MicroBT Whatsminer M79 920TH

The MicroBT Whatsminer M79 produces 920 TH/s of SHA-256 hashrate at 14,500W wall draw through a hydro cooled 3U rack mount chassis. Efficiency lands at 15.761 J/TH in the rated operating mode. MicroBT launched the M79 at the Bitcoin MENA 2025 conference in Abu Dhabi as the standard tier of their M70 hydro cooled lineup, sitting one step below the petahash class M79S flagship (1,350 TH/s at 20,000W) in the same chassis family.
Hydro cooling differentiates the entire M79 product family from air cooled alternatives. A pressurized liquid loop circulates coolant directly through heat exchangers mounted against the mining chips, removing the 14.5 kW thermal load without high RPM fans. The result is 50 dB near silent operation at a power density air cooled hardware cannot match. No dust filtration maintenance, no fan bearing wear, no airflow management concerns. The tradeoff is infrastructure: the M79 requires an engineered hydro cooling loop with pumps, cooling distribution units, heat exchangers, and leak safe plumbing sized for the 14.5 kW continuous thermal output per unit.
The M79 and M79S share the same 585 x 368 x 133 mm chassis and 3U rack format. Both integrate into the same hydro cooling loops without modification to tank layout, plumbing, or CDU configuration. Operators can mix M79 and M79S units freely across a single fleet based on per unit economics at their specific electricity rate. The M79 at 14,500W is meaningfully easier to power and cool than the M79S at 20,000W, which matters for facilities with existing circuit capacity limits or CDU thermal budgets that would require upgrades to accommodate multiple M79S units. For incremental scaling into hydro infrastructure, the M79 is often the correct first purchase before committing to the higher power flagship.
MicroBT's broader M70 generation spans three cooling tiers. Air cooled models (M70, M70S, M72 series) target small and mid size operators with standard ventilation infrastructure. Hydro cooled models (M73 series, M76 series, M79, M79S) target industrial farms with liquid cooling loops. Immersion cooled variants target facilities running dielectric fluid tanks. Efficiency across the entire M70 family ranges from 14.5 J/TH on the most efficient tier down through the M79 at 15.761 J/TH, giving operators flexibility to match hardware efficiency to their specific power rate and cooling infrastructure.
Power infrastructure is the hard constraint on the M79. The unit requires 380 to 480V three phase commercial power, drawing approximately 35 amps at 415V or 30 amps at 480V sustained. Standard residential or small facility electrical systems cannot handle the 14.5 kW continuous load regardless of hydro cooling's acoustic advantages. This is industrial mining hardware built for data center environments with three phase infrastructure and engineered cooling loops already in place. The Whatsminer management interface handles pool configuration, hashrate monitoring, temperature tracking, and fleet integration with Bitmain's third party tools or the native Whatsminer platform.
Bitcoin mining economics at the M79 power class depend heavily on electricity rate and current network difficulty. At $0.07 per kWh the unit draws approximately $24.36 per day in electricity. At $0.04 per kWh industrial rates that drops to approximately $13.92 daily. Compared against current Bitcoin revenue at 920 TH/s, the M79 produces positive margins on industrial power and marginal to negative returns on expensive residential power at current difficulty. Run fresh profitability numbers with your specific rate before purchasing. MillionMiner ships the M79 brand new with manufacturer warranty and free DDP delivery worldwide, handling all customs clearance, import duties, and taxes at no additional charge.