Antminer S19j Pro vs Antminer T21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19j Pro | Specification | Antminer T21 |
|---|---|---|
| 100.0 TH/s | Hashrate | 190.0 TH/s |
| 3,050 W | Power Consumption | 3,610 W |
| 30.5 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 13.2 kg | Weight | 14.6 kg |
| 10,407 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 S19j Pro
Antminer T21
Based on BTC price of $74,723 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
The S19 generation's top performer versus the S21 generation's budget option. A cross-generation matchup that tests whether a budget new miner beats a premium old one.
The T21 wins on efficiency despite being the economy option of its generation. New silicon beats old regardless of tier. However, the S19j Pro can be found much cheaper on the secondary market.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S19j ProScore: 84/100. 75 dB noise level.
Best for Efficiency
Antminer T2119.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is a used S19j Pro or a new T21 the better buy?
Depends on price. A very cheap S19j Pro can offer competitive ROI despite worse efficiency due to the lower capital outlay. Above $0.07/kWh electricity, the T21's efficiency makes it the safer long-term bet.
Which is better for space heating?
The S19j Pro draws more power and produces more heat, making it the better space heater. The T21 mines more BTC per watt consumed.