Antminer T21 vs GMO miner B3
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer T21 | Specification | GMO miner B3 |
|---|---|---|
| 190.0 TH/s | Taux de hachage | 33.0 TH/s |
| 3,610 W | Consommation électrique | 3,417 W |
| 19.0 J/TH | Efficiency | 103.6 J/TH |
| 75 dB | Niveau de bruit | — |
| 14.6 kg | Weight | 5,000.0 kg |
| 12,317 BTU/hr | BTU Output | 11,659 BTU/hr |
| 30/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | GMO miner |
Profitability Comparison
Antminer T21
GMO miner B3
Based on BTC price of $78,208 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Antminer T21, which leads on 4 of 5 weighted factors (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 476% more hashrate (190.0 vs 33.0 TH/s). That said, the GMO miner B3 isn't beaten everywhere — it still wins consommation électrique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Antminer T21 and GMO miner B3 actually differ, with the gap quantified:
- Antminer T21 476% more hashrate (190.0 vs 33.0 TH/s)
- GMO miner B3 5% better power draw (3,610 vs 3,417 W)
- Antminer T21 82% better efficacité (19.0 vs 103.6 J/TH)
- Antminer T21 100% better weight (14.6 vs 5,000.0 kg)
- Antminer T21 6% more heat output (12,317 vs 11,659 BTU/hr)
- Antminer T21 36% more score de minage domestique (30.0 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.
| Antminer T21 | Metric | GMO miner B3 |
|---|---|---|
| $4,200 | Upfront cost (MSRP) | — |
| -$1.83 | Daily net profit | -$7.01 |
| -$4,866 | Net after 1 year | -$2,560 |
| -$5,533 | Net after 2 years | -$5,120 |
| -$6,199 | Net after 3 years | -$7,679 |
| 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 T21Score: 30/100. 75 dB noise level.
Best for Efficiency
Antminer T2119.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer T21 or GMO miner B3 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Antminer T21 is more profitable at $-1.83/day compared to $-7.01/day for the GMO miner B3. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Antminer T21 or the GMO miner B3 better for noise-sensitive spaces?
The Antminer T21 is quieter at 75 dB compared to the GMO miner B3 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the Antminer T21 or GMO miner B3?
The Antminer T21 scores 30/100 on our Home Mining Score (vs 22/100 for the GMO miner B3). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
Antminer T21 vs GMO miner B3: how much does the efficiency gap matter?
The Antminer T21 runs at 19.0 J/TH while the GMO miner B3 runs at 103.6 J/TH — a difference of 84.6 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 82% better efficacité (19.0 vs 103.6 J/TH).