MicroBT Whatsminer M21 vs MicroBT WhatsMiner M78
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | MicroBT WhatsMiner M78 |
|---|---|---|
| 31.0 TH/s | Hashrate | 464.0 TH/s |
| 1,860 W | Power Consumption | 6,728 W |
| 60.0 J/TH | Efficiency | 14.5 J/TH |
| — | Noise Level | 75 dB |
| 7,150.0 kg | Weight | 18.0 kg |
| 6,346 BTU/hr | BTU Output | 22,956 BTU/hr |
| 28/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
MicroBT WhatsMiner M78
Based on BTC price of $79,222 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT WhatsMiner M78 wins on 4 of 5 factors (efficiency, hashrate, home mining score, noise level). Its biggest concrete edge: 1397% more hashrate (31.0 vs 464.0 TH/s). That said, the MicroBT Whatsminer M21 isn't beaten everywhere — it still wins power consumption. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the MicroBT Whatsminer M21 and MicroBT WhatsMiner M78 actually differ, with the gap quantified:
- MicroBT WhatsMiner M78 1397% more hashrate (31.0 vs 464.0 TH/s)
- MicroBT Whatsminer M21 72% better power draw (1,860 vs 6,728 W)
- MicroBT WhatsMiner M78 76% better efficiency (60.0 vs 14.5 J/TH)
- MicroBT WhatsMiner M78 100% better weight (7,150.0 vs 18.0 kg)
- MicroBT WhatsMiner M78 262% more heat output (6,346 vs 22,956 BTU/hr)
- MicroBT WhatsMiner M78 7% more home mining score (28.0 vs 30.0)
Best For...
Best for Profitability
MicroBT WhatsMiner M78$4.60/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M78Score: 30/100. 75 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M7814.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
MicroBT Whatsminer M21 vs MicroBT WhatsMiner M78: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M78 is more profitable at $1.30/day compared to $-3.30/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 MicroBT Whatsminer M21 or MicroBT WhatsMiner M78?
The MicroBT WhatsMiner M78 is quieter at 75 dB compared to the MicroBT Whatsminer M21 at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Which is better for home mining, the MicroBT Whatsminer M21 or MicroBT WhatsMiner M78?
The MicroBT WhatsMiner M78 scores 30/100 on our Home Mining Score (vs 28/100 for the MicroBT Whatsminer M21). 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 MicroBT Whatsminer M21 and MicroBT WhatsMiner M78?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the MicroBT WhatsMiner M78 runs at 14.5 J/TH — a difference of 45.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 76% better efficiency (60.0 vs 14.5 J/TH).