Lot of 10 Refurbished Antminer S19 95TH/s

Description

Ten refurbished Antminer S19 miners, factory-rated 95 TH/s and supplied tuned toward 105 TH/s on Braiins OS. Of everything on this page, the number worth your attention is the one the old copy omitted: the tuned machines draw more than the 3,250 W on Bitmain’s sheet, so a lot of ten is not the 32.5 kW install you would plan from the specification.

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

The 105 TH/s figure, and the watts that come with it

The measured wall draw at 105 TH/s is not stated in this listing, and we would rather give you a number you can build on than one we made up. Take the floor instead: at the factory efficiency of 34.2 J/TH, producing 105 TH/s would require 3,250 W × (105 ÷ 95) = about 3,592 W per machine. Overclocking degrades efficiency rather than preserving it, so the actual draw sits above 3,592 W, never below. Across ten units that is a minimum of 35.9 kW against the 32.5 kW you would have planned from the stock figure — a 3.4 kW hole in the install, discovered after the electrician has left. Ask us to meter your ten and we will send the measured figure in writing before you specify anything.

Why a boost cannot also be a saving

Listings for tuned miners routinely claim the firmware raises hashrate and lowers consumption at the same time. It cannot do both on the same silicon. What Braiins OS really does is tune each chip individually instead of driving an entire hashboard at the voltage its worst chip needs, and at or near the factory hashrate that is a real efficiency gain. Spend that headroom on extra terahashes, as these ten have, and you are trading J/TH for output: you are buying hashrate, not efficiency. That is a perfectly reasonable trade on cheap power and a poor one on expensive power. Third-party firmware also voids any remaining Bitmain coverage, long expired on 2020 hardware.

Ten units, in site terms

Hashrate	950 TH/s at stock, around 1.05 PH/s tuned
Connected load	32.5 kW stock, at least 35.9 kW tuned — size on the tuned figure
Circuits	~13.5 A per machine at 240 V stock, ~15 A tuned; a continuous-load derate puts that at the edge of a 20 A circuit
Freight	about 142 kg of miners net and about 160 kg gross once boxed (10 × Bitmain’s published 14.2 kg net / 16 kg gross) — palletised, not parcel
Input voltage	200–277 V AC only. Ten S19s cannot run from household 110 V sockets in any configuration

Condition — the refurbishment process, as stated

These are described as professionally refurbished: deep-cleaned and hand-washed, fitted with new fan covers, parts replaced as needed, and performance-tested for one hour before shipping. That is a genuine, specific process and it is more than most used listings will commit to in writing. It is not a factory rebuild, and it does not make a 2020 machine new — expect cosmetic wear consistent with hardware that has been mining for years.

Warranty

This lot carries ING Mining’s 30-day guarantee. Ask us to confirm exactly what it covers — DOA replacement, hashrate shortfall, or both — in writing before you order, so that expectation is documented rather than assumed.

What’s in the box

Whether power supplies are included is not stated in this listing, so we are not claiming they are. Confirm PSUs, cords and plug standard with us in writing before ordering. Ten bare miners and ten complete ones are very different purchases.

Who should buy this

Operators past the proving stage, with a site and a known power cost, who want a meaningful block of hashrate without committing to pallet quantities. Ten is roughly where dedicated circuits and palletised freight stop being optional.

Ten S19s is 950 TH/s and 32.5 kW of connected load. Whether that earns depends entirely on your power price, so run the numbers in the ASIC miner buying guide before you commit to the freight.

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.

Ten machines, and the number that decides the outcome

Ten stock S19s is about 950 TH/s for roughly 32.5 kW at the factory rating — the first size on this shelf that is palletised freight rather than boxes, and the first where the sticker price stops being the number that decides anything. That number is total fleet J/TH, and you compute it the same way every time: total watts measured at the wall divided by total terahash at the pool. Not the average of the listings, and not the 34.2 J/TH in the table above, which assumes a healthy machine at a specified ambient temperature.

Two things move a real fleet away from that figure and both move it the same way. A machine with one dead hashboard still boots, still appears on your dashboard and still hashes at roughly two thirds — while its power does not fall by a third, because the fans, the control board and the supply overhead do not care how many boards are working. And a six-year-old machine in a warm room draws more than a rated one. Both look healthy on a hashrate report. Meter them, or pull them.

What putting that right costs is on our own shelf, which is the only repair-cost claim we can make that you can check for yourself: $16.50 for a supply cable, $24.99 for a dual fan assembly, $59.99 for a tested control board and $59.99 for a tested working S19 hashboard, all listed at on this store on 15 August 2026. The whole ladder for an S19 sits under $180, which is the reason a six-year-old chip family still has a market. Which failures come first, and when a repair stops being worth doing at all, is worked through in used vs new ASIC miners.

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.

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.

Additional information

Weight	33 lbs
Dimensions	18 × 14 × 12 in

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Price:

Description

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