
Bitmain · SHA-256
Antminer S21e Hydro
Hashrate332 TH/s
Power5,644 W
Efficiency17.00 J/TH
AvailabilityHK Stock
Net profit / month
at $0.070/kWh$68
at $0.070/kWh$68

The Whatsminer M66 is an air-cooled SHA-256 ASIC miner from MicroBT, built to mine Bitcoin (BTC). It delivers 240–246 TH/s at a power draw of about 5,040–5,166 W, which works out to roughly 21 J/TH.
At 21 J/TH it is a solid efficiency that pays best where electricity is inexpensive. Lower J/TH means more hashrate for every kilowatt-hour, which matters most over the multi-year life of a miner.
It is air-cooled with built-in fans and runs in standard mining racks, best placed in a dedicated, well-ventilated facility rather than at home.
| Manufacturer | MicroBT |
|---|---|
| Model | Whatsminer M66 |
| Algorithm | SHA-256 |
| Mineable coins | Bitcoin (BTC) |
| Hashrate | 240–246 TH/s |
| Power | 5,040–5,166 W (calculated) |
| Efficiency | 21 J/TH |
| Cooling | Air cooling (fans) |
| Condition | New |
| Availability | SZ Stock |
| Warranty | Per quotation |
| Minimum order | 1 unit |



