Lot of 5 Refurbished Antminer S19 110TH/s Boosted

Description

Five refurbished Antminer S19 units running 110 TH/s each on Braiins OS — 550 TH/s in total. Start with the fact that most 110 TH/s listings never mention: these reach that number on firmware, from a base S19, so they do not draw the 3,250 W printed on Bitmain’s specification and an install sized from that sheet will be short.

A boosted S19 and a factory S19 Pro are not the same machine

The confusion is understandable, because Bitmain’s S19 Pro is also a 110 TH/s machine. It gets there differently: 114 chips per hashboard against the base S19’s 76, which is 50% more silicon doing the same work, and it lands at 3,250 W and 29.5 J/TH. A base S19 driven to 110 TH/s on firmware arrives at an identical hashrate with materially worse efficiency and a bigger power bill. What is sold here is the boosted base machine. If you specifically need factory S19 Pro hardware, say so before ordering and we will confirm in writing which model and board revision is going into the crate.

What these actually draw

The metered draw of these five at 110 TH/s is not stated in the listing and no figure is going to be invented for it here. The usable floor comes from arithmetic: holding the factory 34.2 J/TH constant, 110 TH/s needs 3,250 W × (110 ÷ 95) = roughly 3,763 W per unit. Because efficiency falls under overclock rather than holding, the real number is above 3,763 W. For five machines that is at least 18.8 kW, versus the 16.25 kW the stock sheet would have given you. Per machine at 240 V it is at least 15.7 A before any continuous-load derate is applied. Ask us to meter the units you are buying; we will send the measured figure in writing.

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

Stock hashrate	95 TH/s ±5%, SHA-256
Stock power at the wall	3,250 W ±5%
Stock efficiency	34.2 J/TH by arithmetic (3,250 W ÷ 95 TH/s); Bitmain publishes 34.5 J/TH ±5%
Input voltage	200–277 V AC. This is not a 110 V machine and no adapter makes it one
ASIC chip	BM1398BB, 7 nm — 76 chips per hashboard, 228 per machine
Noise	~75 dB from 4 fans
Dimensions and weight	400 × 195.5 × 290 mm bare, 570 × 316 × 430 mm boxed. 14.2 kg net, 16 kg gross per unit — Bitmain’s published S19 specification (model 240-Ca). Freight is billed on the gross weight, not the net
Operating temperature	5–40 °C · Network: Ethernet RJ45
Generation	launched May 2020, so a unit sold today is around six years old

Five worked-hard machines and no spares float

One failure is 20% of this purchase, and firmware-boosted units run hotter and harder than stock ones, which does not help. That is not an argument against buying them — it is an argument for settling the terms first. The three things worth having in writing before you order: the pool-side hashrate rather than the number the firmware reports about itself, the hashboard revision in each unit, and whether all five are tuned identically or the lot is mixed.

What’s in the box

Power supplies are not mentioned in this listing, so this page does not claim any are included. Boosted machines also put more demand on a supply than stock ones do, which makes the question sharper here than on a stock lot. Confirm PSUs, their rating, cords and plug standard with us in writing before you order.

Condition and warranty

Sold refurbished and tested, with no condition grade and no warranty term stated in this listing — so none is implied here. Ask us for the grade, the DOA window and the return terms in writing, and note that on overclocked hardware the return terms are worth reading twice.

Who should buy this

Operators who want maximum hashrate per rack slot and have power cheap enough that a worse J/TH does not decide the outcome. If your power is expensive, buy the stock 95 TH/s lots instead — you give up terahashes and get efficiency back, and on retail electricity that is usually the better end of the trade.

Questions buyers ask about this lot

Will this run on a normal household outlet?

No. This lot needs a dedicated 200–277 V circuit. A North American 120 V household outlet will not run it under any adapter or configuration. Have an electrician confirm the supply before the pallet arrives.

How loud is it?

~75 dB from 4 fans — about as loud as a household vacuum cleaner running continuously, and it does not stop. This is a garage, workshop, outbuilding or hosted-facility machine, not something to put in a room where people live or sleep.

What condition is it in, and what does that grade mean?

