Bitmain Antminer S21 Hyd (335Th) vs StrongU Hornbill H8 Pro
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Hyd (335Th) | Specification | StrongU Hornbill H8 Pro |
|---|---|---|
| 335.0 TH/s | Hashrate | 84.0 TH/s |
| 5,360 W | Power Consumption | 3,360 W |
| 16.0 J/TH | Efficiency | 40.0 J/TH |
| — | Noise Level | — |
| 14.2 kg | Weight | 11,500.0 kg |
| 18,288 BTU/hr | BTU Output | 11,464 BTU/hr |
| 16/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | StrongU |
Profitability Comparison
Bitmain Antminer S21 Hyd (335Th)
StrongU Hornbill H8 Pro
Based on BTC price of $79,063 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 (335Th) edges it: 2 of 4 factors go its way (efficiency, hashrate). The standout gap is 299% more hashrate (335.0 vs 84.0 TH/s) in the Bitmain Antminer S21 Hyd (335Th)'s favour. The StrongU Hornbill H8 Pro claws back ground on power consumption and home mining score. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
The Bitmain Antminer S21 Hyd (335Th) and StrongU Hornbill H8 Pro diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 Hyd (335Th) 299% more hashrate (335.0 vs 84.0 TH/s)
- StrongU Hornbill H8 Pro 37% better power draw (5,360 vs 3,360 W)
- Bitmain Antminer S21 Hyd (335Th) 60% better efficiency (16.0 vs 40.0 J/TH)
- Bitmain Antminer S21 Hyd (335Th) 100% better weight (14.2 vs 11,500.0 kg)
- Bitmain Antminer S21 Hyd (335Th) 60% more heat output (18,288 vs 11,464 BTU/hr)
- StrongU Hornbill H8 Pro 38% more home mining score (16.0 vs 22.0)
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.
| Bitmain Antminer S21 Hyd (335Th) | Metric | StrongU Hornbill H8 Pro |
|---|---|---|
| $3,999 | Upfront cost (MSRP) | — |
| -$0.68 | Daily net profit | -$5.01 |
| -$4,246 | Net after 1 year | -$1,828 |
| -$4,492 | Net after 2 years | -$3,656 |
| -$4,739 | Net after 3 years | -$5,484 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
StrongU Hornbill H8 ProScore: 22/100. 0 dB noise level.
Best for Efficiency
Bitmain Antminer S21 Hyd (335Th)16.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer S21 Hyd (335Th) or the StrongU Hornbill H8 Pro?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer S21 Hyd (335Th) is more profitable at $-0.68/day compared to $-5.01/day for the StrongU Hornbill H8 Pro. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer S21 Hyd (335Th) or the StrongU Hornbill H8 Pro better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Bitmain Antminer S21 Hyd (335Th) vs StrongU Hornbill H8 Pro: which fits a residential setup better?
The StrongU Hornbill H8 Pro scores 22/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 Hyd (335Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Bitmain Antminer S21 Hyd (335Th) vs StrongU Hornbill H8 Pro: how much does the efficiency gap matter?
The Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH while the StrongU Hornbill H8 Pro runs at 40.0 J/TH — a difference of 24.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 60% better efficiency (16.0 vs 40.0 J/TH).