Antminer S19 Pro+ vs Antminer S21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S19 Pro+ | Specification | Antminer S21 |
|---|---|---|
| 120.0 TH/s | Hashrate | 200.0 TH/s |
| 3,360 W | Power Consumption | 3,500 W |
| 28.0 J/TH | Efficiency | 17.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 14.4 kg | Weight | 14.6 kg |
| 11,464 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 $77,954 and current network difficulty as of May 16, 2026. Actual results vary.
Verdict
The top-tier S19 Pro+ versus the base S21. Does the best of the old generation compete with the entry point of the new?
The S21 wins on efficiency despite the S19 Pro+ being the peak of its generation. New chip technology trumps old-generation optimization. The S19 Pro+ can be found at steep discounts, partially offsetting the efficiency gap.
Spec Deltas
Stripped to the numbers, this is how far apart the Antminer S19 Pro+ and Antminer S21 sit on each measurable spec:
- Antminer S21 67% more hashrate (120 vs 200 TH/s)
- Antminer S19 Pro+ 4% better power draw (3,360 vs 3,500 W)
- Antminer S21 38% better efficiency (28.0 vs 17.5 J/TH)
- Antminer S19 Pro+ 1% better weight (14.4 vs 14.6 kg)
- Antminer S21 4% more heat output (11,464 vs 11,942 BTU/hr)
- Antminer S19 Pro+ 133% more home mining score (84.0 vs 36.0)
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 S19 Pro+ | Metric | Antminer S21 |
|---|---|---|
| $3,000 | Upfront cost (MSRP) | $5,500 |
| -$3.76 | Daily net profit | -$1.23 |
| -$4,372 | Net after 1 year | -$5,947 |
| -$5,744 | Net after 2 years | -$6,395 |
| -$7,116 | Net after 3 years | -$6,842 |
| 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 S19 Pro+Score: 84/100. 75 dB noise level.
Best for Efficiency
Antminer S2117.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
How close is the S19 Pro+ to the S21 on efficiency?
The S19 Pro+ achieves roughly 23-25 J/TH versus the S21 at around 17.5 J/TH. The gap is meaningful but narrower than base S19 versus S21.
Is the S19 Pro+ a good value buy?
At used-market prices, the S19 Pro+ can offer competitive ROI due to its lower upfront cost. It remains profitable at moderate electricity rates.