MicroBT WhatsMiner M66S
Manufacturer-sourced M66S specifications: 270-298 TH/s, 18.5 J/T, AC 380-480 V and immersion requirements, with dated shop SKUs kept separate.
Quick answer
The MicroBT WhatsMiner M66S is a Bitcoin miner rated about 270-298 TH/s (about 18.5 J/TH).
Full Specifications
| Model | MicroBT WhatsMiner M66S |
|---|---|
| Model Number | WhatsMiner M66S |
| Manufacturer | MicroBT |
| Algorithm | SHA-256 |
| Hashrate | 270-298 TH/s |
| Cooling | immersion |
| Voltage Range | AC 380-480 V |
| Operating Temperature | 25-55 C inlet normal; 25-45 C high-performance |
| Dimensions | 267.5 x 147 x 401 mm with handle |
| Weight | 16 kg net; 17 kg gross |
| Interface | Ethernet |
| Status | Lifecycle not independently verified |
The current manufacturer manual defines the immersion-cooled WhatsMiner M66S family at 270-298 TH/s +/-10% and 18.5 J/T +/-5%. Its normal-mode and high-performance wall-power fields are blank, so this profile does not derive nominal watts by multiplying hashrate and efficiency.
Electrical and immersion requirements
The manual specifies AC 380-480 V input and a custom power connection rated at 16 A or higher. It does not state the phase or conductor arrangement. Confirm the exact unit nameplate and installation manual. The immersion loop requires at least 24 L/min flow +/-10% and S5X or S3X insulating coolant.
Normal-mode coolant inlet is 25-55 C; high-performance mode is 25-45 C, with +/-2 C control. Storage and transport temperature is -40 C to 70 C. Storage humidity is 5-95% and long-term storage 30-69%, non-condensing. The manual does not publish operating humidity, pressure, pH, coolant volume, or outlet temperature.
Physical record and current shop SKUs
The manual lists 267.5 x 147 x 401 mm including the handle, 16 kg net, 17 kg gross, and Ethernet. It does not publish noise, a PSU model, ASIC details, control-board platform, or release date.
Current official-shop lane, reviewed August 27, 2026: active 290 TH/s and 286 TH/s bins are listed at 18.5 J/T. The selected 290 TH/s SKU displays 5,365 W; applying its displayed efficiency to the 286 TH/s bin gives approximately 5,291 W, so that second value is labeled arithmetic rather than a manual wall-power specification. These dated shop bins do not turn the manual’s blank power fields into a universal rating.
Firmware and recovery boundary
This model and cooling class do not identify its firmware or recovery media. Record the raw reported platform, complete displayed type, installed version, cooling class, and symptom first. If any record conflicts or is unavailable, do not select a package.
- Confirm this miner’s platform before firmware or recovery.
- Only after a resolved, non-conflicting identification, review official firmware and recovery scope.
- For identity conflicts, no boot, repeated failure, or electrical, thermal, flow, or liquid concern, request WhatsMiner diagnosis.
Primary sources: manufacturer M66S manual (October 2024), listed in the official manual catalog; and the current manufacturer-shop record. Reviewed August 27, 2026.