MicroBT Whatsminer M78S 472TH

The M78S produces 472 TH/s of SHA-256 hashrate at 7,000W wall draw and 14.83 J/TH efficiency in the rated operating mode. Multiple distributor specifications document an alternate 6,550W / 13.88 J/TH profile running the same 472 TH/s output at meaningfully better efficiency. MicroBT rates the unit at plus or minus 3 percent hashrate tolerance. Real world output typically falls between 458 and 486 TH/s depending on batch, immersion fluid temperature, and selected operating profile.

The M78S is top bin in the 7 kW immersion tier of the M70 generation. Compared against the M78 standard variant at 440 TH/s and 7 kW: the M78S delivers 7 percent more hashrate at identical power draw. Compared against the M76 immersion at 5.2 kW: the M78S offers 35 percent more power per unit for correspondingly higher hashrate output. Compared against the 14 kW M79S hydro flagship: the M78S runs half the power per unit, fitting twice as many units per electrical panel. The M78S is the right choice for facilities scaling immersion incrementally rather than committing to 14 kW hardware immediately.

A 100 kW electrical panel supports 14 M78S units producing 6,608 TH/s aggregate hashrate. The same 100 kW panel supports only 7 M79S units producing 6,510 TH/s. Similar total output but the M78S fleet uses smaller individual breakers (20 amp versus 60 amp at 415V) and creates lower thermal load per tank slot (7 kW versus 20 kW per unit). Smaller per unit power draw means less aggressive cooling per tank slot, smaller initial fluid volume investment, simpler electrical provisioning, and easier incremental scaling. For facilities building their first immersion deployment, the M78S is often the correct starting point before committing to higher power tier hardware.

380 to 480V three phase commercial or industrial power. At 415V three phase: approximately 17 amps per phase, fitting within standard 20 amp commercial breakers. At 480V three phase: approximately 15 amps per phase. Standard residential and small commercial electrical systems cannot handle the 7,000W continuous load. European, Middle Eastern, and industrial Asian facilities running three phase power have direct deployment paths. North American operators need commercial 480V three phase service or step down transformers. PSU ships included but power cord must match your three phase outlet.

Dielectric fluid immersion tanks sized for the miner count plus thermal margin. Required components: immersion tanks with appropriate fluid capacity (typically 50 to 80 liters per M78S unit depending on tank geometry), external heat exchangers (coil or plate type) sized for total facility thermal load, fluid circulation pumps, filtration and particulate management, fluid quality monitoring equipment, and sealed enclosures for vapor management. Compatible dielectric fluids include single phase oils (mineral oil, synthetic esters) and engineered two phase fluids. The M78S shares tank compatibility with the M78 and M76 series, allowing mixed fleet deployment in the same tanks.

At MillionMiner's $0.08 per kWh onsite calculator: $15.45 daily revenue, $13.44 electricity, $2.01 net profit per day. At $0.07 per kWh industrial rates: approximately $11.76 daily electricity, netting $3 to $4 daily. At $0.04 per kWh negotiated industrial rates: $6.72 daily electricity, netting $8 to $9 daily profit per unit. Residential electricity above $0.10 per kWh makes the M78S unprofitable at current difficulty. This is industrial hardware strictly for operators with negotiated industrial power rates. Mining Now March 2026 data confirms similar economics at the alternate efficiency profile.

Any SHA-256 proof of work cryptocurrency. Bitcoin (BTC) is the primary target and largest SHA-256 network. Other compatible coins include Bitcoin Cash (BCH), Bitcoin SV (BSV), Fractal Bitcoin (FB), and DigiByte (DGB SHA-256 chain). Mining Now confirms BTC, BCH, and Fractal Bitcoin as mineable targets for the M78S specifically. Merged mining BTC alongside BCH and BSV through supporting pools like ViaBTC and F2Pool adds marginal secondary revenue without reducing Bitcoin hashrate contribution.

On the network and management side, yes without configuration changes. Both use standard Stratum protocol over Ethernet and identical Whatsminer firmware. The infrastructure constraint is cooling type: M78S units are immersion cooled (dielectric fluid tanks) while M79 series units are hydro cooled (closed liquid loops). These are different cooling approaches requiring separate infrastructure. Facilities running both need dedicated zones for immersion versus hydro deployment. For fleets standardizing on immersion, stay within the M76 / M78 / M78S range. For fleets standardizing on hydro, use the M73 / M76 hydro / M79 / M79S range.

Multiple distributors including Mining Now, X ON Mining, and CryptoMinerBros document an alternate M78S operating profile at 6,550W and 13.88 J/TH efficiency at the same 472 TH/s output. This represents roughly 7 percent better efficiency at 6 percent lower power draw. Use this profile when electricity costs make the 7 kW rated mode marginal, when facility thermal capacity is constrained, or when operating conditions support the tighter power envelope. Whether your specific M78S unit supports the alternate profile depends on batch and firmware version. Verify stable operation before deploying full fleet on the efficiency mode.

No. The M78S requires 380 to 480V three phase industrial power unavailable in residential settings, immersion tank infrastructure with dielectric fluid management, and professional installation for both electrical service and fluid systems. Home mining hardware caps at around 3,500W per unit running on standard 240V 20A circuits. For operators wanting high hashrate home deployment, the Antminer S21 XP at 270 TH/s represents the realistic ceiling. The M78S is strictly industrial hardware for professional mining facilities.

