Antminer S19 95TH/s Refurbished - Braiins OS to 105TH/s

Description

Read this before you order from this page. This refurbished Antminer S19 95TH/s is listed twice on this site at two very different prices, and the two listings have not been reconciled — the second listing carries the same specification. This page’s web address is also left over from an older listing for a lot of ten machines; what is described below is one machine. Please do not order here without calling +1 (781) 577-0377 or emailing ns@ingmining.com first, and we will confirm in writing what you would receive and what it costs.

Specifications

Model	Antminer S19 95TH/s
Algorithm	SHA-256
Coins mined	Bitcoin (BTC); the listing also notes Fractal Bitcoin (FB) compatibility
Hashrate	95 TH/s stock, tuned toward 105 TH/s on Braiins OS
Power consumption	3,250 W ±5% at the stock 95 TH/s. We do not publish a wattage for the 105 TH/s tune because it depends on the tune — ask and we will read it off the bench meter for the actual unit
Efficiency	34.2 J/TH at stock. Tuned up it gets worse, not better
Input voltage	240 V — this is not a 120 V machine
Firmware	Braiins OS, installed
Condition	Refurbished — high-PSI cleaned, parts replaced as needed, new fan covers, one hour of testing
Size and 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, the 95 TH/s bin). Freight is quoted on the gross weight, not the net

What’s in the box

1 × Antminer S19 95TH/s
Braiins OS, 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

Antminers Requires 240V The Antminer’s S19 95TH/s is a powerful ASIC miner designed for efficient Bitcoin mining, perfect for both new and experienced miners. Equipped with Braiins OS, this miner is tuned toward 105TH/s. That buys output, not efficiency: pushing an S19 past stock draws more watts per terahash, not fewer, so a boosted unit costs more per TH to run than the 34.2 J/TH it manages at 95 TH/s. You are buying hashrate, and paying for it in power. Our refurbishing process includes thorough cleaning, part replacements as needed, and installation of new fan covers for improved cooling and durability. Each unit gets a full hour on test before it ships. What that hour produces is a set of measurements — per-board hashrate, chips found per board, power at the wall, hardware error rate and temperature under sustained load — rather than a promise about how the machine will behave on your site, which depends on your ambient, your voltage and your tune. Features:

Hash Rate: 95 TH/s stock, tuned toward 105 TH/s with Braiins OS
Per-chip tuning: Braiins OS tunes each chip to its own voltage and frequency curve instead of running the whole board at one setting
Dual Mining: Compatible with Fractal Bitcoin (FB) for extended mining options
Refurbishment: High PSI cleaning, part replacement, hand wash with Dawn soap, new fan covers
Reliability: 1-hour testing ensures top-tier performance and stability

Why Choose the Antminer S19 95TH/s?

34.2 J/TH at stock — S19-generation efficiency, which is the honest frame for this machine
Easily configurable for stock or boosted settings
30-day guarantee — ask us to confirm in writing exactly what it covers on this unit: DOA replacement, a hashrate shortfall, or both

For detailed mining pool setup with Fractal Bitcoin, please consult the guides on f2pool’s website. The rest of our refurbished stock is on the used and refurbished shelf. What is Braiins OS? Braiins OS is an open-source mining firmware specifically designed to enhance the performance, efficiency, and control of Bitcoin mining hardware. Unlike standard firmware, Braiins OS optimizes each individual chip within the miner, which lets you choose where on the power-versus-hashrate curve the machine sits. Tuned up (here, 95TH/s toward 105TH/s) it buys hashrate and spends efficiency; tuned down it does the reverse and can genuinely lower the power bill. The choice is what is valuable — no firmware makes the same silicon produce more hashes for fewer joules. Additionally, Braiins OS provides detailed monitoring and control features, giving miners more visibility into operational metrics, including temperature, power draw, and individual chip performance. It’s a preferred choice for miners looking to maximize efficiency, extend equipment lifespan, and reduce operational expenses.

Questions buyers ask about this machine

Will this run on a normal household outlet?

No. This machine needs a dedicated 240 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?

It mines Bitcoin (BTC); the listing also notes Fractal Bitcoin (FB) compatibility. The algorithm is SHA-256, 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.

Is it worth repairing, and does used still win at this price?

Take the arithmetic on this page’s own price seriously, because it is the reason we ask you to call first. At $3,499.99 a 95 TH/s S19 is $36.84 per terahash. A new S21 Pro 245T at $4,200 is $17.14 per terahash and runs at roughly 15 J/TH against this machine’s 34.2. At the price shown here the used case does not survive contact with the numbers — it is made at the other listing’s price, not this one, which is exactly why nothing on this page asks you to order without speaking to us. Used hardware wins on capital per terahash or it does not win at all; we are not going to argue it wins on anything else.

What a repair costs, since it decides what this machine is actually worth: a tested-working S19 95 TH/s hashboard is $59.99, a tested ctrl_C55 control board $59.99, a S19/S20/S21 dual fan assembly $24.99, an APW9/APW12 power cable $16.50, a S19 Pro 110 TH/s board set $169.99 and an APW12-class 5,600 W supply $349.99. The entire failure ladder for an S19 sits under $180 for the parts that are worth fitting, which tells you what the intact machine is worth better than any listing does. used vs new ASIC miners has the full ladder and the two gates a used purchase has to clear; how to buy a used ASIC miner is the pre-purchase checklist.

Parts prices are our own shelf, read on 16 August 2026, and they are parts only — we do not publish a bench labour rate, so nothing here pretends to be a fitted price.

Related hardware and where this sits in the store

Other used and refurbished units currently on the floor:

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

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

Shipping this item inside the United States costs $49.99 by UPS Ground — that is the rate the checkout will charge, read from the store’s own shipping settings, not an estimate. Orders ship within 7 business days.

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

Price:

Description

Specifications

What’s in the box

Questions buyers ask about this machine