Antminer K7 vs Bitmain Antminer S21+ Hyd (358Th)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer K7 | Specification | Bitmain Antminer S21+ Hyd (358Th) |
|---|---|---|
| 63.5 TH/s | Hashrate | 358.0 TH/s |
| 3,080 W | Power Consumption | 5,370 W |
| 48.5 J/TH | Efficiency | 15.0 J/TH |
| 75 dB | Noise Level | 50 dB |
| 14.0 kg | Weight | 12.8 kg |
| 10,509 BTU/hr | BTU Output | 18,322 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+ Hyd (358Th)
Based on BTC price of $79,027 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitmain Antminer S21+ Hyd (358Th) edges it: 5 of 6 factors go its way (efficiency, hashrate, home mining score, noise level, price-performance). Its biggest concrete edge: 464% more hashrate (63.5 vs 358.0 TH/s). The Antminer K7 claws back ground on power consumption. 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 S21+ Hyd (358Th) actually differ, with the gap quantified:
- Bitmain Antminer S21+ Hyd (358Th) 464% more hashrate (63.5 vs 358.0 TH/s)
- Antminer K7 43% better power draw (3,080 vs 5,370 W)
- Bitmain Antminer S21+ Hyd (358Th) 69% better efficiency (48.5 vs 15.0 J/TH)
- Bitmain Antminer S21+ Hyd (358Th) 33% better noise (75.0 vs 50.0 dB)
- Bitmain Antminer S21+ Hyd (358Th) 9% better weight (14.0 vs 12.8 kg)
- Bitmain Antminer S21+ Hyd (358Th) 74% more heat output (10,509 vs 18,322 BTU/hr)
- Bitmain Antminer S21+ Hyd (358Th) 22% more home mining score (36.0 vs 44.0)
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 S21+ Hyd (358Th) |
|---|---|---|
| $3,500 | Upfront cost (MSRP) | $2,757 |
| -$5.08 | Daily net profit | $0.13 |
| -$5,355 | Net after 1 year | -$2,709 |
| -$7,210 | Net after 2 years | -$2,661 |
| -$9,066 | Net after 3 years | -$2,613 |
| Does not pay back at current rates (negative daily profit) | Payback period | Takes ~57.5 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+ Hyd (358Th)$5.21/day higher profit at current rates.
Best for Home Mining
Bitmain Antminer S21+ Hyd (358Th)Score: 44/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer S21+ Hyd (358Th)15.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer K7 or Bitmain Antminer S21+ Hyd (358Th) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21+ Hyd (358Th) is more profitable at $0.13/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+ Hyd (358Th) better for noise-sensitive spaces?
The Bitmain Antminer S21+ Hyd (358Th) 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.
Antminer K7 vs Bitmain Antminer S21+ Hyd (358Th): which fits a residential setup better?
The Bitmain Antminer S21+ Hyd (358Th) 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.
Antminer K7 vs Bitmain Antminer S21+ Hyd (358Th): how much does the efficiency gap matter?
The Antminer K7 runs at 48.5 J/TH while the Bitmain Antminer S21+ Hyd (358Th) runs at 15.0 J/TH — a difference of 33.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 69% better efficiency (48.5 vs 15.0 J/TH).