MicroBT WhatsMiner M66S (290Th)

The MicroBT WhatsMiner M66S (290Th) is a high-performance SHA-256 ASIC miner engineered for professional Bitcoin mining operations that demand efficiency, thermal stability, and long-term reliability. Delivering a powerful 290 TH/s hashrate, the M66S strikes an optimal balance between performance and energy management—making it a strong contender for structured mining environments.

With a power consumption of approximately 5365W and an efficiency rating of 18.5 J/Th, the M66S is built to maximize output while maintaining controlled operational costs. What truly sets this model apart is its immersion cooling design, enabling superior heat dissipation, enhanced hardware longevity, and stable performance under continuous heavy workloads. Immersion technology also minimizes acoustic impact, keeping operational noise around 50 dB, which is ideal for advanced, large-scale mining facilities.

Compact yet robust, the M66S measures 267 × 147 × 401 mm and weighs 18 kg, allowing for flexible deployment in immersion tanks and high-density mining setups. Equipped with reliable Ethernet connectivity, it integrates seamlessly into professional mining infrastructures.

Key Advantages

⚡ 290 TH/s SHA-256 performance optimized for Bitcoin mining
💧 Immersion cooling system for maximum thermal efficiency and hardware protection
🔋 18.5 J/Th energy efficiency for balanced power consumption
🔇 Low-noise operation (~50 dB) suitable for controlled environments
📡 Stable Ethernet connectivity for consistent network performance
🌡️ Wide operating range (5–40°C, 5–95% humidity)

Released in October 2023, the WhatsMiner M66S represents a modern immersion-cooled solution built for miners who prioritize operational stability, improved cooling efficiency, and scalable infrastructure readiness. Whether deployed in dedicated immersion farms or advanced data-center setups, the M66S delivers reliable performance for sustained Bitcoin mining profitability.