Industrial deployment with three phase power and immersion infrastructure. Step one: install three phase 380 to 480V electrical service. Step two: install and commission immersion cooling infrastructure including tanks, heat exchangers, pumps, filtration, and fluid. Step three: submerge M78S units in immersion tank slots with proper fluid contact and drain pathways. Step four: connect PSU power and Ethernet management. Step five: power on, allow fluid circulation to stabilize, find each miner IP through DHCP, configure pool URL and Bitcoin wallet through the Whatsminer web interface, verify hashrate reaches 458+ TH/s within 15 to 20 minutes.

Immersion maintenance differs from hydro or air cooled hardware. Monthly fluid quality testing (viscosity, dielectric strength, particulate content). Quarterly fluid filter inspection and replacement. Every 18 to 36 months full fluid replacement depending on fluid type and filtration quality. Heat exchanger cleaning every 6 to 12 months. Hashboard failure rates on immersion hardware are lower than air cooled because chips run at consistent temperatures without thermal cycling, but fluid management adds operational overhead. Budget 3 to 5 percent of acquisition cost annually for fluid replacement, filtration media, and maintenance parts.

Any Stratum compatible Bitcoin pool. Foundry USA leads by network share with competitive FPPS payouts. F2Pool has the longest operational track record and supports merged mining. AntPool remains popular across MicroBT fleets despite the manufacturer difference. ViaBTC offers accumulation mode payouts reducing daily variance. For fleet deployments above 4.7 PH/s (equivalent to 10+ M78S units), direct negotiated agreements with major pools typically secure reduced fees below standard 1 to 2 percent rates.

Yes. MillionMiner operates managed hosting facilities with immersion cooling infrastructure capable of supporting M78S deployments. Hosted deployment eliminates the substantial capital cost of building your own three phase electrical service, immersion tanks, and fluid management systems, which typically runs $30,000 to $150,000+ for meaningful fleet capacity. Professional hosting at negotiated industrial rates often beats self hosting when full infrastructure costs are included. Contact MillionMiner sales through the Get a Quote button for hosting pricing, capacity availability, and deployment timelines.

MicroBT's 360 day factory warranty on the complete machine covers manufacturing defects and hardware failures under normal operation within specified environmental ranges. Warranty exclusions include damage from fluid quality neglect, contamination from improper immersion handling, physical damage during tank maintenance, power surge damage from inadequate electrical protection, and operation outside the 5 to 45 degree Celsius range. Document fluid quality testing schedule and maintenance logs to protect warranty coverage. MillionMiner routes claims through direct MicroBT channels for faster resolution than secondary market purchases.

Bitmain does not currently ship a direct immersion equivalent to the M78S in its Antminer S23 family. The closest Bitmain alternatives are the Antminer S21+ Immersion variants at around 325 TH/s and 5,800W, which run lower hashrate and power per unit. For operators comparing the immersion category, the M78S leads on hashrate per unit at 7 kW. The Antminer S23 Hyd 3U at 1.16 PH/s and 11 kW hydro is a different cooling architecture entirely. MicroBT currently has the stronger immersion product portfolio for facilities committed to dielectric fluid infrastructure.

Currently out of stock. Use the Notify Me button on the MillionMiner product page for email alerts when new inventory arrives. Use the Get a Quote button to contact MillionMiner sales directly for estimated restock timing and priority reservation on incoming batches. Industrial immersion hardware moves quickly when batches arrive because the deployment market is concentrated among facility operators with standing orders.

Standard Whatsminer firmware provides the same web interface, pool configuration format, and management API as other MicroBT miners. Fleet management tools including Foreman, Awesome Miner, Hive OS, and Braiins OS+ discover M78S units automatically through network scanning. Additional monitoring metrics for immersion operation (fluid temperature, pump flow rate) appear in immersion specific dashboards when supported. Mixed brand and cooling type fleets handle through unified dashboards with immersion specific alerts for fluid temperature excursions.

CapEx additions beyond miner acquisition: three phase electrical service installation ($3,000 to $15,000 per facility), immersion tank infrastructure ($8,000 to $25,000 per rack depending on capacity and fluid type), fluid fill volumes ($2,000 to $6,000 per tank depending on fluid chemistry), heat exchanger and pump systems ($5,000 to $20,000 per rack), racks and cabling. Annual OpEx per unit: electricity at 7 kW ($4,912 at $0.08 per kWh, $2,453 at $0.04 per kWh), fluid maintenance ($200 to $800 per unit annually), spare parts. MillionMiner hosting eliminates CapEx and simplifies monthly OpEx tracking.

Within MicroBT's immersion lineup: the Whatsminer M78 at 440 TH/s provides the M78S's standard variant sibling, and the M76S / M76 series at 5.2 kW covers lower power immersion tier deployment. Cross family at MicroBT: hydro variants M79 and M79S provide alternative liquid cooling approach, while air cooled M70 and M70S handle facility zones without immersion infrastructure. Cross brand options: the Antminer S21+ at 235 TH/s and Antminer S21 XP at 270 TH/s cover air cooled deployment for mixed cooling facility zones. For operators running diversified algorithm fleets, the Antminer KS7 at 45 TH/s covers Kaspa mining. MillionMiner's ASIC hosting service accepts M78S units at negotiated industrial electricity rates.