Antminer K7 vs Bitmain Antminer S21e Hyd (310Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S21e Hyd (310Th) |
|---|---|---|
| 63.5 TH/s | Hashrate | 310.0 TH/s |
| 3,080 W | Power Consumption | 5,270 W |
| 48.5 J/TH | Efficiency | 17.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.0 kg | Weight | 12.8 kg |
| 10,509 BTU/hr | BTU Output | 17,981 BTU/hr |
| 36/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S21e Hyd (310Th)
Based on BTC price of $79,034 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain Antminer S21e Hyd (310Th) comes out ahead — it takes 3 of 5 (efficiency, hashrate, price-performance). Where it pulls away hardest is 388% more hashrate (63.5 vs 310.0 TH/s). The Antminer K7 holds the edge in power consumption and home mining score. 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 K7 and Bitmain Antminer S21e Hyd (310Th) actually differ, with the gap quantified:
- Bitmain Antminer S21e Hyd (310Th) 388% more hashrate (63.5 vs 310.0 TH/s)
- Antminer K7 42% better power draw (3,080 vs 5,270 W)
- Bitmain Antminer S21e Hyd (310Th) 65% better efficiency (48.5 vs 17.0 J/TH)
- Bitmain Antminer S21e Hyd (310Th) 9% better weight (14.0 vs 12.8 kg)
- Bitmain Antminer S21e Hyd (310Th) 71% more heat output (10,509 vs 17,981 BTU/hr)
- Antminer K7 20% more home mining score (36.0 vs 30.0)
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 K7 | Metric | Bitmain Antminer S21e Hyd (310Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $1,679 |
| -$5.08 | Daily net profit | -$1.37 |
| -$5,355 | Net after 1 year | -$2,180 |
| -$7,210 | Net after 2 years | -$2,681 |
| -$9,065 | Net after 3 years | -$3,183 |
| 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 K7Score: 36/100. 75 dB noise level.
Best for Efficiency
Bitmain Antminer S21e Hyd (310Th)17.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Antminer K7 vs Bitmain Antminer S21e Hyd (310Th): which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21e Hyd (310Th) is more profitable at $-1.37/day compared to $-5.08/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer K7 vs Bitmain Antminer S21e Hyd (310Th): which runs at a lower noise level?
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 S21e Hyd (310Th)?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 30/100 for the Bitmain Antminer S21e Hyd (310Th)). 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 Bitmain Antminer S21e Hyd (310Th) on J/TH?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S21e Hyd (310Th) runs at 17.0 J/TH — a difference of 31.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 65% better efficiency (48.5 vs 17.0 J/TH).