This is second-hand stock. We describe it the way we found it: tested working means it ran on our bench at the stated hashrate, refurbished means it was also cleaned, re-pasted or had parts replaced, and as-is means it is sold without a working claim. The grade for this unit is stated in the description above; where a listing states no grade, it says so rather than implying one. Cosmetic wear — dust, scratches, label marks — is normal on hardware that has been mining and is not a fault.

What should I check the day it arrives?

Photograph the pallet or box before you open it, keep the packaging, and run the 48-hour acceptance test straight away. Freight claim windows are short, and a fault found on day two is a conversation while a fault found on day thirty is an argument. Our own six-step bench procedure is published in full, so you can repeat exactly what we did.

Shipping cost for this exact item, and how warranty and returns work here, are answered in the Shipping & buying tab on this page. Anything else, ask a person on +1 (781) 577-0377 or ns@ingmining.com — we would rather talk before you buy.

What the boost does to your electricity bill

The 110 TH/s in this title is a firmware boost applied to a 95 TH/s machine, not a factory rating, and the watts go up with it. The clearest way to see what that costs is to fill a fixed megawatt with each: a megawatt of stock 95 TH/s S19s holds about 307 machines and produces 29.16 PH/s, while the same megawatt of boosted 110 TH/s S19s holds about 265 and produces 29.15 PH/s. Same power, same output, fewer machines to look after. At fixed power the boost moves your machine count, not your hashrate — it only buys you something if you have a hashrate target and spare power to hit it with.

So the figure to ask us for on this lot is the measured wall draw at the firmware these ship on, not the factory 3,250 W. Five machines is small enough that metering them is a reasonable request, and a written measured number is the only one that will ever match your bill. If the honest answer is that nobody has metered them, that is an acceptable answer and it should be written down as one rather than replaced with a datasheet.

Used S19s of either flavour break even at about 3.89 cents per kilowatt-hour on the hashprice derived at block 961,911 on 10 August 2026 on used ASIC miner fleet economics, which also carries the assumptions, the block height and the warning that all of it is a snapshot rather than a specification. Above your own break-even rate there is no slow payback, only a negative one, and no purchase price fixes that.

Related hardware and where this sits in the store

Other fleet lots and single units from the same family:

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

Ask for the measured wall draw before you size circuits for these: firmware-boosted units do not draw the stock 3,250 W. Our used-miner buying guide sets out the whole pre-purchase checklist, including board revision and pool-measured hashrate.

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.

Where this listing sits

This one is on the used and refurbished shelf. It is second-hand hardware. The grade for this specific unit is stated in the description on this page — and where a listing states no grade, it says so rather than implying one.

What our grades mean

These are the only words we use, and each one means a specific thing. They are not interchangeable and we do not soften them to move stock.

New	Unused stock. Factory sealed unless the listing says otherwise — “new, open box” means exactly that, and the listing will say it.
Tested working	Second-hand, and it ran on our bench at the hashrate the listing states. We measured it; we are not repeating what the last owner told us. Expect cosmetic wear.
Refurbished	Tested working, plus work done: cleaned, thermal paste and fans dealt with, failed components replaced. The listing says what was actually done to that unit rather than using the word as decoration.
As-is / for parts	Sold with no working claim at all, at a price that reflects it. Buy these to repair or to harvest. If a listing says as-is, assume it does not hash until you have proved otherwise.
Untested	We have it, we have not powered it, and we are not going to pretend we did. Rarer than as-is and always stated explicitly.

What a grade here does not mean

Cosmetic wear is not a fault. Dust, scratches, scuffed labels and discoloured plastics are normal on hardware that has been earning. We photograph what we have; if the pictures matter to you, ask for more and we will take them.
A grade is not a warranty. Warranty terms are stated per listing, never per store — see the Shipping & buying tab. A tested-working grade describes what the machine did on our bench, not what we owe you in six months.
A boosted hashrate is not a spec. Where a unit ships on tuned firmware we say so and we give the factory figures too, because overclocking raises power faster than it raises hashrate — a tuned machine is less efficient per terahash than stock, not more.
We will not invent a grade to fill a field. If a unit came in without history and has not been through the bench, its listing says that.

