Lot of 10 Refurbished Bitmain Antminer S19 110TH/s Miners – Boosted, Braiins OS

Description

Ten refurbished Antminer S19 units running 110 TH/s each on Braiins OS — 1.1 PH/s in total. The decisive number on this page is not the hashrate, it is the load. These are firmware-boosted base S19s, and an install specified from Bitmain’s 3,250 W figure comes up at least 5 kW short across the lot.

Where the extra 5 kW comes from

No metered figure for these units at 110 TH/s appears in the listing, and inventing one would be worse than useless to anyone sizing a panel. The arithmetic gives a floor you can rely on: at the factory efficiency of 34.2 J/TH, 110 TH/s would demand 3,250 W × (110 ÷ 95) = about 3,763 W. Overclocking pushes efficiency the wrong way, so treat 3,763 W as a minimum and not an estimate. Ten units therefore need at least 37.6 kW where the stock specification suggested 32.5 kW. Heat scales with the same ratio, so budget roughly 15% more extraction than a stock ten would need.

This is a tuned S19, not an S19 Pro

Both reach 110 TH/s and there the similarity ends. Bitmain’s S19 Pro carries 114 chips per hashboard versus 76 on the base S19 and hits 110 TH/s at 3,250 W for 29.5 J/TH. Getting a base S19 to the same hashrate through firmware costs efficiency instead of adding silicon. These are the boosted base machines. Want the factory Pro instead? Tell us before you order and we will confirm the model and board revision in writing.

Antminer S19 (base model) — Bitmain's published specification

Ten boosted units, in site terms

The four things to have us measure before you order

For a lot this size, useful questions are narrow. One: the metered wall draw per unit at the tuned rate. Two: the pool-side hashrate over a real window, not the self-reported firmware number. Three: the hashboard revision. Four: whether all ten are tuned to the same profile or the lot is mixed, because a mixed lot makes your per-unit power planning guesswork. We will answer all four in writing.

Firmware, stated plainly

Braiins OS tunes chips individually rather than running a board at its weakest chip’s voltage, and near the factory rating that genuinely improves J/TH. Used to exceed the factory rating, as here, it converts efficiency into output. Both statements are true and only the second one applies to this lot. Any listing claiming a boost that simultaneously reduces consumption is describing a machine that does not exist.

What’s in the box

The listing states no PSU inclusion, no condition grade and no warranty term, so this page asserts none of the three. Get all of them in writing before ordering: whether supplies and cords ship with the miners, what the refurbishment consisted of, and what happens if a unit arrives dead. We will confirm each in writing on request.

Who should buy this

Operators buying hashrate density on cheap power, with the panel capacity to feed it. On expensive power the stock 95 TH/s lots earn more per dollar of electricity — fewer terahashes, better J/TH, smaller bill.

The four things to have measured before ten boosted machines ship

These are base S19s tuned up to 110 TH/s, and the tuning is exactly why you want measurements rather than a datasheet. A 200 W per-machine error is 2 kW across ten, which is survivable; the same mistake at a hundred is 20 kW and the difference between a service that carries the site and one that trips. Ten machines is the size at which being wrong is still cheap, so this is the order to build the habit on.

Four questions, and they belong in the written quote rather than in a phone call. The measured wall draw of these machines at the firmware they ship on. Whether power supplies and cords are included, in writing, for this lot specifically. The dead-on-arrival window, the remedy and who pays return freight, as three separate answers rather than one word. And the board revision read off the BHB silkscreen rather than the model name — ordering parts by model name is the single most common mistake we see, because one nominal family covers several incompatible boards.

The longer version of that list is deliberately split in two, because the hardware questions and the seller questions are different jobs: the fleet-scale hardware list is on used ASIC miner fleet economics and the counterparty list is a guide of its own. Run both, and run both on us. A seller who resents the questions has told you something worth knowing before the money moves.

Related hardware and where this sits in the store

Other fleet lots and single units from the same family:

• Lot of 100 Refurbished Bitmain Antminer S19 110TH/s Miners – Boosted, Braiins OS
• Lot of 5 Refurbished Bitmain Antminer S19 110TH/s Miners – Boosted, Braiins OS
• Lot of 20 Refurbished Bitmain Antminer S19 110TH/s Miners – Boosted, VNish OS

Categories: Bitmain Antminer, Bitcoin miner, Used ASIC miners and Air Cooling.

This lot is listed at 110 TH/s on Braiins firmware, which is a boosted 95 TH/s machine rather than a factory S19 Pro — a distinction that changes both the efficiency and the breaker sizing. The used-miner buying guide explains the difference and what to ask us to measure.

Delivery day on a lot this size is its own procedure — what to write on the freight receipt before you sign, reconciling the count and the serial numbers, why the machines come up in groups rather than together, and how to sort the ones that do not: receiving a used miner lot.