Antminer S19 Pro vs Antminer S21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19 Pro | Specification | Antminer S21 |
|---|---|---|
| 110.0 TH/s | Hashrate | 200.0 TH/s |
| 3,250 W | Power Consumption | 3,500 W |
| 29.6 J/TH | Efficiency | 17.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.4 kg | Weight | 14.6 kg |
| 11,089 BTU/hr | BTU Output | 11,942 BTU/hr |
| 84/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S19 Pro
Antminer S21
Based on BTC price of $75,723 and current network difficulty as of Mar 17, 2026. Actual results vary.
Verdict
A direct generational leap from the S19 Pro to the S21. This comparison shows the real-world impact of advancing from one mining generation to the next.
The S21 offers roughly 40% better efficiency than the S19 Pro. This is a substantial improvement that dramatically affects profitability, especially at higher electricity rates. The S19 Pro is now a previous-gen workhorse heading toward end-of-life for profitable mining.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
Antminer S19 ProScore: 84/100. 75 dB noise level.
Best for Efficiency
Antminer S2117.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
When should I replace my S19 Pro with an S21?
When the S21's efficiency advantage generates enough extra profit to cover its purchase price within your acceptable ROI timeline. At rates above $0.08/kWh, the switch makes financial sense relatively quickly.
Can I use my S19 Pro power supply with an S21?
It depends on the specific PSU model and wattage rating. Both use similar power connections, but always verify the PSU output matches the S21's requirements. APW12 units typically work with both.