Antminer S19 Pro+ vs Antminer S21
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer S21 is the stronger pick — New-generation efficiency surpasses even the peak of the previous generation. The Antminer S19 Pro+ runs 120.0 TH/s at 28 J/TH; the Antminer S21 runs 200.0 TH/s at 17.5 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
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 |
| 8/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S19 Pro+
Antminer S21
Based on BTC price of $64,258 and current network difficulty as of Jun 13, 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)
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 |
| -$4.58 | Daily net profit | -$2.59 |
| -$4,670 | Net after 1 year | -$6,444 |
| -$6,340 | Net after 2 years | -$7,388 |
| -$8,010 | Net after 3 years | -$8,332 |
| 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
TieBoth miners are equally suitable for home use.
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.