How the grade gets decided

A used-hardware seller who will not tell you how they test is asking you to take the grade on trust. Ours is published: the six-step bench procedure every machine goes through, and the five measurements that get recorded — per-board hashrate, chip count, measured wall power rather than the nameplate figure, hardware error rate, and temperature under sustained load. When it reaches you, run the 48-hour acceptance test straight away, while the freight claim window is still open.

Buying second-hand for the first time? How to buy a used ASIC miner without getting burned is the long version, written from the repair bench rather than from a spec sheet.

Shipping

This listing is quoted rather than priced, and freight is quoted with it. Tell us where it is going and we will confirm the shipping cost to that address with the price, before you pay — on a multi-unit or pallet order that is the only honest way to do it.

Outside the United States the checkout quotes a flat international rate. On multi-unit or pallet orders, contact us before ordering so freight to your destination can be confirmed properly. What to check when the pallet arrives, and how a freight claim works, is covered in the mining hardware shipping guide.

What to do the day it arrives

Photograph the pallet or the box before you open it, and keep the packaging until you are satisfied. Freight claim windows are short, and damage found on day two is a conversation while damage found on day thirty is an argument.

Then run the 48-hour acceptance test straight away, while that window is still open. It is the same ground our own bench covers, so you can compare like for like: how the grade on this listing was arrived at, and the five measurements we record, are set out in the Condition & grading tab on this page.

Condition, warranty and returns

Condition: Used — second-hand stock. The grade for this unit is on the listing above, and where a listing states no grade it says so.

Warranty is stated per listing, not across the catalogue. Some units carry a manufacturer term and say so above, naming the term and the date it runs from. Many units, particularly used and AS-IS stock, carry none, and those listings do not claim one. There is no blanket warranty covering a catalogue that runs from sealed factory stock to a hashboard sold for parts. For what a mining warranty normally covers, see ASIC miner warranty explained.

Returns: ask for the terms on this unit before you pay. No single returns window is published for the whole store, because the sensible terms on a tested working machine and on a board sold AS-IS for parts are not the same terms. Email or call and ask what applies to this exact item — it is a two-minute conversation and a great deal cheaper than a dispute.

Where you are going to run it

Two questions decide whether a machine like this works where you live, and neither of them is about the miner: can the circuit carry it, and what does your electricity cost? Most full-size machines here want a dedicated 240 V circuit and run at 70–75 dB continuously. A few do not — the Avalon Q publishes 45–65 dB and runs on 110–240 V — so read the voltage and noise figures on this listing rather than assuming. ASIC miner power requirements covers breaker sizing and what the install actually involves; cooling covers where the heat and the noise end up.

If your power is not genuinely cheap, hosting is the question to be asking instead of which miner to buy. Break-even electricity rate is hashprice divided by (24 × J/TH), and hashrate cancels out of it entirely — which is why a cheap old machine on expensive power loses money faster than an expensive new one does. The buying guide has the arithmetic; work out your own number before you buy anything.

If hosting is the answer, get written answers on three things before you sign: who pays for repairs, what the uptime commitment actually pays out when it is missed, and how curtailment is handled. A flat per-machine monthly rate is where most of the unpleasant surprises live. Types of mining farm compares the models and hosting versus cloud mining covers why owning the hardware is the better end of that trade. Ask us before you commit — it is a five-minute call and a great deal cheaper than a contract you cannot get out of.

What we do once it is racked, wherever that is. Deployment, firmware and monitoring are a service we run rather than a line on a page: pool and network setup, Braiins OS or VNish tuning, offline alerts, and board-level fault-finding when a machine stops hashing — ASIC mining consulting sets out what that covers. The hosting agreement itself is between you and the facility. What we can give you is the number most hosting disputes turn on: what this machine measured at the wall on our bench, so a shortfall on site is a figure to compare against rather than an argument about what it should have been doing.

Who you are buying from

ING Mining LLC, Hanson, Massachusetts. ING MINING® is a registered U.S. trademark; our marketplace feedback is on the reviews page and the longer version of who we are is on about. Reach a person on +1 (781) 577-0377 or ns@ingmining.com.

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

Antminer S19 95TH/s ASIC – Boost to 105TH/s (Braiins OS) – Refurbished

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

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Description