Antminer S21 XP vs MicroBT WhatsMiner M78S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Antminer S21 XP | Specification | MicroBT WhatsMiner M78S |
|---|---|---|
| 270.0 TH/s | Hashrate | 498.0 TH/s |
| 3,645 W | Power Consumption | 6,723 W |
| 13.5 J/TH | Efficiency | 13.5 J/TH |
| 75 dB | Noise Level | 75 dB |
| 15.4 kg | Weight | 18.0 kg |
| 12,437 BTU/hr | BTU Output | 22,939 BTU/hr |
| 30/100 | Home Mining Score | 30/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Antminer S21 XP
MicroBT WhatsMiner M78S
Based on BTC price of $79,227 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Based on our multi-factor analysis, the MicroBT WhatsMiner M78S wins on 1 of 2 factors (hashrate). Where it pulls away hardest is 84% more hashrate (270 vs 498 TH/s). That said, the Antminer S21 XP isn't beaten everywhere — it still wins power consumption. 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 Antminer S21 XP and MicroBT WhatsMiner M78S sit on each measurable spec:
- MicroBT WhatsMiner M78S 84% more hashrate (270 vs 498 TH/s)
- Antminer S21 XP 46% better power draw (3,645 vs 6,723 W)
- Antminer S21 XP 14% better weight (15.4 vs 18.0 kg)
- MicroBT WhatsMiner M78S 84% more heat output (12,437 vs 22,939 BTU/hr)
Cost & ROI Over Time
Sticker price versus what the miner actually earns back: the table below projects cumulative net profit at a $0.10/kWh electricity rate.
| Antminer S21 XP | Metric | MicroBT WhatsMiner M78S |
|---|---|---|
| $8,200 | Upfront cost (MSRP) | — |
| $1.40 | Daily net profit | $2.59 |
| -$7,688 | Net after 1 year | +$945 |
| -$7,176 | Net after 2 years | +$1,889 |
| -$6,664 | Net after 3 years | +$2,834 |
| Takes ~16.0 years to pay back at current rates | 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 M78S$1.18/day higher profit at current rates.
Best for Home Mining
TieBoth miners are equally suitable for home use.
Best for Efficiency
TieBoth miners have comparable efficiency.
Frequently Asked Questions
Antminer S21 XP vs MicroBT WhatsMiner M78S: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M78S is more profitable at $2.59/day compared to $1.40/day for the Antminer S21 XP. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Which is quieter, the Antminer S21 XP or MicroBT WhatsMiner M78S?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
Antminer S21 XP vs MicroBT WhatsMiner M78S: which fits a residential setup better?
Both miners score similarly on our Home Mining Score. Consider your specific constraints (noise tolerance, available power, heat needs) to decide.
What is the efficiency difference between Antminer S21 XP and MicroBT WhatsMiner M78S?
The Antminer S21 XP runs at 13.5 J/TH while the MicroBT WhatsMiner M78S runs at 13.5 J/TH — a difference of 0.0 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs.
Compare Antminer S21 XP with...
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