Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M78
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Hyd (335Th) | Specification | MicroBT WhatsMiner M78 |
|---|---|---|
| 335.0 TH/s | Taux de hachage | 464.0 TH/s |
| 5,360 W | Consommation électrique | 6,728 W |
| 16.0 J/TH | Efficiency | 14.5 J/TH |
| — | Niveau de bruit | 75 dB |
| 14.2 kg | Weight | 18.0 kg |
| 18,288 BTU/hr | BTU Output | 22,956 BTU/hr |
| 16/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 Hyd (335Th)
MicroBT WhatsMiner M78
Based on BTC price of $78,128 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the MicroBT WhatsMiner M78, which leads on 4 of 5 weighted factors (efficacité, hashrate, score de minage domestique, niveau sonore). Where it pulls away hardest is 39% more hashrate (335 vs 464 TH/s). The Bitmain Antminer S21 Hyd (335Th) holds the edge in consommation électrique. Review the detailed specs and profitability calculations above to determine which miner best fits your specific setup.
Spec Deltas
Stripped to the numbers, this is how far apart the Bitmain Antminer S21 Hyd (335Th) and MicroBT WhatsMiner M78 sit on each measurable spec:
- MicroBT WhatsMiner M78 39% more hashrate (335 vs 464 TH/s)
- Bitmain Antminer S21 Hyd (335Th) 20% better power draw (5,360 vs 6,728 W)
- MicroBT WhatsMiner M78 9% better efficacité (16.0 vs 14.5 J/TH)
- Bitmain Antminer S21 Hyd (335Th) 21% better weight (14.2 vs 18.0 kg)
- MicroBT WhatsMiner M78 26% more heat output (18,288 vs 22,956 BTU/hr)
- MicroBT WhatsMiner M78 88% more score de minage domestique (16.0 vs 30.0)
Cost & ROI Over Time
A miner pays for itself in profit, not specs. These projections track upfront cost against one, two and three years of net earnings at $0.10/kWh.
| Bitmain Antminer S21 Hyd (335Th) | Metric | MicroBT WhatsMiner M78 |
|---|---|---|
| $3,999 | Upfront cost (MSRP) | — |
| -$0.82 | Daily net profit | $0.54 |
| -$4,298 | Net after 1 year | +$195 |
| -$4,597 | Net after 2 years | +$391 |
| -$4,897 | Net after 3 years | +$586 |
| Does not pay back at current rates (negative daily profit) | Payback period | — |
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
MicroBT WhatsMiner M78$1.35/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
Is the Bitmain Antminer S21 Hyd (335Th) or MicroBT WhatsMiner M78 more profitable?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M78 is more profitable at $0.54/day compared to $-0.82/day for the Bitmain Antminer S21 Hyd (335Th). Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M78: which runs at a lower noise level?
The MicroBT WhatsMiner M78 is quieter at 75 dB compared to the Bitmain Antminer S21 Hyd (335Th) at 0 dB. For home mining, lower noise levels make a significant difference in livability.
Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M78: which fits a residential setup better?
The MicroBT WhatsMiner M78 scores 30/100 on our Home Mining Score (vs 16/100 for the Bitmain Antminer S21 Hyd (335Th)). This composite score factors in noise, power requirements, heat output, size, and setup ease — all critical for residential mining.
How far apart are the Bitmain Antminer S21 Hyd (335Th) and MicroBT WhatsMiner M78 on J/TH?
The Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH while the MicroBT WhatsMiner M78 runs at 14.5 J/TH — a difference of 1.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 9% better efficacité (16.0 vs 14.5 J/TH).