Bitmain Antminer G2 vs Antminer K7
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer G2 | Specification | Antminer K7 |
|---|---|---|
| 220.0 MH/s | Hashrate | 63.5 TH/s |
| 1,200 W | Power Consumption | 3,080 W |
| 5,454,545.5 J/TH | Efficiency | 48.5 J/TH |
| — | Noise Level | 75 dB |
| 15,000.0 kg | Weight | 14.0 kg |
| 4,094 BTU/hr | BTU Output | 10,509 BTU/hr |
| 31/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| Etchash | Algorithm | Eaglesong |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer G2
Antminer K7
Based on BTC price of $78,226 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 4 of 5 weighted factors (efficiency, hashrate, home mining score, noise level). Where it pulls away hardest is 28863536% more hashrate (0.0 vs 63.5 TH/s). The Bitmain Antminer G2 holds the edge in power consumption. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer G2 and Antminer K7 sit on each measurable spec:
- Antminer K7 28863536% more hashrate (0.0 vs 63.5 TH/s)
- Bitmain Antminer G2 61% better power draw (1,200 vs 3,080 W)
- Antminer K7 100% better efficiency (5,454,545.5 vs 48.5 J/TH)
- Antminer K7 100% better weight (15,000.0 vs 14.0 kg)
- Antminer K7 157% more heat output (4,094 vs 10,509 BTU/hr)
- Antminer K7 16% more home mining score (31.0 vs 36.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Bitmain Antminer G2 | Metric | Antminer K7 |
|---|---|---|
| — | Upfront cost (MSRP) | $3,500 |
| -$2.88 | Daily net profit | -$5.11 |
| -$1,051 | Net after 1 year | -$5,364 |
| -$2,102 | Net after 2 years | -$7,227 |
| -$3,154 | Net after 3 years | -$9,091 |
| — | 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
Antminer K748.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer G2 or Antminer K7 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer G2 is more profitable at $-2.88/day compared to $-5.11/day for the Antminer K7. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer G2 vs Antminer K7: which runs at a lower noise level?
The Antminer K7 is quieter at 75 dB compared to the Bitmain Antminer G2 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer G2 or the Antminer K7?
The Antminer K7 scores 36/100 on our Home Mining Score (vs 31/100 for the Bitmain Antminer G2). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer G2 vs Antminer K7: how much does the efficiency gap matter?
The Bitmain Antminer G2 runs at 5,454,545.5 J/TH while the Antminer K7 runs at 48.5 J/TH — a difference of 5,454,497.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 100% better efficiency (5,454,545.5 vs 48.5 J/TH).