Antminer B8 Hashboard Tester - EEPROM, Fan and PSU Test

Description

The Antminer B8 is a general-purpose Antminer test fixture that puts five bench jobs in one handheld unit: Quick Test, Custom Test, Fan Test, Power Test and EEPROM programming, driven from a colour LCD menu. It runs off USB Type-C — including from a power bank, which is what makes it a field tool rather than a bench-only one — with a separate 12 V barrel input used for fan testing. In the box: the main unit, an 18-pin data cable and a 4-pin data cable.

Antminer B8 tester — coverage as the vendor states it

Hashboards	19-series, 21-series and 17-series, plus L3 / L5 / L7 / L9 and S9 / S11 / S15
Power supplies	APW17-1215, APW12-1215, APW12-1417, APW11-1721, APW9 and APW8
Fans	DC 12 V 4-wire
Other functions	LM75A temperature sensor scanning, and EEPROM read and write
Five bench jobs	Quick Test, Custom Test, Fan Test, Power Test and EEPROM programming, from a colour LCD menu
Power	USB Type-C — including from a power bank, which is what makes it a field tool rather than a bench-only one. A separate 12 V barrel input is used for fan testing
In the box	The main unit, an 18-pin data cable and a 4-pin data cable
Whose list this is	The vendor’s stated coverage, repeated here. We have not verified every platform on it — ask about yours specifically
Condition and warranty	Not stated in this listing, so nothing here claims either. Ask before you buy and we will tell you what we actually have — new sealed, opened, bench-tested or untested — and put any coverage in writing

Coverage as the vendor states it: 19-series, 21-series and 17-series hashboards plus L3/L5/L7/L9 and S9/S11/S15; APW17-1215, APW12-1215, APW12-1417, APW11-1721, APW9 and APW8 power supplies; DC 12 V 4-wire fans; LM75A temperature sensor scanning; and EEPROM read and write.

We list this tester in two places. The longer write-up — in particular why the EEPROM read/write function is the reason to own this specific fixture — is on
the other B8 tester listing.

Condition and warranty

This listing does not state a condition grade or a warranty term, so we are not going to imply one. The parts and repair shelf carries both new spares and as-is units, so the category is not the answer either. Before you buy, ask us and we will tell you what we actually have — new sealed, opened, bench-tested, or untested — and put any coverage in writing. Ask us about this unit.

Questions buyers ask about this part

Is this a complete, working machine?

No. This listing is on the parts and repair shelf, which holds both brand-new spares and bench tools and as-is units sold for repair. Which of those this one is, is stated in the description above — read it before you order, and ask us on +1 (781) 577-0377 or ns@ingmining.com if anything about compatibility with your fleet is unclear. We would rather answer the question than take a return.

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.

Which fixture, not whether — and what $600 buys against the alternatives

At $600 this is 3.7 times the price of our cheapest used S19, which tells you immediately that it is not a one-machine purchase. It is a bench-and-field instrument, and the honest question is which one you need rather than whether a tester is worth owning. We carry four, and they are not interchangeable:

$199.99 — the universal Antminer test fixture, S9 through S19, hashboards only, serial log to a PC
$429.99 — the other B8, at $429.99, same B8 platform
$459.99 — the K3L hashboard tester, which reaches S21, T21, KS3 and KS5
$600 — this one: hashboards, APW8 through APW17 power supplies, fans, EEPROM read/write, off a USB-C power bank

Pick by what is actually in your racks. If your fleet is S19-generation and you never touch a power supply, the $199.99 unit does the job. If the power supply is your most common failure — and in the order we see faults it is first, ahead of fans, control boards and hashboards — a tester that cannot read a PSU is the wrong tool at any price. why mining hardware fails has that order; the parts compatibility guide has the payback arithmetic.

Machine and parts prices read off our own shelf on 16 August 2026. Parts only — we publish no bench labour rate, so nothing here is a fitted price.

Related hardware and where this sits in the store

Parts, fixtures and tools that go with the same repair job:

Category: Need Parts.

Where this listing sits

This one is on the parts and repair shelf. That shelf holds two different things: brand-new spares and bench tools, and as-is units sold for repair. Which of the two this listing is, is stated in its own description — read it before you order.

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: Repair part or bench tool — this shelf holds both new spares and as-is units, so read the condition stated in the description.

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.

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 B8 Hashboard Tester EEPROM Fan PSU Test Tool English Version

Antminer B8 Hashboard Tester EEPROM APW Power Supply Fan Test Fixture English

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