Bitmain Antminer S19j Pro 100 TH/s SHA-256 Bitcoin Miner

100 TH/s of SHA-256 hashrate, rated by Bitmain at 29.5 J/TH like every S19j Pro bin. Wall draw is commonly quoted between about 2,950W and 3,050W depending on batch, ambient conditions and meter accuracy, and both figures sit inside Bitmain's plus or minus 5 percent power tolerance. Hashrate carries its own tolerance of a few percent, so treat the headline number as a rating rather than a guarantee and check what an individual unit actually reports under sustained load.

No, and it is worth being clear about that. The S19j Pro shipped in several hashrate bins, with 104 TH/s above this one, and the S19j Pro+ sits above the whole S19j Pro line at 117 and 122 TH/s. The 100TH is the middle of the range: a mid grade chip selection producing a round number. That is not a criticism, because the bins share the same 29.5 J/TH rating, so the 100TH costs the same per terahash to run as the 104TH. It simply means you should evaluate it on price per terahash rather than assume you are buying the fastest variant.

All the S19j Pro bins share a 29.5 J/TH rating, so the 104TH produces 4 percent more hashrate for roughly 4 percent more power and costs the same to run per terahash. The choice between them is purely price per terahash and physical condition. The S19j Pro+ is a genuine step up rather than another bin: at 117 and 122 TH/s it reaches roughly 28.7 and 27.5 J/TH, so it is both faster and more efficient, and it draws more power per unit. If you are filling a fixed number of rack slots the Pro+ produces more from each one; if you are filling a fixed power budget, compare J/TH first and price per terahash second.

It ships with an integrated Bitmain power supply that takes 200 to 240V AC, and it does not run on 110 to 120V household service, so North American operators need a dedicated 240V circuit installed before the machine arrives. Some spec listings for this model quote 12V; that is the DC rail the PSU feeds to the hashboards internally, not the input voltage you wire to. Confusing the two is the most common planning mistake on S19 class hardware and it is worth checking your circuit before ordering rather than after delivery.

It depends entirely on your electricity rate and the price per terahash you pay. At around 29.5 J/TH it is roughly twice as thirsty per terahash as current generation air cooled hardware, so it works on low industrial or hosted power and struggles on commercial or residential tariffs. Where it earns its place is fleet filling: when you have cheap power and want to add hashrate at the lowest capital cost per terahash, S19j Pro units are among the cheapest way to do it, and the platform has enough spare parts and repair expertise behind it to keep a fleet running. Model your own rate on the live calculator before committing.

Yes, and on S19 class hardware it is the main lever operators still have. BraiinsOS+ and Vnish support autotuning, undervolting and per chip frequency control, which trades some hashrate for a better J/TH figure and can keep an S19j Pro viable at rates where stock firmware would not. Reported gains vary with chip quality, cooling and how aggressively you tune, so test on a single unit and measure before rolling changes across a fleet. Installing third-party firmware may affect manufacturer warranty coverage, which matters more on units still inside their warranty period.

About 75 dB from four high speed fans, industrial noise on the level of a vacuum cleaner running continuously, plus roughly three kilowatts of heat to remove. That rules out any living space. A dedicated equipment room, a garage or outbuilding with real ventilation, or a hosting facility are the realistic options, and the machine needs a clear intake at the front and an unobstructed exhaust path at the back. Recirculating hot exhaust into the intake is the leading cause of thermal throttling and shortened hardware life in small deployments, so plan the airflow before the machine arrives.

Any SHA-256 proof of work cryptocurrency. Bitcoin is the primary target, with Bitcoin Cash, Bitcoin SV and Fractal Bitcoin as practical alternatives, plus smaller SHA-256 chains. It cannot mine Scrypt coins such as Litecoin, KHeavyHash coins such as Kaspa, or anything outside SHA-256. Pool selection happens in the standard Antminer web interface over Ethernet, and the machine is agnostic about which SHA-256 pool it points at, so you can move between them without touching the hardware.

Ask for a status page screenshot taken under sustained load rather than at startup, showing all three hashboards detected with full chip counts and hashrate close to the rating. A board reporting fewer chips than it should is the classic sign of a unit that has run hot. Confirm the power supply is the matching integrated Bitmain unit, ask about hours run and storage conditions, and check whether third-party firmware is installed and whether any mining fee is enabled on it. For maintenance, clear dust from fans and heatsinks regularly, treat fans as a wear item, and expect the occasional hashboard or PSU repair on hardware of this age. Buying through a dealer that tests before shipping removes most of this risk.

Coverage depends on whether the unit is new stock or secondhand, so confirm the term on the specific machines at order; new S19j Pro units have commonly carried a six month factory warranty. MillionMiner ships worldwide DDP with customs clearance, duties and taxes handled, so the checkout figure is the final landed cost. If efficiency rather than price per terahash is your priority, current generation air cooled hardware in the 13 to 17 J/TH band roughly halves energy per terahash against this machine, and hydro models go further again. Hosting at industrial power rates is usually the deciding factor for S19 class fleets, so it is worth a quote either way.