Whatsminer M66S
Next-gen immersion miner from MicroBT with 298 TH/s. Successor to M56 series with improved efficiency.
Immersion-Cooled Miner
This miner is designed to operate fully submerged in a dielectric (non-conductive) cooling fluid. Unlike hydro miners that circulate liquid through internal channels, immersion miners have their entire board and chips bathed in engineered coolant inside a specialized tank.
Immersion cooling is the most effective thermal management available for ASIC miners. It eliminates all fan noise (completely silent operation), removes dust and humidity as failure factors, enables maximum overclocking potential, and dramatically extends hardware lifespan by maintaining perfectly even chip temperatures.
The trade-off is infrastructure: immersion requires a tank, dielectric fluid (typically engineered hydrocarbon or synthetic), and a heat exchanger. It is the gold standard for professional mining farms and serious home miners who want maximum performance with zero noise.
Professional-Grade Miner
This miner draws 5,518W and produces 50 dB of noise — it is designed for dedicated mining environments, not living spaces. Professional-grade miners deliver the highest hashrate and revenue per unit but require proper infrastructure: a 240V circuit, adequate ventilation or exhaust ducting, and a space where noise is not a concern (garage, basement, warehouse, or outdoor enclosure).
For home miners looking for a quieter alternative, consider our Bitcoin Space Heater builds or explore open-source miners like the Bitaxe that are purpose-built for residential environments.
Profitability Calculator
| Period | Revenue | Electricity Cost | Profit |
|---|---|---|---|
| Daily | $9.37 | $9.27 | $0.10 |
| Weekly | $65.58 | $64.89 | $0.69 |
| Monthly | $281.06 | $278.11 | $2.95 |
| Yearly | $3,419.58 | $3,383.64 | $35.94 |
Heating offset estimates the value of heat replacing an electric space heater during heating season (~6 months/year in Canada). Actual savings depend on your heating setup and climate.
Where to Buy the Whatsminer M66S
D-Central Technologies
CanadaBitcoin Mining Hackers since 2016. Ships from Laval, Quebec.
View ProductASIC Miner Market
United StatesWide selection of new and used ASIC miners. US-based shipping.
Shop NowFull Specifications
| Model | Whatsminer M66S |
| Model Number | M66S |
| Manufacturer | MicroBT |
| Algorithm | SHA-256 |
| Coins Mined | Bitcoin (BTC) |
| Hashrate | 298 TH/s |
| Power Consumption | 5,518 W |
| Efficiency | 18.52 J/TH |
| Noise Level | 50 dB |
| Chip Model | WM3810 |
| Cooling | Immersion |
| Voltage Range | 380-480V 3-phase |
| Operating Temperature | 5-45°C |
| Dimensions | 267x147x401 |
| Weight | 13.5 |
| Interface | Ethernet |
| BTU Output | 18827.4 BTU/hr |
| Equivalent Heater | Equal to a 5,518W space heater |
| Daily Power Cost | $9.27/day |
| Monthly Power Cost | $278.11/mo |
| Circuit Requirement | 240V circuit required |
| Release Date | 2024-09-01 |
| MSRP | $8,000.00 |
| Status | Active |
Home Mining Assessment
Next-gen immersion miner from MicroBT with 298 TH/s. Successor to M56 series with improved efficiency.
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Frequently Asked Questions
Is the Whatsminer M66S profitable?
At $0.07/kWh electricity, the Whatsminer M66S generates approximately $0.10 in daily profit. Profitability depends on your electricity rate and Bitcoin network conditions. Use the calculator above with your actual electricity rate for personalized results.
Can I mine Bitcoin at home with the Whatsminer M66S?
The Whatsminer M66S has a home mining score of 44/100. With 50 dB noise and 5,518W power draw, it may require a dedicated space like a garage, basement, or outdoor enclosure. Consider noise insulation and proper ventilation.
Can the Whatsminer M66S heat my home?
The Whatsminer M66S outputs approximately 18827.4 BTU/hr of heat. For reference, a typical space heater produces 5,000-5,500 BTU/hr. All electrical energy consumed by the miner is converted to heat, making it 100% efficient as a heater. D-Central offers Bitcoin Space Heater builds designed specifically for home heating integration.
Does D-Central repair the Whatsminer M66S?
Yes, D-Central provides professional repair services for the Whatsminer M66S. Our technicians have repaired 2,500+ miners since 2016. Services include hashboard repair, control board diagnostics, fan replacement, and full refurbishment. Ship your miner to our Laval, Quebec facility for diagnosis and repair.
What power supply does the Whatsminer M66S need?
The Whatsminer M66S draws 5,518W of power. You need a power supply rated for at least 6,070W with appropriate voltage (380-480V 3-phase). D-Central stocks compatible power supplies in our shop. Always use a quality PSU from a reputable manufacturer to protect your investment.