Antminer L9 vs BW L21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer L9 | Specification | BW L21 |
|---|---|---|
| 16,000.0 MH/s | Taux de hachage | 550.0 MH/s |
| 3,360 W | Consommation électrique | 950 W |
| 210,000.0 J/TH | Efficiency | 1,727,272.7 J/TH |
| 75 dB | Niveau de bruit | — |
| 14.8 kg | Weight | 5,750.0 kg |
| 11,464 BTU/hr | BTU Output | 3,241 BTU/hr |
| 36/100 | Home Mining Score | 31/100 |
| — | Release Year | — |
| Scrypt | Algorithme | Scrypt |
| Bitmain | Manufacturer | BW |
Profitability Comparison
Antminer L9
BW L21
Based on BTC price of $78,233 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Antminer L9 comes out ahead — it takes 4 of 5 (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 2809% more hashrate (0.0 vs 0.0 TH/s). That said, the BW L21 isn't beaten everywhere — it still wins consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
The Antminer L9 and BW L21 diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer L9 2809% more hashrate (0.0 vs 0.0 TH/s)
- BW L21 72% better power draw (3,360 vs 950 W)
- Antminer L9 88% better efficacité (210,000 vs 1,727,273 J/TH)
- Antminer L9 100% better weight (14.8 vs 5,750.0 kg)
- Antminer L9 254% more heat output (11,464 vs 3,241 BTU/hr)
- Antminer L9 16% more score de minage domestique (36.0 vs 31.0)
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.
| Antminer L9 | Metric | BW L21 |
|---|---|---|
| $6,500 | Upfront cost (MSRP) | — |
| -$8.06 | Daily net profit | -$2.28 |
| -$9,443 | Net after 1 year | -$832 |
| -$12,386 | Net after 2 years | -$1,664 |
| -$15,329 | Net after 3 years | -$2,497 |
| 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
Antminer L9Score: 36/100. 75 dB noise level.
Best for Efficiency
Antminer L9210,000.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer L9 or BW L21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the BW L21 is more profitable at $-2.28/day compared to $-8.06/day for the Antminer L9. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Antminer L9 vs BW L21: which runs at a lower noise level?
The Antminer L9 is quieter at 75 dB compared to the BW L21 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer L9 or BW L21?
The Antminer L9 scores 36/100 on our Home Mining Score (vs 31/100 for the BW L21). 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 L9 and BW L21 on J/TH?
The Antminer L9 runs at 210,000.0 J/TH while the BW L21 runs at 1,727,272.7 J/TH — a difference of 1,517,272.7 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 88% better efficacité (210,000 vs 1,727,273 J/TH).