Bitmain Antminer V9 (4Th) vs MicroBT Whatsminer M21S
Side-by-side specs, profitability, and home mining comparison.
Specifications Comparison
| Bitmain Antminer V9 (4Th) | Specification | MicroBT Whatsminer M21S |
|---|---|---|
| 4.0 TH/s | Taux de hachage | 56.0 TH/s |
| 1,027 W | Consommation électrique | 3,360 W |
| 256.8 J/TH | Efficiency | 60.0 J/TH |
| — | Niveau de bruit | — |
| 3,050.0 kg | Weight | 12,500.0 kg |
| 3,504 BTU/hr | BTU Output | 11,464 BTU/hr |
| 31/100 | Home Mining Score | 22/100 |
| — | Release Year | — |
| SHA-256 | Algorithme | SHA-256 |
| Bitmain | Manufacturer | MicroBT |
Profitability Comparison
Bitmain Antminer V9 (4Th)
MicroBT Whatsminer M21S
Based on BTC price of $78,179 and current network difficulty as of May 17, 2026. Actual results vary.
Verdict
Run the numbers across every spec and the MicroBT Whatsminer M21S edges it: 2 of 4 factors go its way (efficacité, hashrate). The standout gap is 1300% more hashrate (4.0 vs 56.0 TH/s) in the MicroBT Whatsminer M21S's favour. That said, the Bitmain Antminer V9 (4Th) isn't beaten everywhere — it still wins consommation électrique and score de minage domestique. Cross-check the spec deltas and ROI table above against your own electricity rate before deciding.
Spec Deltas
Here is every spec where the Bitmain Antminer V9 (4Th) and MicroBT Whatsminer M21S actually differ, with the gap quantified:
- MicroBT Whatsminer M21S 1300% more hashrate (4.0 vs 56.0 TH/s)
- Bitmain Antminer V9 (4Th) 69% better power draw (1,027 vs 3,360 W)
- MicroBT Whatsminer M21S 77% better efficacité (256.8 vs 60.0 J/TH)
- Bitmain Antminer V9 (4Th) 76% better weight (3,050 vs 12,500 kg)
- MicroBT Whatsminer M21S 227% more heat output (3,504 vs 11,464 BTU/hr)
- Bitmain Antminer V9 (4Th) 41% more score de minage domestique (31.0 vs 22.0)
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 V9 (4Th) | Metric | MicroBT Whatsminer M21S |
|---|---|---|
| — | Upfront cost (MSRP) | $650 |
| -$2.32 | Daily net profit | -$6.05 |
| -$847 | Net after 1 year | -$2,858 |
| -$1,694 | Net after 2 years | -$5,066 |
| -$2,541 | Net after 3 years | -$7,274 |
| — | Payback period | Does not pay back at current rates (negative daily profit) |
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
TieBoth miners produce similar daily profit.
Best for Home Mining
Bitmain Antminer V9 (4Th)Score: 31/100. 0 dB noise level.
Best for Efficiency
MicroBT Whatsminer M21S60.0 J/TH — lower electricity cost per terahash.
Frequently Asked Questions
Which makes more money, the Bitmain Antminer V9 (4Th) or the MicroBT Whatsminer M21S?
At the current BTC price and a $0.10/kWh electricity rate, the Bitmain Antminer V9 (4Th) is more profitable at $-2.32/day compared to $-6.05/day for the MicroBT Whatsminer M21S. Profitability depends heavily on your electricity rate — use the selector above to calculate with your actual costs.
Is the Bitmain Antminer V9 (4Th) or the MicroBT Whatsminer M21S better for noise-sensitive spaces?
Both miners have similar noise levels. Check the specs table above for exact decibel readings.
For mining at home, should I pick the Bitmain Antminer V9 (4Th) or the MicroBT Whatsminer M21S?
The Bitmain Antminer V9 (4Th) scores 31/100 on our Home Mining Score (vs 22/100 for the MicroBT Whatsminer M21S). 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 Bitmain Antminer V9 (4Th) and MicroBT Whatsminer M21S?
The Bitmain Antminer V9 (4Th) runs at 256.8 J/TH while the MicroBT Whatsminer M21S runs at 60.0 J/TH — a difference of 196.8 J/TH. Lower efficiency means less electricity per terahash of mining power, directly reducing operating costs. In relative terms that is 77% better efficacité (256.8 vs 60.0 J/TH).