU Output | 12,324 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | Scrypt |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer L11 Pro (21Gh)
Based on BTC price of $78,158 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer KS3 wins on 5 of 5 factors (efficiency, hashrate, power consumption, home mining score, price-performance). Where it pulls away hardest is 100% better efficiency (372 vs 172,000 J/TH). Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer KS3 and Bitmain Antminer L11 Pro (21Gh) sit on each measurable spec:
- Antminer KS3 44662% more hashrate (9.4 vs 0.0 TH/s)
- Antminer KS3 3% better power draw (3,500 vs 3,612 W)
- Antminer KS3 100% better efficiency (372 vs 172,000 J/TH)
- Bitmain Antminer L11 Pro (21Gh) 3% more heat output (11,942 vs 12,324 BTU/hr)
- Antminer KS3 20% more home mining score (36.0 vs 30.0)
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 L11 Pro (21Gh) |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $7,999 |
| -$8.06 | Daily net profit | -$8.67 |
| -$10,943 | Net after 1 year | -$11,163 |
| -$13,885 | Net after 2 years | -$14,327 |
| -$16,828 | Net after 3 years | -$17,491 |
| 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 KS3Score: 36/100. 75 dB noise level.
Best for Efficiency
Antminer KS3372.3 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer KS3 or Bitmain Antminer L11 Pro (21Gh) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer KS3 is more profitable at $-8.06/day compared to $-8.67/day for the Bitmain Antminer L11 Pro (21Gh). 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 L11 Pro (21Gh) better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Antminer KS3 vs Bitmain Antminer L11 Pro (21Gh): which fits a residential setup better?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 30/100 for the Bitmain Antminer L11 Pro (21Gh)). 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 L11 Pro (21Gh) on J/TH?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer L11 Pro (21Gh) runs at 172,000.0 J/TH — a difference of 171,627.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 100% better efficiency (372 vs 172,000 J/TH).