Antminer D9 vs Antminer S21+
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer S21+ is the stronger pick — it leads on 3 of 4 head-to-head factors. The Antminer D9 runs 1,770.0 GH/s; the Antminer S21+ runs 216.0 TH/s.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| Antminer D9 | Specification | Antminer S21+ |
|---|---|---|
| 1,770.0 GH/s | Taux de hachage | 216.0 TH/s |
| 2,839 W | Consommation électrique | 3,564 W |
| 1,604.0 J/TH | Efficiency | 16.5 J/TH |
| 75 dB | Niveau de bruit | 75 dB |
| 16.1 kg | Weight | 15.0 kg |
| 9,687 BTU/hr | BTU Output | 12,160 BTU/hr |
| 8/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| X11 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer D9
Antminer S21+
Based on BTC price of $65,917 and current network difficulty as of Jun 17, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer S21+, which leads on 3 of 4 weighted factors (efficacité, hashrate, rapport qualité-prix). Where it pulls away hardest is 12103% more hashrate (1.8 vs 216.0 TH/s). The Antminer D9 claws back ground on consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Antminer D9 and Antminer S21+ diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S21+ 12103% more hashrate (1.8 vs 216.0 TH/s)
- Antminer D9 20% better power draw (2,839 vs 3,564 W)
- Antminer S21+ 99% better efficacité (1,604.0 vs 16.5 J/TH)
- Antminer S21+ 7% better weight (16.1 vs 15.0 kg)
- Antminer S21+ 26% more heat output (9,687 vs 12,160 BTU/hr)
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 | Antminer S21+ |
|---|---|---|
| $3,000 | Upfront cost (MSRP) | $6,500 |
| -$6.75 | Daily net profit | -$1.39 |
| -$5,466 | Net after 1 year | -$7,007 |
| -$7,931 | Net after 2 years | -$7,514 |
| -$10,397 | Net after 3 years | -$8,021 |
| 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
Antminer S21+16.5 J/TH — lower electricity cost per terahash.
Foire aux questions
Is the Antminer D9 or Antminer S21+ more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S21+ is more profitable at $-1.39/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.
Which is quieter, the Antminer D9 or Antminer S21+?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Antminer D9 vs Antminer S21+: which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
Antminer D9 vs Antminer S21+: how much does the efficiency gap matter?
The Antminer D9 runs at 1,604.0 J/TH while the Antminer S21+ runs at 16.5 J/TH — a difference of 1,587.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 99% better efficacité (1,604.0 vs 16.5 J/TH).