MicroBT Whatsminer M73 Series Review | 2026

The Whatsminer M73 series, including the M73, M73S, and M73S+, represents MicroBT’s latest hydro-cooled Bitcoin ASIC lineup, designed for professional mining farms seeking extreme density. Built on advanced 5nm ASICs, the base M73 targets approximately 500 TH/s at ~7.4 kW (≈14.5 J/TH), while the M73S and M73S+ offer higher hash rates—up to ~600 TH/s—and improved efficiency (down to ~12.5 J/TH).

 

In practice, a stock 500 TH/s unit consumes roughly 7,424 W, generating about $18/day in revenue at current network difficulty, minus $10–27/day in power cost depending on electricity rates. At $0.05/kWh, ROI on a $6,144 unit is roughly 21 months; at $0.10/kWh it extends to decades, and at $0.15/kWh it becomes unprofitable.

 

Compared to contemporaries, the M73’s hydro design drastically reduces noise and allows tighter hashpower packing than air-cooled models such as Bitmain’s S21/S19. Below, we summarize key specs, compare performance against rivals, and provide insights on real-world operation, maintenance, and buying considerations.

 

 

 

Technical Specifications

The Whatsminer M73 series is a 2U water-cooled miner. Official MicroBT specifications are as follows:

Model	Hashrate (TH/s)	Power (W)	Efficiency (J/TH)	Weight (kg)	Dimensions (L×W×H mm)	Cooling
Whatsminer M73	~470–526 (nominal 500)	7200 W (±10%)	14.5 J/TH (±5%)	29.5	663×482.6×86	Liquid (hydro)
Whatsminer M73S	~500–552 (nominal 525)	7200 W (±10%)	13.5 J/TH (±5%)	29.5	663×482.6×86	Liquid (hydro)
Whatsminer M73S+	~540–600 (nominal 570)	7200 W (±10%) / 10 kW boost	12.5 J/TH (±5%)	29.5	663×482.6×86	Liquid (hydro)

All units require 380–480 V three-phase input. Each miner utilizes MicroBT’s proprietary 5nm ASIC chips and standard WhatsMiner firmware, with optional third-party OS options like Braiins or LuxOS. Heavy-duty 16 A minimum cabling is required.

 

Noise is minimal for hydro units; for reference, MicroBT’s M53S++ is rated at ~35 dB, far quieter than air-cooled miners like the Bitmain S19 XP (~75 dB). Physically, the M73 series is compact for 2U (86×483×663 mm) and weighs ~27.5 kg net (~30 kg packaged).

 

 

Performance and Real-World Hashrate

Optimized for SHA-256, the base M73 targets ~500 TH/s at ~7.2–7.5 kW. MicroBT’s efficiency claims are 14.5 J/TH for the M73 and down to 12.5 J/TH for the M73S+, with most field units meeting or slightly exceeding these numbers. A real-world report recorded ~600 TH/s at ~7,500 W (~12.5 J/TH) for an M73S+, confirming the performance potential when properly cooled. Expect ±5–10% variance in hashrate due to chip binning and firmware.

 

Revenue calculations at mid-2025 BTC prices suggest a 500 TH/s unit generates ~$18/day. Electricity costs at $0.05/kWh reduce profits to ~$9/day; at $0.10/kWh it nears break-even, and at $0.15/kWh it runs at a loss. ROI is highly sensitive to power cost:

$0.05/kWh → ~21 months ROI (~$9/day profit)

$0.10/kWh → ~25 years ROI (~$1/day profit)

$0.15/kWh → unprofitable

Industrial miners typically target $0.03–$0.05/kWh rates to make such high-density rigs viable.

 

 

 

Competitor Comparison：

Model	Hashrate (TH/s)	Power (W)	Efficiency (J/TH)	Cooling
WhatsMiner M73	470–526	7200	14.5	Hydro
WhatsMiner M73S+	540–600	7200/10,000	12.5	Hydro
Bitmain Antminer S21 XP	270	3645	13.5	Air
Bitmain Antminer S19 XP	141	3010	21.5	Air
WhatsMiner M50S++	154–162	3520	22	Air

The M73 series delivers nearly double the hashpower of the closest air-cooled competitor (S21 XP) while maintaining top-tier efficiency. Only other hydro or immersion rigs, such as MicroBT’s M53S++, approach this level.

