Antminer D9 vs Antminer T21
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer T21 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 T21 runs 190.0 TH/s.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| Antminer D9 | Specification | Antminer T21 |
|---|---|---|
| 1,770.0 GH/s | Taux de hachage | 190.0 TH/s |
| 2,839 W | Consommation électrique | 3,610 W |
| 1,604.0 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Niveau de bruit | 75 dB |
| 16.1 kg | Weight | 14.6 kg |
| 9,687 BTU/hr | BTU Output | 12,317 BTU/hr |
| 8/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| X11 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer D9
Antminer T21
Based on BTC price of $64,648 and current network difficulty as of Jun 17, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Antminer T21 edges it: 3 of 4 factors go its way (efficacité, hashrate, rapport qualité-prix). Where it pulls away hardest is 10634% more hashrate (1.8 vs 190.0 TH/s). The Antminer D9 holds the edge in consommation électrique. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer D9 and Antminer T21 sit on each measurable spec:
- Antminer T21 10634% more hashrate (1.8 vs 190.0 TH/s)
- Antminer D9 21% better power draw (2,839 vs 3,610 W)
- Antminer T21 99% better efficacité (1,604.0 vs 19.0 J/TH)
- Antminer T21 9% better weight (16.1 vs 14.6 kg)
- Antminer T21 27% more heat output (9,687 vs 12,317 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 T21 |
|---|---|---|
| $3,000 | Upfront cost (MSRP) | $4,200 |
| -$6.76 | Daily net profit | -$2.48 |
| -$5,466 | Net after 1 year | -$5,106 |
| -$7,932 | Net after 2 years | -$6,013 |
| -$10,398 | Net after 3 years | -$6,919 |
| 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 T2119.0 J/TH — lower electricity cost per terahash.
Foire aux questions
Is the Antminer D9 or Antminer T21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer T21 is more profitable at $-2.48/day compared to $-6.76/day for the Antminer D9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer D9 or the Antminer T21 better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Antminer D9 vs Antminer T21: 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 T21: how much does the efficiency gap matter?
The Antminer D9 runs at 1,604.0 J/TH while the Antminer T21 runs at 19.0 J/TH — a difference of 1,585.0 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 19.0 J/TH).