Antminer KS3 vs Bitmain Antminer S11 (20.5Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer S11 (20.5Th) |
|---|---|---|
| 9.4 TH/s | Hashrate | 20.5 TH/s |
| 3,500 W | Power Consumption | 1,530 W |
| 372.3 J/TH | Efficiency | 74.6 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 6,500.0 kg |
| 11,942 BTU/hr | BTU Output | 5,220 BTU/hr |
| 36/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer S11 (20.5Th)
Based on BTC price of $79,027 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S11 (20.5Th) comes out ahead — it takes 3 of 5 (efficiency, hashrate, power consumption). The standout gap is 80% better efficiency (372.3 vs 74.6 J/TH) in the Bitmain Antminer S11 (20.5Th)'s favour. The Antminer KS3 claws back ground on home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Antminer KS3 and Bitmain Antminer S11 (20.5Th) actually differ, with the gap quantified:
- Bitmain Antminer S11 (20.5Th) 118% more hashrate (9.4 vs 20.5 TH/s)
- Bitmain Antminer S11 (20.5Th) 56% better power draw (3,500 vs 1,530 W)
- Bitmain Antminer S11 (20.5Th) 80% better efficiency (372.3 vs 74.6 J/TH)
- Antminer KS3 100% better weight (16.1 vs 6,500.0 kg)
- Antminer KS3 129% more heat output (11,942 vs 5,220 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 S11 (20.5Th) |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | — |
| -$8.06 | Daily net profit | -$2.93 |
| -$10,941 | Net after 1 year | -$1,068 |
| -$13,882 | Net after 2 years | -$2,136 |
| -$16,824 | Net after 3 years | -$3,204 |
| 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 S11 (20.5Th)74.6 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer KS3 or Bitmain Antminer S11 (20.5Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S11 (20.5Th) is more profitable at $-2.93/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 S11 (20.5Th) better for noise-sensitive spaces?
The Antminer KS3 is quieter at 75 dB compared to the Bitmain Antminer S11 (20.5Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer KS3 vs Bitmain Antminer S11 (20.5Th): which fits a residential setup better?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 28/100 for the Bitmain Antminer S11 (20.5Th)). 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 S11 (20.5Th) on J/TH?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer S11 (20.5Th) runs at 74.6 J/TH — a difference of 297.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 80% better efficiency (372.3 vs 74.6 J/TH).