Bitmain Antminer KS5 Pro (21Th) vs Goldshell E-KA1M
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer KS5 Pro (21Th) | Specification | Goldshell E-KA1M |
|---|---|---|
| 21.0 TH/s | Hashrate | 5.5 TH/s |
| 3,150 W | Power Consumption | 1,800 W |
| 150.0 J/TH | Efficiency | 327.3 J/TH |
| 75 dB | Noise Level | 50 dB |
| 15.8 kg | Weight | — |
| 10,748 BTU/hr | BTU Output | 6,142 BTU/hr |
| 36/100 | Home Mining Score | 56/100 |
| — | Release Year | — |
| KHeavyHash | Algorithm | KHeavyHash |
| Bitmain | Manufacturer | Goldshell |
Profitability Comparison
Bitmain Antminer KS5 Pro (21Th)
Goldshell E-KA1M
Based on BTC price of $78,139 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Antminer KS5 Pro (21Th) wins on 3 of 6 factors (efficiency, hashrate, price-performance). The standout gap is 282% more hashrate (21.0 vs 5.5 TH/s) in the Bitmain Antminer KS5 Pro (21Th)'s favour. The Goldshell E-KA1M holds the edge in power consumption and home mining score and noise level. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer KS5 Pro (21Th) and Goldshell E-KA1M actually differ, with the gap quantified:
- Bitmain Antminer KS5 Pro (21Th) 282% more hashrate (21.0 vs 5.5 TH/s)
- Goldshell E-KA1M 43% better power draw (3,150 vs 1,800 W)
- Bitmain Antminer KS5 Pro (21Th) 54% better efficiency (150 vs 327 J/TH)
- Goldshell E-KA1M 33% better noise (75.0 vs 50.0 dB)
- Bitmain Antminer KS5 Pro (21Th) 75% more heat output (10,748 vs 6,142 BTU/hr)
- Goldshell E-KA1M 56% more home mining score (36.0 vs 56.0)
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 KS5 Pro (21Th) | Metric | Goldshell E-KA1M |
|---|---|---|
| $860 | Upfront cost (MSRP) | $910 |
| -$6.80 | Daily net profit | -$4.12 |
| -$3,344 | Net after 1 year | -$2,415 |
| -$5,828 | Net after 2 years | -$3,919 |
| -$8,311 | Net after 3 years | -$5,424 |
| 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
Goldshell E-KA1MScore: 56/100. 50 dB noise level.
Best for Efficiency
Bitmain Antminer KS5 Pro (21Th)150.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Antminer KS5 Pro (21Th) or Goldshell E-KA1M more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Goldshell E-KA1M is more profitable at $-4.12/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 Bitmain Antminer KS5 Pro (21Th) or Goldshell E-KA1M?
The Goldshell E-KA1M is quieter at 50 dB compared to the Bitmain Antminer KS5 Pro (21Th) at 75 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitmain Antminer KS5 Pro (21Th) or the Goldshell E-KA1M?
The Goldshell E-KA1M scores 56/100 on our Home Mining Score (vs 36/100 for the Bitmain Antminer KS5 Pro (21Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer KS5 Pro (21Th) vs Goldshell E-KA1M: how much does the efficiency gap matter?
The Bitmain Antminer KS5 Pro (21Th) runs at 150.0 J/TH while the Goldshell E-KA1M runs at 327.3 J/TH — a difference of 177.3 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 54% better efficiency (150 vs 327 J/TH).