Bitmain Antminer S19k Pro official 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 — New-generation chips deliver dramatically better efficiency than the cost-optimized S19k. The Bitmain Antminer S19k Pro official reference runs 120.0 TH/s at 23.0 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 S19k Pro official reference | Specification | Bitmain Antminer S21 official reference |
|---|---|---|
| 120.0 TH/s | Hashrate | 200.0 TH/s |
| 2,760 W | Power Consumption | 3,500 W |
| 23.0 J/TH | Efficiency | 17.5 J/TH |
| — | Noise Level | — |
| 12.9 kg | Weight | 15.4 kg |
| 9,417 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 S19k Pro official reference
Bitmain Antminer S21 official reference
Based on BTC price of $79,606 and current network difficulty as of Aug 28, 2026. Actual results vary.
Verdict
The S19k Pro was designed as a cost-optimized variant of the S19 generation. How does it stack up against the next-generation S21?
The S21 wins on efficiency by a wide margin. The S19k Pro was built for value, not peak performance, and the generational gap makes the difference even starker.
Spec Deltas
Here is every spec where the Bitmain Antminer S19k Pro official reference and Bitmain Antminer S21 official reference actually differ, with the gap quantified:
- Bitmain Antminer S21 official reference 67% more hashrate (120 vs 200 TH/s)
- Bitmain Antminer S19k Pro official reference 21% better power draw (2,760 vs 3,500 W)
- Bitmain Antminer S21 official reference 24% better efficiency (23.0 vs 17.5 J/TH)
- Bitmain Antminer S19k Pro official reference 17% better weight (12.9 vs 15.4 kg)
- Bitmain Antminer S21 official reference 27% more heat output (9,417 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
What made the S19k Pro different from other S19 models?
The S19k Pro used a different chip binning strategy to achieve lower manufacturing costs. It offers reasonable hashrate at a lower purchase price, trading some efficiency for affordability.
Is the S19k Pro worth buying at used-market prices?
Only at very cheap electricity. The efficiency gap versus the S21 makes the S19k Pro uncompetitive at most power rates.
Compare Bitmain Antminer S19k Pro official reference with...
Compare Bitmain Antminer S21 official reference with...
- Bitmain Antminer S21 official reference vs Bitmain Antminer S19j Pro multi-bin reference
- Bitmain Antminer S21 official reference vs Bitmain Antminer S21 Pro version 10 reference
- Bitmain Antminer S21 official reference vs Bitmain Antminer T21 model 10 dual-mode official reference
- Bitmain Antminer S21 official reference vs Bitmain Antminer S9 eight-bin OEM reference
- Bitmain Antminer S21 official reference vs MicroBT WhatsMiner M60S
- Bitmain Antminer S21 official reference vs Canaan AvalonMiner A1566 207T air-cooled OEM reference