Lot of 50 Refurbished Antminer S19 95TH/s

Description

Fifty refurbished Antminer S19 units at 95 TH/s, running VNish OS. Approximately 4.75 PH/s for around 163 kW at the factory rating. Refurbished is a real grade here, not a marketing word — ask us what was actually done to these and we will tell you.

Per-unit specifications (Antminer S19 95TH/s)

Hashrate (factory)	95 TH/s ±5%
Power at the wall (factory)	3,250 W ±5%
Efficiency (factory)	34.2 J/TH
Algorithm	SHA-256 (Bitcoin)
ASIC chip	BM1398BB, 7 nm
Hashboards	3 boards × 76 chips = 228 chips
Power supply	Integrated APW12
Input voltage	200–277 V AC
Cooling / noise	4 fans, approx. 75 dB
Operating temperature	5–40 °C
Dimensions / weight	400 × 195.5 × 290 mm bare, 570 × 316 × 430 mm boxed. 14.2 kg net, 16 kg gross — Bitmain’s published S19 specification (model 240-Ca). Freight is billed on the gross weight, not the net
Network	Ethernet (RJ45)

What’s in the box

50 × Antminer S19 95TH/s SHA-256 — this listing is the whole lot, not one machine from it
VNish firmware, already installed and configured
Nothing that is not listed above. Cords, controllers, brackets and spares are only included when this listing names them — if you need to know before you pay, ask on +1 (781) 577-0377 or ns@ingmining.com and we will confirm in writing what is physically in the crate

Lot-level arithmetic

Units	50
Total hashrate	Approx. 4.75 PH/s at factory rating
Total connected load	Approx. 163 kW at factory rating
Shipping weight	Approx. 710 kg net and about 800 kg gross once boxed (50 × Bitmain’s published 14.2 kg net / 16 kg gross). LTL is priced on the gross weight

What VNish OS changes

VNish is third-party firmware that replaces Bitmain’s stock image and gives you per-chip autotuning, so you can run the fleet harder for more hashrate or softer for better J/TH, and you get far better telemetry when something starts to go wrong. Two things to know going in: third-party firmware voids any remaining manufacturer warranty, and pushing frequency raises board temperature, which is the thing that actually kills S19 hashboards over time. On a fleet this size, tune for efficiency and longevity rather than for a headline hashrate number — the boards you do not have to replace are worth more than the terahashes you squeeze out.

Ask us what tune these are shipping on and what the measured wall draw is. We will not guess at it in a product description.

Condition

Sold as refurbished. Before you order, get from us in writing: what was replaced or reworked, whether boards were recapped or re-pasted, the test duration and pass criteria, and what warranty we are putting on the lot. A seller who cannot answer those four questions is selling you used, not refurbished.

Power and siting — read this before you buy

An S19 is a 200–277 V AC machine. It will not run on a standard North American 120 V outlet, and at roughly 3.25 kW it needs a dedicated 240 V circuit with real headroom — a 20 A 240 V breaker per machine is the practical floor. It is also a genuinely loud industrial appliance at about 75 dB. This is a shed, garage, warehouse or hosted-facility miner, not a living-room miner. If you want something you can put in a house, look at the Avalon Q instead.

Stock spares before the units land — hashboards, fan assemblies, PSUs and control boards are the four things that fail on an S19 fleet.

Buying from ING Mining

We buy, repair, host and resell this hardware ourselves, so ask us the awkward questions before you order — power draw at the wall, board revision, what the fans sound like in a garage. Browse the rest of the catalogue at all miners.

Fifty S19s is roughly 4.75 PH/s and about 162 kW of connected load — a substation conversation, not an extension cord. Size it with the arithmetic in the ASIC miner buying guide.

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.

What can I mine with it?

The algorithm is SHA-256 (Bitcoin), and ASIC silicon is single-purpose: it will mine coins on that algorithm and nothing else, whatever the price of anything else does.

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.

Fifty machines, and what happens when you mix them with what you own

Fifty stock S19s is about 4.75 PH/s for around 163 kW at the factory rating. If this is the whole fleet, your blended efficiency is roughly the listing figure and the sums are easy. If you are adding it to machines you already run, do the arithmetic the right way round, because averaging the listings gets it wrong in the direction that flatters you.

Worked on our own numbers: put a hundred 95 TH/s S19s beside twenty S19k Pros and the average of the two efficiency figures says 28.6 J/TH. The fleet is actually 32.0 — 377.9 kW producing 11,800 TH/s — because the inefficient machines are also most of your hashrate. That is the difference between a break-even rate of 4.65 cents and one of 4.15, which is the difference between signing a power contract and not signing it. Blend by terahash, never by listing.

The only efficiency figure that ever appears on a bill is total watts at the wall over total terahash at the pool, measured on the same machines at the same time. How to compute it for a mixed fleet, and the payback it produces at three, five and seven cents a kilowatt-hour, is on used ASIC miner fleet economics. Why the machines drift off their ratings in the first place — heat, dust and a power supply that has run hot for years — is in why mining hardware fails.

Related hardware and where this sits in the store

Other fleet lots and single units from the same family:

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

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.

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Lot of 50 Refurbished Bitmain Antminer S19 95TH/s Miners – VNish OS

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Description

Per-unit specifications (Antminer S19 95TH/s)

What’s in the box