Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M70S+
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer S21 Hyd (335Th) | Specification | MicroBT WhatsMiner M70S+ |
|---|---|---|
| 335.0 TH/s | Hashrate | 262.0 TH/s |
| 5,360 W | Power Consumption | 3,275 W |
| 16.0 J/TH | Efficiency | 12.5 J/TH |
| — | Noise Level | 75 dB |
| 14.2 kg | Weight | 13.5 kg |
| 18,288 BTU/hr | BTU Output | 11,174 BTU/hr |
| 16/100 | Home Mining Score | 36/100 |
| — | Release Year | — |
| SHA-256 | Algorithm | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer S21 Hyd (335Th)
MicroBT WhatsMiner M70S+
Based on BTC price of $79,091 and current network difficulty as of May 15, 2026. Actual results vary.
Verdict
Our scoring model gives the nod to the MicroBT WhatsMiner M70S+, which leads on 4 of 5 weighted factors (efficiency, power consumption, home mining score, noise level). Its biggest concrete edge: 39% better power draw (5,360 vs 3,275 W). That said, the Bitmain Antminer S21 Hyd (335Th) isn't beaten everywhere — it still wins hashrate. The right pick still depends on your power cost and noise tolerance — the breakdowns above make that call concrete.
Spec Deltas
The Bitmain Antminer S21 Hyd (335Th) and MicroBT WhatsMiner M70S+ diverge on the metrics below — each gap expressed as a real percentage, not a vague "better":
- Bitmain Antminer S21 Hyd (335Th) 28% more hashrate (335 vs 262 TH/s)
- MicroBT WhatsMiner M70S+ 39% better power draw (5,360 vs 3,275 W)
- MicroBT WhatsMiner M70S+ 22% better efficiency (16.0 vs 12.5 J/TH)
- MicroBT WhatsMiner M70S+ 5% better weight (14.2 vs 13.5 kg)
- Bitmain Antminer S21 Hyd (335Th) 64% more heat output (18,288 vs 11,174 BTU/hr)
- MicroBT WhatsMiner M70S+ 125% more home mining score (16.0 vs 36.0)
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.
| Bitmain Antminer S21 Hyd (335Th) | Metric | MicroBT WhatsMiner M70S+ |
|---|---|---|
| $3,999 | Upfront cost (MSRP) | — |
| -$0.67 | Daily net profit | $1.68 |
| -$4,244 | Net after 1 year | +$612 |
| -$4,489 | Net after 2 years | +$1,223 |
| -$4,734 | Net after 3 years | +$1,835 |
| 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 M70S+$2.35/day higher profit at current rates.
Best for Home Mining
MicroBT WhatsMiner M70S+Score: 36/100. 75 dB noise level.
Best for Efficiency
MicroBT WhatsMiner M70S+12.5 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M70S+: which one earns more per day?
At the current BTC price and a $0.10/kWh electricity rate, the MicroBT WhatsMiner M70S+ is more profitable at $1.68/day compared to $-0.67/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 M70S+: which runs at a lower noise level?
The MicroBT WhatsMiner M70S+ 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 M70S+: which fits a residential setup better?
The MicroBT WhatsMiner M70S+ scores 36/100 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.
Bitmain Antminer S21 Hyd (335Th) vs MicroBT WhatsMiner M70S+: how much does the efficiency gap matter?
The Bitmain Antminer S21 Hyd (335Th) runs at 16.0 J/TH while the MicroBT WhatsMiner M70S+ runs at 12.5 J/TH — a difference of 3.5 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 22% better efficiency (16.0 vs 12.5 J/TH).
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