Antminer T19 vs Antminer T21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer T19 | Specification | Antminer T21 |
|---|---|---|
| 84.0 TH/s | Hashrate | 190.0 TH/s |
| 3,150 W | Power Consumption | 3,610 W |
| 37.5 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.4 kg | Weight | 14.6 kg |
| 10,748 BTU/hr | BTU Output | 12,317 BTU/hr |
| 84/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer T19
Antminer T21
Based on BTC price of $77,954 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
Bitmain's T-series offers budget-friendly entry into each generation. The T19 served the S19 era, while the T21 is the current-gen economy option.
The T21 is a full generational leap ahead in efficiency. The T19 only makes sense at extremely low purchase prices or for heating applications where raw wattage matters more than efficiency.
Spec Deltas
Here is every spec where the Antminer T19 and Antminer T21 actually differ, with the gap quantified:
- Antminer T21 126% more hashrate (84.0 vs 190.0 TH/s)
- Antminer T19 13% better power draw (3,150 vs 3,610 W)
- Antminer T21 49% better efficiency (37.5 vs 19.0 J/TH)
- Antminer T19 1% better weight (14.4 vs 14.6 kg)
- Antminer T21 15% more heat output (10,748 vs 12,317 BTU/hr)
- Antminer T19 180% more home mining score (84.0 vs 30.0)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer T19 | Metric | Antminer T21 |
|---|---|---|
| $1,800 | Upfront cost (MSRP) | $4,200 |
| -$4.55 | Daily net profit | -$1.85 |
| -$3,460 | Net after 1 year | -$4,875 |
| -$5,119 | Net after 2 years | -$5,549 |
| -$6,779 | Net after 3 years | -$6,224 |
| 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
Antminer T19Score: 84/100. 75 dB noise level.
Best for Efficiency
Antminer T2119.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the T21 a good first miner?
Yes. The T21 offers current-gen efficiency at a lower entry price than the S21. It is an excellent choice for miners who want modern performance without the flagship price.
Can D-Central repair both the T19 and T21?
Yes. D-Central provides board-level repair for the full Antminer lineup including both T-series models.