Bitmain Antminer S19j Pro multi-bin reference vs Bitmain Antminer S21 official reference
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Bitmain Antminer S21 official reference is the stronger pick — 43% better efficiency means dramatically lower operating costs. The Bitmain Antminer S19j Pro multi-bin reference runs 84.0 TH/s at 29.5 J/TH; the Bitmain Antminer S21 official reference runs 200.0 TH/s at 17.5 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 August 2026
Specifications Comparison
| Bitmain Antminer S19j Pro multi-bin reference | Specification | Bitmain Antminer S21 official reference |
|---|---|---|
| 84.0 TH/s | Hashrate | 200.0 TH/s |
| 2,478 W | Power Consumption | 3,500 W |
| 29.5 J/TH | Efficiency | 17.5 J/TH |
| — | Noise Level | — |
| 14.6 kg | Weight | 15.4 kg |
| 8,455 BTU/hr | BTU Output | 11,942 BTU/hr |
| — | Home Mining Score | — |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Bitmain Antminer S19j Pro multi-bin reference
Bitmain Antminer S21 official reference
Based on BTC price of $79,924 and current network difficulty as of Aug 28, 2026. Actual results vary.
Verdict
The S19j Pro was the workhorse of the 2021-2023 mining era, while the S21 represents Bitmain's current generation. This comparison reveals whether upgrading makes financial sense for home and commercial miners.
The S21 wins decisively on efficiency (17.5 J/TH vs 29.5 J/TH), producing more hashrate for less power. However, the S19j Pro's lower second-hand price makes it competitive for miners with cheap electricity, and its higher heat output is an advantage for space heating applications.
Spec Deltas
The Bitmain Antminer S19j Pro multi-bin reference and Bitmain Antminer S21 official reference diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 official reference 138% more hashrate (84.0 vs 200.0 TH/s)
- Bitmain Antminer S19j Pro multi-bin reference 29% better power draw (2,478 vs 3,500 W)
- Bitmain Antminer S21 official reference 41% better efficiency (29.5 vs 17.5 J/TH)
- Bitmain Antminer S19j Pro multi-bin reference 5% better weight (14.6 vs 15.4 kg)
- Bitmain Antminer S21 official reference 41% more heat output (8,455 vs 11,942 BTU/hr)
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
Bitmain Antminer S21 official reference17.5 J/TH — lower electricity cost per unit of hashrate.
Frequently Asked Questions
Is the Antminer S21 worth the upgrade from the S19j Pro?
If your electricity rate is above $0.08/kWh, the S21's efficiency advantage will typically pay for itself within 6-12 months. Below that rate, the S19j Pro remains highly profitable and may be the better value.
Can the Antminer S19j Pro still be profitable in 2026?
Yes, at electricity rates below $0.06/kWh the S19j Pro remains profitable. It is also popular as a space heater since its higher power consumption generates more BTUs for home heating.
Which is better for home heating, the S21 or S19j Pro?
The S19j Pro produces more BTUs per hour due to its higher power consumption (3068W vs 3500W for the S21). However, the S21 mines more BTC per BTU of heat, making it more cost-effective as a dual-purpose heater-miner.
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