Antminer S19j vs Bitmain T21 (190TH)
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19j | Specification | Bitmain T21 (190TH) |
|---|---|---|
| 90.0 TH/s | Hashrate | 190.0 TH/s |
| 3,100 W | Power Consumption | 3,610 W |
| 34.4 J/TH | Efficiency | 19.0 J/TH |
| 75 dB | Noise Level | 76 dB |
| 13.0 kg | Weight | 16.4 kg |
| 10,577 BTU/hr | BTU Output | 12,317 BTU/hr |
| 84/100 | Home Mining Score | 23/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S19j
Bitmain T21 (190TH)
Based on BTC price of $79,029 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the Bitmain T21 (190TH), which leads on 3 of 6 weighted factors (efficiency, hashrate, price-performance). Where it pulls away hardest is 111% more hashrate (90.0 vs 190.0 TH/s). The Antminer S19j claws back ground on power consumption and home mining score and noise level. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer S19j and Bitmain T21 (190TH) sit on each measurable spec:
- Bitmain T21 (190TH) 111% more hashrate (90.0 vs 190.0 TH/s)
- Antminer S19j 14% better power draw (3,100 vs 3,610 W)
- Bitmain T21 (190TH) 45% better efficiency (34.4 vs 19.0 J/TH)
- Antminer S19j 1% better noise (75.0 vs 76.0 dB)
- Antminer S19j 21% better weight (13.0 vs 16.4 kg)
- Bitmain T21 (190TH) 16% more heat output (10,577 vs 12,317 BTU/hr)
- Antminer S19j 265% more home mining score (84.0 vs 23.0)
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 S19j | Metric | Bitmain T21 (190TH) |
|---|---|---|
| $2,000 | Upfront cost (MSRP) | $1,700 |
| -$4.17 | Daily net profit | -$1.75 |
| -$3,521 | Net after 1 year | -$2,340 |
| -$5,042 | Net after 2 years | -$2,981 |
| -$6,563 | Net after 3 years | -$3,621 |
| 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 S19jScore: 84/100. 75 dB noise level.
Best for Efficiency
Bitmain T21 (190TH)19.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Antminer S19j or Bitmain T21 (190TH) more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain T21 (190TH) is more profitable at $-1.75/day compared to $-4.17/day for the Antminer S19j. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S19j or Bitmain T21 (190TH)?
The Antminer S19j 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.
Which is better for home mining, the Antminer S19j or Bitmain T21 (190TH)?
The Antminer S19j scores 84/100 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.
Antminer S19j vs Bitmain T21 (190TH): how much does the efficiency gap matter?
The Antminer S19j runs at 34.4 J/TH while the Bitmain T21 (190TH) runs at 19.0 J/TH — a difference of 15.4 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 45% better efficiency (34.4 vs 19.0 J/TH).