Antminer S19j Pro vs Antminer S19k Pro
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the Antminer S19k Pro is the stronger pick — Best efficiency in the entire S19 family — the optimized farewell to the platform. The Antminer S19j Pro runs 104.0 TH/s at 29.5 J/TH; the Antminer S19k Pro runs 120.0 TH/s at 23 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| Antminer S19j Pro | Specification | Antminer S19k Pro |
|---|---|---|
| 104.0 TH/s | Hashrate | 120.0 TH/s |
| 3,068 W | Power Consumption | 2,760 W |
| 29.5 J/TH | Efficiency | 23.0 J/TH |
| 75 dB | Noise Level | 75 dB |
| 13.2 kg | Weight | 12.5 kg |
| 10,468 BTU/hr | BTU Output | 9,417 BTU/hr |
| 8/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | Bitmain |
Profitability Comparison
Antminer S19j Pro
Antminer S19k Pro
Based on BTC price of $60,487 and current network difficulty as of Jun 27, 2026. Actual results vary.
Verdict
The S19k Pro was Bitmain's last hurrah for the S19 platform, squeezing the most efficiency possible from the architecture before the S21 series launched.
The S19k Pro edges ahead with slightly better efficiency, making it the best of the S19 lineup. However, both are now one generation behind and face similar profitability challenges at higher electricity rates.
Spec Deltas
The Antminer S19j Pro and Antminer S19k Pro diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Antminer S19k Pro 15% more hashrate (104 vs 120 TH/s)
- Antminer S19k Pro 10% better power draw (3,068 vs 2,760 W)
- Antminer S19k Pro 22% better efficiency (29.5 vs 23.0 J/TH)
- Antminer S19k Pro 5% better weight (13.2 vs 12.5 kg)
- Antminer S19j Pro 11% more heat output (10,468 vs 9,417 BTU/hr)
Cost & ROI Over Time
Hardware cost is only half the story — here is how each miner's upfront price plays out against cumulative profit at a $0.10/kWh rate.
| Antminer S19j Pro | Metric | Antminer S19k Pro |
|---|---|---|
| $2,500 | Upfront cost (MSRP) | $2,800 |
| -$4.41 | Daily net profit | -$3.22 |
| -$4,109 | Net after 1 year | -$3,974 |
| -$5,719 | Net after 2 years | -$5,147 |
| -$7,328 | Net after 3 years | -$6,321 |
| 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 S19k Pro23.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the S19k Pro the best S19-series miner?
Yes, the S19k Pro achieves the best efficiency of any S19-family model. It represents the most refined version of the platform.
Should I buy an S19k Pro or jump to the S21?
The S21 is significantly more efficient and represents the current generation. An S19k Pro only makes sense if found at a steep discount or if you need parts-compatible hardware for an existing S19 fleet.