Product Overview

The Whatsminer M50 120T is an entry-level variant of MicroBT’s M50 series, designed for Bitcoin (BTC) SHA-256 mining. With a hashrate of 120 terahashes per second, it occupies the middle position in the M50 trio — between the 118T and the 124T — offering a balance of performance and cost within the same generation of hardware.

The M50 series represents MicroBT’s 5nm-class chip generation, delivering a significant efficiency improvement over the earlier M30S lineup. The M50 120T shares the same physical design, cooling architecture, and electrical specifications as its siblings, meaning operators building out multi-unit farms can mix M50 variants without requiring different infrastructure.

This miner is suited to both new entrants into Bitcoin mining who want modern hardware without paying a premium for top-tier hashrate, as well as experienced operators replacing older M30S or S17-era equipment with more efficient modern units.

Key Features

• 120 TH/s hashrate: Mid-tier output within the M50 family, providing a step up from the 118T while keeping costs lower than the 124T variant.
• Approximately 26–27 J/TH efficiency: Operating at around 3264W, this places the M50 120T at approximately 27.2 J/TH — a substantial efficiency gain over the M30S series (34+ J/TH) and competitive with current industry standards.
• Air-cooled, dual fan design: The M50 120T uses two high-speed axial fans in a sealed chassis, making it compatible with standard rack deployment in a mining farm environment.
• SHA-256d algorithm: Purpose-built for Bitcoin (BTC) mining, with compatibility for other SHA-256d coins including Bitcoin Cash (BCH) and Bitcoin SV (BSV).
• Standard industrial form factor: At approximately 370 × 195 × 290 mm, it fits standard mining rack configurations alongside other M50-series and competing Bitcoin ASIC miners.
• Ethernet connectivity: Single RJ-45 port for wired connection to a mining pool or farm management system. Configuration via built-in web interface.
• Proven MicroBT hardware reliability: MicroBT is one of the two dominant Bitcoin ASIC manufacturers globally. The M50 series benefits from the company’s established quality control and firmware support ecosystem.

Technical Specifications

• Algorithm: SHA-256d
• Supported coins: Bitcoin (BTC), Bitcoin Cash (BCH), Bitcoin SV (BSV)
• Hashrate: 120 TH/s (±5%)
• Power consumption: ~3264W (±10%) at 25°C ambient
• Power efficiency: ~27.2 J/TH (±10%)
• Cooling type: Air-cooled, dual high-speed fans
• Noise level: ~75 dB(A)
• Input voltage: 200–240V AC
• Networking: Ethernet (RJ-45)
• Operating temperature: 5°C to 45°C
• Dimensions (L×W×H): 370 × 195 × 290 mm
• Net weight: ~14.2 kg

Power & Installation Notes

South Africa operates on 230V AC at 50Hz, which is fully compatible with the Whatsminer M50 120T’s rated input of 200–240V. No step-down transformer or voltage converter is needed.

At approximately 3264W continuous draw, this miner requires a dedicated high-amperage circuit. A dedicated 20A or 32A circuit wired by a registered electrician is strongly recommended. Running the M50 120T on a shared domestic circuit risks tripping circuit breakers and could pose a fire hazard if the wiring is undersized. Do not use a standard 16A wall socket without professional electrical assessment.

Load shedding significantly impacts operational uptime in South Africa. At 3.26 kW, running this miner through load shedding on a home battery/UPS system is not practical — most residential inverter systems (5–10kWh) would support less than 3 hours of runtime. Operators serious about continuous uptime should factor in either a generator or commercial standby power solution.

Adequate ventilation is essential. The dual fans move significant air volume and generate heat that must be exhausted from the installation space. A dedicated mining room should have active air extraction to maintain ambient temperature below 40°C for optimal performance and hardware longevity.

Electricity Cost Context — South Africa

At 3264W running 24 hours a day, the Whatsminer M50 120T consumes approximately 78.3 kWh per day, or roughly 2 350 kWh per month. At a reference residential tariff of R2.80/kWh (municipal rates vary), the estimated monthly electricity cost is approximately R6 580 per month.

Calculation: (3264 ÷ 1000) × 24 × 30 × R2.80 = ~R6 580/month.

This is a substantial operating cost that makes the M50 120T unsuitable for casual home mining on standard residential tariffs. It is best suited to operators with access to commercial or industrial electricity tariffs, below-average municipal rates, or on-site renewable generation. This is an operating cost estimate only and should not be interpreted as a profitability projection.

Ideal Use Cases

• Small-to-medium commercial mining operations: Operators running 10–100 units in a purpose-built facility with dedicated power supply and thermal management.
• Upgrading from older generation hardware: An excellent replacement for M30S, M20S, or S17-class miners, offering meaningfully better efficiency with the same rack footprint.
• Bitcoin mining pool participants: Works with all major SHA-256 pools (Foundry, AntPool, F2Pool, ViaBTC, Braiins) for stable, predictable income streams.
• Mixed M50 farm builds: Operators who want to mix 118T, 120T, and 124T units within the same farm without changing infrastructure — all M50 variants share the same power and rack requirements.
• Investors entering ASIC mining for the first time: The M50 120T offers a well-documented, established hardware platform with community support, firmware availability, and a clear upgrade path.

Frequently Asked Questions

Does the Whatsminer M50 120T work on South African power?
Yes. SA’s 230V/50Hz supply is within the M50 120T’s operating range. You will need a dedicated circuit — a standard 16A household socket is not adequate for continuous operation at 3264W.

What pool should I use with the Whatsminer M50 120T?
Any SHA-256-compatible pool will work. Popular options include Foundry USA Pool, AntPool, F2Pool, ViaBTC, and Braiins Pool. Simply configure the pool URL, worker name, and password in the miner’s web interface (accessible via your local network IP).

How loud is the Whatsminer M50 120T?
At approximately 75 dB(A), the M50 120T is significantly louder than normal home appliances and is not suitable for residential living spaces. It should be operated in a separate dedicated room, outbuilding, garage, or container — ideally with soundproofing if located near occupied spaces.

What is the difference between the M50 118T, 120T, and 124T?
The three models differ only in hashrate binning — 118 TH/s, 120 TH/s, and 124 TH/s respectively. They share the same chassis, cooling design, and power efficiency class. See also: Whatsminer M50 118T and Whatsminer M50 124T.

Can I mine coins other than Bitcoin with the M50 120T?
Yes — the M50 120T runs the SHA-256d algorithm, which is used by Bitcoin (BTC), Bitcoin Cash (BCH), and Bitcoin SV (BSV). However, Bitcoin is by far the most valuable and liquid of these, making it the standard choice for operators focused on return.

What’s Included

• 1× Whatsminer M50 120T ASIC miner unit
• Power supply unit (confirm with order — some configurations ship without PSU)
• Power cable (region-specific — South African-compatible plugs may require local sourcing or electrician wiring)
• Ethernet cable not included
• Quick-start guide