 

 

Reliability, Maintenance, and Firmware

MicroBT’s M73 inherits solid build quality and a one-year warranty. Water-cooled rigs demand specific maintenance: coolant leaks, freezing damage, and system setup errors can impact performance. A closed-loop cooling system with proper coolant, radiator, pumps, and plumbing is essential. Anti-freeze additives are mandatory in freezing environments.

 

Firmware is stable via the standard WhatsMiner web UI, though third-party firmware (Braiins OS+, LuxOS) offers additional monitoring and auto-reboot features. Noise is low (<40 dB) due to minimal fans, though radiator fans and the PSU generate some sound. Regular maintenance includes:

Cleaning radiator and PSU fans

Inspecting electrical connections and grounding

Monitoring hashboards for errors

Purging air and draining liquid before storage

 

 

Buying Advice and Alternatives

The Whatsminer M73 is best suited for large-scale, professionally managed farms with built-in hydro or immersion cooling. Home or small-scale miners may find air-cooled alternatives such as the Bitmain S21 XP (270 TH/s, 3645 W) or WhatsMiner M50S++ more practical.

Hydro miners generally trade at a discount second-hand unless buyers have compatible infrastructure. Retaining original documentation and spare parts enhances resale potential.

 

 

The Verdict: Is the Whatsminer M73 Worth It?

The MicroBT Whatsminer M73 Series is a masterful display of specialized computing engineering. It strips away the vulnerabilities of air-cooled equipment and replaces them with an incredibly dense, efficient, and robust hydro platform.For mining entities with immediate access to affordable, long-term power and the capital capacity to deploy liquid infrastructure, the M73S and M73S+ provide an exceptional blend of institutional-grade operational lifespan, elite energy efficiency, and stable hashing performance. As the global mining industry continues its migration toward high-density liquid infrastructure, the M73 series sets a formidable standard that will dictate corporate hardware procurement strategy for years to come.  

 

 

Maximize Mining Efficiency with Lian Li’s WhatsMiner M73 Mining Container

Unlock the full potential of your mining operations with Lian Li’s purpose-built Mining Container for the WhatsMiner M73 series. Engineered for large-scale mining farms, this container delivers highly efficient liquid cooling that keeps your miners running at optimal temperatures, reducing downtime and boosting performance.

Designed for rapid deployment, our containers allow you to scale your mining farm quickly and reliably, no matter the environment. All products are rigorously tested and certified under RoHS, CE, and UL standards, ensuring safety, reliability, and peace of mind.Experience the future of mining infrastructure—efficient, scalable, and ready to perform.

 

 

FAQ:

What infrastructure is required to operate a machine from the Whatsminer M73 Series?

Unlike standard air-cooled setups, the Whatsminer M73 Series requires a dedicated hydro-cooling setup to operate. This includes industrial cooling towers, dry coolers, or closed-loop heat exchangers capable of continuously dissipating roughly 5.5 kW of thermal energy per machine. Additionally, operators must use high-amperage, 3-phase power distributions and treated, demineralized water to prevent mineral scale accumulation and sudden thermal failure inside the internal fluid loops.  

How does the standard Whatsminer M73 hashing efficiency protect long-term ROI?

The base models of the Whatsminer M73 ecosystem operate at a highly competitive power efficiency of approximately 17.0 J/TH. By utilizing a true liquid-to-chip custom fluid network directly mated to the hashboards, the machine maintains an incredibly low and uniform temperature distribution across all internal chips. This thermodynamic consistency eliminates localized hotspots, heavily reduces silicon degradation compared to air-cooled rigs, and can significantly extend the machine's profitable lifecycle to upwards of 5+ years.

What are the primary hashrate and power advantages of upgrading to the Whatsminer M73+?

The Whatsminer M73+ is engineered for high-density mining environments looking to maximize computational output per rack, pushing performance up to a massive 340+ TH/s. It achieves an enhanced energy efficiency of approximately 16.5 J/TH while pulling roughly 5610W of power. To support this increased power draw, the variant utilizes an enhanced fluid flow cooling mechanism (~10 L/min to 14 L/min) to safely pull heat away from the overclocked ASIC chip arrays.