Antminer D7 vs Antminer S9j
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer D7 | Specification | Antminer S9j |
|---|---|---|
| 1,286.0 GH/s | Hashrate | 14.5 TH/s |
| 3,148 W | Power Consumption | 1,350 W |
| 2,447.9 J/TH | Efficiency | 93.1 J/TH |
| 70 dB | Noise Level | 76 dB |
| 14.4 kg | Weight | 4.2 kg |
| 10,741 BTU/hr | BTU Output | 4,606 BTU/hr |
| 36/100 | Home Mining Score | 83/100 |
| — | Release Year | — |
| X11 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer D7
Antminer S9j
Based on BTC price of $78,253 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Antminer S9j edges it: 4 of 5 factors go its way (efficiency, hashrate, power consumption, home mining score). Where it pulls away hardest is 96% better efficiency (2,447.9 vs 93.1 J/TH). The Antminer D7 claws back ground on noise level. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Here is every spec where the Antminer D7 and Antminer S9j actually differ, with the gap quantified:
- Antminer S9j 1028% more hashrate (1.3 vs 14.5 TH/s)
- Antminer S9j 57% better power draw (3,148 vs 1,350 W)
- Antminer S9j 96% better efficiency (2,447.9 vs 93.1 J/TH)
- Antminer D7 8% better noise (70.0 vs 76.0 dB)
- Antminer S9j 71% better weight (14.4 vs 4.2 kg)
- Antminer D7 133% more heat output (10,741 vs 4,606 BTU/hr)
- Antminer S9j 131% more home mining score (36.0 vs 83.0)
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 D7 | Metric | Antminer S9j |
|---|---|---|
| $2,500 | Upfront cost (MSRP) | — |
| -$7.51 | Daily net profit | -$2.72 |
| -$5,241 | Net after 1 year | -$992 |
| -$7,981 | Net after 2 years | -$1,984 |
| -$10,722 | Net after 3 years | -$2,976 |
| 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 S9jScore: 83/100. 76 dB noise level.
Best for Efficiency
Antminer S9j93.1 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer D7 vs Antminer S9j: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S9j is more profitable at $-2.72/day compared to $-7.51/day for the Antminer D7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer D7 or the Antminer S9j better for noise-sensitive spaces?
The Antminer D7 is quieter at 70 dB compared to the Antminer S9j at 76 dB. For home mining, lower noise levels make a significant difference in livability.
Antminer D7 vs Antminer S9j: which fits a residential setup better?
The Antminer S9j scores 83/100 on our Home Mining Score (vs 36/100 for the Antminer D7). 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 D7 and Antminer S9j?
The Antminer D7 runs at 2,447.9 J/TH while the Antminer S9j runs at 93.1 J/TH — a difference of 2,354.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 96% better efficiency (2,447.9 vs 93.1 J/TH).