Antminer D9 vs Bitmain Antminer S21 Hyd (335Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer D9 | Specification | Bitmain Antminer S21 Hyd (335Th) |
|---|---|---|
| 1,770.0 GH/s | Hashrate | 335.0 TH/s |
| 2,839 W | Power Consumption | 5,360 W |
| 1,604.0 J/TH | Efficiency | 16.0 J/TH |
| 75 dB | Noise Level | — |
| 16.1 kg | Weight | 14.2 kg |
| 9,687 BTU/hr | BTU Output | 18,288 BTU/hr |
| 36/100 | Home Mining Score | 16/100 |
| — | Release Year | — |
| X11 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer D9
Bitmain Antminer S21 Hyd (335Th)
Based on BTC price of $79,078 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain Antminer S21 Hyd (335Th), which leads on 3 of 6 weighted factors (efficiency, hashrate, price-performance). Where it pulls away hardest is 18827% more hashrate (1.8 vs 335.0 TH/s). That said, the Antminer D9 isn't beaten everywhere — it still wins power consumption and home mining score and noise level. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer D9 and Bitmain Antminer S21 Hyd (335Th) sit on each measurable spec:
- Bitmain Antminer S21 Hyd (335Th) 18827% more hashrate (1.8 vs 335.0 TH/s)
- Antminer D9 47% better power draw (2,839 vs 5,360 W)
- Bitmain Antminer S21 Hyd (335Th) 99% better efficiency (1,604.0 vs 16.0 J/TH)
- Bitmain Antminer S21 Hyd (335Th) 12% better weight (16.1 vs 14.2 kg)
- Bitmain Antminer S21 Hyd (335Th) 89% more heat output (9,687 vs 18,288 BTU/hr)
- Antminer D9 125% more home mining score (36.0 vs 16.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Antminer D9 | Metric | Bitmain Antminer S21 Hyd (335Th) |
|---|---|---|
| $3,000 | Upfront cost (MSRP) | $3,999 |
| -$6.75 | Daily net profit | -$0.29 |
| -$5,463 | Net after 1 year | -$4,106 |
| -$7,925 | Net after 2 years | -$4,213 |
| -$10,388 | Net after 3 years | -$4,320 |
| 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 D9Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Hyd (335Th)16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer D9 or Bitmain Antminer S21 Hyd (335Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Hyd (335Th) is more profitable at $-0.29/day compared to $-6.75/day for the Antminer D9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer D9 vs Bitmain Antminer S21 Hyd (335Th): which runs at a lower noise level?
The Antminer D9 is quieter at 75 dB compared to the Bitmain Antminer S21 Hyd (335Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer D9 vs Bitmain Antminer S21 Hyd (335Th): which fits a residential setup better?
The Antminer D9 scores 36/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 Hyd (335Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Antminer D9 and Bitmain Antminer S21 Hyd (335Th)?
The Antminer D9 runs at 1,604.0 J/TH while the Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH — a difference of 1,588.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 99% better efficiency (1,604.0 vs 16.0 J/TH).