Antminer KS3 vs Bitmain Antminer S21e Hyd (310Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer KS3 | Specification | Bitmain Antminer S21e Hyd (310Th) |
|---|---|---|
| 9.4 TH/s | Hashrate | 310.0 TH/s |
| 3,500 W | Power Consumption | 5,270 W |
| 372.3 J/TH | Efficiency | 17.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 16.1 kg | Weight | 12.8 kg |
| 11,942 BTU/hr | BTU Output | 17,981 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer KS3
Bitmain Antminer S21e Hyd (310Th)
Based on BTC price of $79,034 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S21e Hyd (310Th) comes out ahead — it takes 3 of 5 (efficiency, hashrate, price-performance). The standout gap is 3198% more hashrate (9.4 vs 310.0 TH/s) in the Bitmain Antminer S21e Hyd (310Th)'s favour. That said, the Antminer KS3 isn't beaten everywhere — it still wins power consumption and home mining score. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Antminer KS3 and Bitmain Antminer S21e Hyd (310Th) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21e Hyd (310Th) 3198% more hashrate (9.4 vs 310.0 TH/s)
- Antminer KS3 34% better power draw (3,500 vs 5,270 W)
- Bitmain Antminer S21e Hyd (310Th) 95% better efficiency (372.3 vs 17.0 J/TH)
- Bitmain Antminer S21e Hyd (310Th) 20% better weight (16.1 vs 12.8 kg)
- Bitmain Antminer S21e Hyd (310Th) 51% more heat output (11,942 vs 17,981 BTU/hr)
- Antminer KS3 20% more home mining score (36.0 vs 30.0)
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 S21e Hyd (310Th) |
|---|---|---|
| $8,000 | Upfront cost (MSRP) | $1,679 |
| -$8.06 | Daily net profit | -$1.37 |
| -$10,941 | Net after 1 year | -$2,180 |
| -$13,882 | Net after 2 years | -$2,681 |
| -$16,824 | Net after 3 years | -$3,183 |
| 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
Bitmain Antminer S21e Hyd (310Th)17.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer KS3 vs Bitmain Antminer S21e Hyd (310Th): which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21e Hyd (310Th) is more profitable at $-1.37/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.
Which is quieter, the Antminer KS3 or Bitmain Antminer S21e Hyd (310Th)?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Antminer KS3 or Bitmain Antminer S21e Hyd (310Th)?
The Antminer KS3 scores 36/100 on our Home Mining Score (vs 30/100 for the Bitmain Antminer S21e Hyd (310Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer KS3 vs Bitmain Antminer S21e Hyd (310Th): how much does the efficiency gap matter?
The Antminer KS3 runs at 372.3 J/TH while the Bitmain Antminer S21e Hyd (310Th) runs at 17.0 J/TH — a difference of 355.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 95% better efficiency (372.3 vs 17.0 J/TH).