StrongU Hornbill H8 vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| StrongU Hornbill H8 | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 74.0 TH/s | Hashrate | 56.0 TH/s |
| 3,330 W | Power Consumption | 3,360 W |
| 45.0 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| 11,500.0 kg | Weight | 12,500.0 kg |
| 11,362 BTU/hr | BTU Output | 11,464 BTU/hr |
| 22/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| StrongU | Manufacturer | MicroBT |
Profitability Comparison
StrongU Hornbill H8
MicroBT Whatsminer M21S
Based on BTC price of $79,051 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Weighing six performance factors, the StrongU Hornbill H8 comes out ahead — it takes 3 of 4 (efficiency, hashrate, power consumption). Where it pulls away hardest is 25% better efficiency (45.0 vs 60.0 J/TH). That said, the MicroBT Whatsminer M21S isn't beaten everywhere — it still wins price-performance. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The StrongU Hornbill H8 and MicroBT Whatsminer M21S diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- StrongU Hornbill H8 32% more hashrate (74.0 vs 56.0 TH/s)
- StrongU Hornbill H8 1% better power draw (3,330 vs 3,360 W)
- StrongU Hornbill H8 25% better efficiency (45.0 vs 60.0 J/TH)
- StrongU Hornbill H8 8% better weight (11,500 vs 12,500 kg)
- MicroBT Whatsminer M21S 1% more heat output (11,362 vs 11,464 BTU/hr)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| StrongU Hornbill H8 | Metric | MicroBT Whatsminer M21S |
|---|---|---|
| $1,200 | Upfront cost (MSRP) | $650 |
| -$5.30 | Daily net profit | -$6.03 |
| -$3,135 | Net after 1 year | -$2,850 |
| -$5,069 | Net after 2 years | -$5,050 |
| -$7,004 | Net after 3 years | -$7,249 |
| 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
TieBoth miners are equally suitable for home use.
Best for Efficiency
StrongU Hornbill H845.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the StrongU Hornbill H8 or MicroBT Whatsminer M21S more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the StrongU Hornbill H8 is more profitable at $-5.30/day compared to $-6.03/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
StrongU Hornbill H8 vs MicroBT Whatsminer M21S: which runs at a lower noise level?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the StrongU Hornbill H8 or MicroBT Whatsminer M21S?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
StrongU Hornbill H8 vs MicroBT Whatsminer M21S: how much does the efficiency gap matter?
The StrongU Hornbill H8 runs at 45.0 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 15.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 25% better efficiency (45.0 vs 60.0 J/TH).