Bitdeer SealMiner A2 vs Bitmain T21 (190TH)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitdeer SealMiner A2 | Specification | Bitmain T21 (190TH) |
|---|---|---|
| 226.0 TH/s | Taux de hachage | 190.0 TH/s |
| 3,730 W | Consommation électrique | 3,610 W |
| 16.5 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Niveau de bruit | 76 dB |
| 15.5 kg | Weight | 16.4 kg |
| 12,727 BTU/hr | BTU Output | 12,317 BTU/hr |
| 30/100 | Home Mining Score | 23/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitdeer | Manufacturer | Bitmain |
Profitability Comparison
Bitdeer SealMiner A2
Bitmain T21 (190TH)
Based on BTC price of $78,143 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the Bitdeer SealMiner A2 edges it: 4 of 6 factors go its way (efficacité, hashrate, score de minage domestique, niveau sonore). The standout gap is 19% more hashrate (226 vs 190 TH/s) in the Bitdeer SealMiner A2's favour. The Bitmain T21 (190TH) holds the edge in consommation électrique and rapport qualité-prix. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitdeer SealMiner A2 and Bitmain T21 (190TH) diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitdeer SealMiner A2 19% more hashrate (226 vs 190 TH/s)
- Bitmain T21 (190TH) 3% better power draw (3,730 vs 3,610 W)
- Bitdeer SealMiner A2 13% better efficacité (16.5 vs 19.0 J/TH)
- Bitdeer SealMiner A2 1% better noise (75.0 vs 76.0 dB)
- Bitdeer SealMiner A2 5% better weight (15.5 vs 16.4 kg)
- Bitdeer SealMiner A2 3% more heat output (12,727 vs 12,317 BTU/hr)
- Bitdeer SealMiner A2 30% more score de minage domestique (30.0 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.
| Bitdeer SealMiner A2 | Metric | Bitmain T21 (190TH) |
|---|---|---|
| $2,760 | Upfront cost (MSRP) | $1,700 |
| -$0.83 | Daily net profit | -$1.83 |
| -$3,061 | Net after 1 year | -$2,369 |
| -$3,362 | Net after 2 years | -$3,037 |
| -$3,663 | Net after 3 years | -$3,706 |
| 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
Bitdeer SealMiner A2Score: 30/100. 75 dB noise level.
Best for Efficiency
Bitdeer SealMiner A216.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitdeer SealMiner A2 or the Bitmain T21 (190TH)?
At the current BTC price and a $0.10/kWh electricity rate, the Bitdeer SealMiner A2 is more profitable at $-0.83/day compared to $-1.83/day for the Bitmain T21 (190TH). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitdeer SealMiner A2 vs Bitmain T21 (190TH): which runs at a lower noise level?
The Bitdeer SealMiner A2 is quieter at 75 dB compared to the Bitmain T21 (190TH) at 76 dB. For home mining, lower noise levels make a significant difference in livability.
For mining at home, should I pick the Bitdeer SealMiner A2 or the Bitmain T21 (190TH)?
The Bitdeer SealMiner A2 scores 30/100 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 Bitdeer SealMiner A2 and Bitmain T21 (190TH)?
The Bitdeer SealMiner A2 runs at 16.5 J/TH while the Bitmain T21 (190TH) runs at 19.0 J/TH — a difference of 2.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 13% better efficacité (16.5 vs 19.0 J/TH).
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