Antminer K7 vs Bitmain Antminer KS5 Pro (21Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| 63.5 TH/s | Hashrate | 21.0 TH/s |
| 3,080 W | Power Consumption | 3,150 W |
| 48.5 J/TH | Efficiency | 150.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.0 kg | Weight | 15.8 kg |
| 10,509 BTU/hr | BTU Output | 10,748 BTU/hr |
| 36/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | KHeavyHash |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer KS5 Pro (21Th)
Based on BTC price of $78,208 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer K7, which leads on 3 of 4 weighted factors (efficiency, hashrate, power consumption). Where it pulls away hardest is 68% better efficiency (48.5 vs 150.0 J/TH). The Bitmain Antminer KS5 Pro (21Th) holds the edge in price-performance. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Here is every spec where the Antminer K7 and Bitmain Antminer KS5 Pro (21Th) actually differ, with the gap quantified:
- Antminer K7 202% more hashrate (63.5 vs 21.0 TH/s)
- Antminer K7 2% better power draw (3,080 vs 3,150 W)
- Antminer K7 68% better efficiency (48.5 vs 150.0 J/TH)
- Antminer K7 11% better weight (14.0 vs 15.8 kg)
- Bitmain Antminer KS5 Pro (21Th) 2% more heat output (10,509 vs 10,748 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 K7 | Metric | Bitmain Antminer KS5 Pro (21Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $860 |
| -$5.11 | Daily net profit | -$6.80 |
| -$5,364 | Net after 1 year | -$3,344 |
| -$7,228 | Net after 2 years | -$5,827 |
| -$9,092 | Net after 3 years | -$8,311 |
| 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 K748.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer K7 or Bitmain Antminer KS5 Pro (21Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer K7 is more profitable at $-5.11/day compared to $-6.80/day for the Bitmain Antminer KS5 Pro (21Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer K7 or Bitmain Antminer KS5 Pro (21Th)?
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 Bitmain Antminer KS5 Pro (21Th)?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between Antminer K7 and Bitmain Antminer KS5 Pro (21Th)?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer KS5 Pro (21Th) runs at 150.0 J/TH — a difference of 101.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 68% better efficiency (48.5 vs 150.0 J/TH).