Antminer K7 vs Bitmain Antminer S21 XP Hyd
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S21 XP Hyd |
|---|---|---|
| 63.5 TH/s | Hashrate | 473.0 TH/s |
| 3,080 W | Power Consumption | 5,676 W |
| 48.5 J/TH | Efficiency | 12.0 J/TH |
| 75 dB | Noise Level | 50 dB |
| 14.0 kg | Weight | 12.3 kg |
| 10,509 BTU/hr | BTU Output | 19,367 BTU/hr |
| 36/100 | Home Mining Score | 44/100 |
| — | Release Year | — |
| Eaglesong | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer K7
Bitmain Antminer S21 XP Hyd
Based on BTC price of $79,091 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer S21 XP Hyd wins on 5 of 6 factors (efficiency, hashrate, home mining score, noise level, price-performance). Its biggest concrete edge: 645% more hashrate (63.5 vs 473.0 TH/s). That said, the Antminer K7 isn't beaten everywhere — it still wins power consumption. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer K7 and Bitmain Antminer S21 XP Hyd sit on each measurable spec:
- Bitmain Antminer S21 XP Hyd 645% more hashrate (63.5 vs 473.0 TH/s)
- Antminer K7 46% better power draw (3,080 vs 5,676 W)
- Bitmain Antminer S21 XP Hyd 75% better efficiency (48.5 vs 12.0 J/TH)
- Bitmain Antminer S21 XP Hyd 33% better noise (75.0 vs 50.0 dB)
- Bitmain Antminer S21 XP Hyd 12% better weight (14.0 vs 12.3 kg)
- Bitmain Antminer S21 XP Hyd 84% more heat output (10,509 vs 19,367 BTU/hr)
- Bitmain Antminer S21 XP Hyd 22% more home mining score (36.0 vs 44.0)
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.
| Antminer K7 | Metric | Bitmain Antminer S21 XP Hyd |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $5,099 |
| -$5.08 | Daily net profit | $3.59 |
| -$5,355 | Net after 1 year | -$3,788 |
| -$7,209 | Net after 2 years | -$2,476 |
| -$9,064 | Net after 3 years | -$1,165 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~3.9 years to pay back at current rates |
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
Bitmain Antminer S21 XP Hyd$8.67/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21 XP HydScore: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21 XP Hyd12.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Antminer K7 or the Bitmain Antminer S21 XP Hyd?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 XP Hyd is more profitable at $3.59/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.
Is the Antminer K7 or the Bitmain Antminer S21 XP Hyd better for noise-sensitive spaces?
The Bitmain Antminer S21 XP Hyd is quieter at 50 dB compared to the Antminer K7 at 75 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Antminer K7 or the Bitmain Antminer S21 XP Hyd?
The Bitmain Antminer S21 XP Hyd scores 44/100 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 Bitmain Antminer S21 XP Hyd on J/TH?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S21 XP Hyd runs at 12.0 J/TH — a difference of 36.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 75% better efficiency (48.5 vs 12.0 J/TH).