Lot of 5 Refurbished Antminer S19 95TH/s

Description

Five refurbished Antminer S19 units at the stock 95 TH/s on Braiins OS — 475 TH/s against 16.25 kW of connected load. This lot size exists to answer a question rather than to build a farm. Five machines is enough to measure what power actually costs you, what uptime you actually get and how much repair work you actually inherit, and few enough that learning all three is affordable. Anyone considering a hundred should buy five first.

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 units, in site terms

Hashrate: 475 TH/s at stock
Connected load: 16.25 kW continuous — about 13.5 A per machine at 240 V, so five dedicated circuits rather than one shared run
Freight: about 71 kg of miners net and about 80 kg gross once boxed (5 × Bitmain’s published 14.2 kg net / 16 kg gross)
Siting: 16.25 kW of heat and five fan stacks at ~75 dB — an outbuilding or garage with genuine airflow, not a utility cupboard

At five units, the condition grade matters more than the spec sheet

Here is the arithmetic that separates this listing from the pallet quantities: one dead machine is 20% of what you bought. On a hundred-unit pallet a handful of failures is absorbed by a spares float and forgotten. On five it is the difference between a good buy and a bad one, and there is no float to absorb it. The numbers above are Bitmain’s and they are not in dispute — what is worth pressing on before you order is what “refurbished and tested” commits us to for these five specific machines: the test method, the pool-measured hashrate rather than the figure the firmware reports about itself, and the hashboard revision in each.

About the Braiins firmware on these

They run Braiins OS at the factory 95 TH/s. That is the configuration in which the firmware earns its place: per-chip tuning claws back efficiency that stock firmware wastes by running every chip at the weakest one’s voltage. The trade only turns against you when the same tooling is used to push a machine past its rated output — then power rises faster than hashrate and the J/TH gets worse. These are not being pushed, so you get the upside. Note that third-party firmware voids any surviving manufacturer coverage, which on 2020 hardware has lapsed in any case.

What’s in the box

This listing does not say whether PSUs are supplied, so we are not claiming they are. S19s normally ship with a Bitmain APW12, but used stock sometimes moves bare. On five units that is a material fraction of the total cost, so confirm it before ordering — ask us about PSUs, cords and plug standard and we will answer in writing.

Condition and warranty

Sold refurbished and tested, and with no condition grade or warranty term stated in this listing we are not going to invent one. Ask for the grade, the DOA window and the return terms in writing before ordering. On a five-unit buy those terms are the single most valuable thing you can get in writing.

Who should buy this

First-time fleet buyers, and established operators qualifying a new site or a new power contract before scaling. If one dead unit out of five would sink your economics, ask us for the test results on the actual machines before you order — not after they arrive.

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.

Five machines is an audit of the seller, not a fleet

At five units the per-unit price is the worst you will see on this shelf, and the machines are not really the point. Five refurbished S19s is about 475 TH/s for roughly 16.25 kW at the factory rating — no electrical project at all. What you are actually buying at this size is evidence about the seller: whether the serials match, whether the grade survives contact with your bench, whether the freight arrives the way it was described, and whether anybody answers the phone when one of those goes wrong.

The thing that matters most here is the dead-on-arrival remedy, because one dead machine is a fifth of the order. We do not publish a dead-on-arrival rate — we have not measured one across enough lots to defend it in writing, and a flattering number would be worth less to you than this sentence. Settle the window, the remedy and who pays return freight before the order goes in, as three separate answers: replacement, refund, credit and parts are four different outcomes and only one of them is the one you are picturing. What a used batch from us does and does not commit us to is defined once, on bulk used ASIC miners.

Spares at five units are two line items rather than a shelf: an APW9/APW12 supply cable at $16.50 and a dual fan assembly at $24.99, both listed at on this store on 15 August 2026. A bad cable imitates a dead power supply convincingly enough to get a working machine scrapped, which is why it is the first thing to rule out and the cheapest. Before you send money, run the seller checks in how to vet an ASIC seller — including on us.

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.

Five machines is where a single dead unit is a fifth of what you bought, so a stated condition grade is worth more here than on a large pallet. Our guide to buying used ASIC miners covers what each grade commits a seller to and what to get in writing first.

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 95TH/s Miners – Braiins OS

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

Lot of 5 Refurbished Bitmain Antminer S19 95TH/s Miners – Braiins OS

Price:

Description