Bitmain Bitcoin Miner S19j XP vs MicroBT Whatsminer M21
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Bitcoin Miner S19j XP | Specification | MicroBT Whatsminer M21 |
|---|---|---|
| 151.0 TH/s | Hashrate | 31.0 TH/s |
| 3,247 W | Power Consumption | 1,860 W |
| 21.5 J/TH | Efficiency | 60.0 J/TH |
| — | Noise Level | — |
| — | Weight | 7,150.0 kg |
| 11,079 BTU/hr | BTU Output | 6,346 BTU/hr |
| 22/100 | Home Mining Score | 28/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Bitcoin Miner S19j XP
MicroBT Whatsminer M21
Based on BTC price of $66,291 and current network difficulty as of Mar 28, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the Bitmain Bitcoin Miner S19j XP wins on 2 of 4 factors (efficiency, hashrate). The MicroBT Whatsminer M21 holds the edge in power consumption and home mining score. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
MicroBT Whatsminer M21Score: 28/100. 0 dB noise level.
Best for Efficiency
Bitmain Bitcoin Miner S19j XP21.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Is the Bitmain Bitcoin Miner S19j XP or MicroBT Whatsminer M21 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Bitcoin Miner S19j XP is more profitable at $-3.09/day compared to $-3.50/day for the MicroBT Whatsminer M21. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Bitmain Bitcoin Miner S19j XP or MicroBT Whatsminer M21?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Which is better for home mining, the Bitmain Bitcoin Miner S19j XP or MicroBT Whatsminer M21?
The MicroBT Whatsminer M21 scores 28/100 on our Home Mining Score (vs 22/100 for the Bitmain Bitcoin Miner S19j XP). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
What is the efficiency difference between Bitmain Bitcoin Miner S19j XP and MicroBT Whatsminer M21?
The Bitmain Bitcoin Miner S19j XP runs at 21.5 J/TH while the MicroBT Whatsminer M21 runs at 60.0 J/TH — a difference of 38.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.