Antminer K7 vs Antminer S19j
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Antminer S19j |
|---|---|---|
| 63.5 TH/s | Hashrate | 90.0 TH/s |
| 3,080 W | Power Consumption | 3,100 W |
| 48.5 J/TH | Efficiency | 34.4 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.0 kg | Weight | 13.0 kg |
| 10,509 BTU/hr | BTU Output | 10,577 BTU/hr |
| 36/100 | Home Mining Score | 84/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Antminer S19j
Based on BTC price of $76,862 and current network difficulty as of May 18, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Antminer S19j wins on 4 of 5 factors (efficiency, hashrate, home mining score, price-performance). Its biggest concrete edge: 42% more hashrate (63.5 vs 90.0 TH/s). The Antminer K7 holds the edge in power consumption. Cross-check the spec deltas and operating-cost table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Antminer K7 and Antminer S19j actually differ, with the gap quantified:
- Antminer S19j 42% more hashrate (63.5 vs 90.0 TH/s)
- Antminer K7 1% better power draw (3,080 vs 3,100 W)
- Antminer S19j 29% better efficiency (48.5 vs 34.4 J/TH)
- Antminer S19j 7% better weight (14.0 vs 13.0 kg)
- Antminer S19j 1% more heat output (10,509 vs 10,577 BTU/hr)
- Antminer S19j 133% more home mining score (36.0 vs 84.0)
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 K7 | Metric | Antminer S19j |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $2,000 |
| -$5.15 | Daily net profit | -$4.26 |
| -$5,378 | Net after 1 year | -$3,554 |
| -$7,257 | Net after 2 years | -$5,107 |
| -$9,135 | Net after 3 years | -$6,661 |
| 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 S19jScore: 84/100. 75 dB noise level.
Best for Efficiency
Antminer S19j34.4 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer K7 or the Antminer S19j?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer S19j is more profitable at $-4.26/day compared to $-5.15/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer K7 or the Antminer S19j better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the Antminer K7 or the Antminer S19j?
The Antminer S19j scores 84/100 on our Home Mining Score (vs 36/100 for the Antminer K7). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Antminer K7 and Antminer S19j on J/TH?
The Antminer K7 runs at 48.5 J/TH while the Antminer S19j runs at 34.4 J/TH — a difference of 14.1 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 29% better efficiency (48.5 vs 34.4 J/TH).