Canaan AvalonMiner 921 vs Bitmain T21 (190TH)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Canaan AvalonMiner 921 | Specification | Bitmain T21 (190TH) |
|---|---|---|
| 20.0 TH/s | Taux de hachage | 190.0 TH/s |
| 1,700 W | Consommation électrique | 3,610 W |
| 85.0 J/TH | Efficiency | 19.0 J/TH |
| — | Niveau de bruit | 76 dB |
| — | Weight | 16.4 kg |
| 5,800 BTU/hr | BTU Output | 12,317 BTU/hr |
| 28/100 | Home Mining Score | 23/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Canaan | Manufacturer | Bitmain |
Profitability Comparison
Canaan AvalonMiner 921
Bitmain T21 (190TH)
Based on BTC price of $78,179 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Weighing six performance factors, the Bitmain T21 (190TH) comes out ahead — it takes 3 of 5 (efficacité, hashrate, niveau sonore). The standout gap is 850% more hashrate (20.0 vs 190.0 TH/s) in the Bitmain T21 (190TH)'s favour. The Canaan AvalonMiner 921 holds the edge in consommation électrique and score de minage domestique. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the Canaan AvalonMiner 921 and Bitmain T21 (190TH) sit on each measurable spec:
- Bitmain T21 (190TH) 850% more hashrate (20.0 vs 190.0 TH/s)
- Canaan AvalonMiner 921 53% better power draw (1,700 vs 3,610 W)
- Bitmain T21 (190TH) 78% better efficacité (85.0 vs 19.0 J/TH)
- Bitmain T21 (190TH) 112% more heat output (5,800 vs 12,317 BTU/hr)
- Canaan AvalonMiner 921 22% more score de minage domestique (28.0 vs 23.0)
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.
| Canaan AvalonMiner 921 | Metric | Bitmain T21 (190TH) |
|---|---|---|
| — | Upfront cost (MSRP) | $1,700 |
| -$3.36 | Daily net profit | -$1.83 |
| -$1,227 | Net after 1 year | -$2,367 |
| -$2,453 | Net after 2 years | -$3,035 |
| -$3,680 | Net after 3 years | -$3,702 |
| — | 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
Canaan AvalonMiner 921Score: 28/100. 0 dB noise level.
Best for Efficiency
Bitmain T21 (190TH)19.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Canaan AvalonMiner 921 or the Bitmain T21 (190TH)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain T21 (190TH) is more profitable at $-1.83/day compared to $-3.36/day for the Canaan AvalonMiner 921. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Canaan AvalonMiner 921 or the Bitmain T21 (190TH) better for noise-sensitive spaces?
The Bitmain T21 (190TH) is quieter at 76 dB compared to the Canaan AvalonMiner 921 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Canaan AvalonMiner 921 or Bitmain T21 (190TH)?
The Canaan AvalonMiner 921 scores 28/100 on our Home Mining Score (vs 23/100 for the Bitmain T21 (190TH)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Canaan AvalonMiner 921 and Bitmain T21 (190TH)?
The Canaan AvalonMiner 921 runs at 85.0 J/TH while the Bitmain T21 (190TH) runs at 19.0 J/TH — a difference of 66.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 78% better efficacité (85.0 vs 19.0 J/TH).