MicroBT Whatsminer M21 vs MicroBT WhatsMiner M78S
Side-by-side specs, profitability, and home mining comparison.
Quick verdict
For most buyers the MicroBT WhatsMiner M78S is the stronger pick — it leads on 3 of 5 head-to-head factors. The MicroBT Whatsminer M21 runs 31.0 TH/s at 60 J/TH; the MicroBT WhatsMiner M78S runs 498.0 TH/s at 13.5 J/TH.
Specs verified against the D-Central Mining Bible \xc2\xb7 June 2026
Specifications Comparison
| MicroBT Whatsminer M21 | Specification | MicroBT WhatsMiner M78S |
|---|---|---|
| 31.0 TH/s | Taux de hachage | 498.0 TH/s |
| 1,860 W | Consommation électrique | 6,723 W |
| 60.0 J/TH | Efficiency | 13.5 J/TH |
| — | Niveau de bruit | 75 dB |
| 7.2 kg | Weight | 18.0 kg |
| 6,346 BTU/hr | BTU Output | 22,939 BTU/hr |
| 11/100 | Home Mining Score | 8/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| MicroBT | Manufacturer | MicroBT |
Profitability Comparison
MicroBT Whatsminer M21
MicroBT WhatsMiner M78S
Based on BTC price of $61,697 and current network difficulty as of Jun 25, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the MicroBT WhatsMiner M78S edges it: 3 of 5 factors go its way (efficacité, hashrate, niveau sonore). Where it pulls away hardest is 1506% more hashrate (31.0 vs 498.0 TH/s). The MicroBT Whatsminer M21 holds the edge in consommation électrique and score de minage domestique. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
Stripped to the numbers, this is how far apart the MicroBT Whatsminer M21 and MicroBT WhatsMiner M78S sit on each measurable spec:
- MicroBT WhatsMiner M78S 1506% more hashrate (31.0 vs 498.0 TH/s)
- MicroBT Whatsminer M21 72% better power draw (1,860 vs 6,723 W)
- MicroBT WhatsMiner M78S 78% better efficacité (60.0 vs 13.5 J/TH)
- MicroBT Whatsminer M21 60% better weight (7.2 vs 18.0 kg)
- MicroBT WhatsMiner M78S 261% more heat output (6,346 vs 22,939 BTU/hr)
- MicroBT Whatsminer M21 38% more score de minage domestique (11.0 vs 8.0)
Best For...
Best for Profitability
TieBoth miners produce similar daily profit.
Best for Home Mining
MicroBT Whatsminer M21Score: 11/100. 0 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M78S13.5 J/TH — lower electricity cost per terahash.
Foire aux questions
Which makes more money, the MicroBT Whatsminer M21 or the MicroBT WhatsMiner M78S?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M78S is more profitable at $-0.67/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.
Is the MicroBT Whatsminer M21 or the MicroBT WhatsMiner M78S better for noise-sensitive spaces?
The MicroBT WhatsMiner M78S 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.
For mining at home, should I pick the MicroBT Whatsminer M21 or the MicroBT WhatsMiner M78S?
The MicroBT Whatsminer M21 scores 11/100 on our Home Mining Score (vs 8/100 for the MicroBT WhatsMiner M78S). 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 M78S?
The MicroBT Whatsminer M21 runs at 60.0 J/TH while the MicroBT WhatsMiner M78S runs at 13.5 J/TH — a difference of 46.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 78% better efficacité (60.0 vs 13.5 J/TH).