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A Bitmain Antminer S19K Pro standing on its shipping box in a storage room, control panel and fan grille facing the camera.
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Bitmain Antminer K7 63.5T 3080W – High-Efficiency CKB Miner

The Bitmain Antminer K7 63.5T 3080W is a powerful ASIC miner designed for Nervos (CKB). It delivers a high hashrate of 63.5 TH/s with only 3080W power use, ensuring efficient mining and strong profitability. Sold by ING Mining. Warranty on this one is Bitmain’s own term rather than a term of ours — Bitmain publishes generally 180 days on new miners outside the 19 series, counted from its official dispatch date — and what is left on a specific unit is checkable against its serial number before you pay.

Key specifications

Hashrate
63.5 TH/s ±3%
Power draw
3080 W ±10%
Efficiency
48.5 J/TH
Input voltage
200–240V
Cooling
4 high-speed fans
Noise
75 dB
Full specification table

Buying from ING Mining

  • PriceQuoted, not listedWe price this on condition, quantity and freight to your address. Call or email for current price and availability.
  • FreightQuoted with the unitFreight to your address is confirmed with the price, before you pay — multi-unit and pallet orders included.
  • ConditionNewAs described on this listing.
  • GradingGraded before listingThis unit’s own grade is in the description above — where a listing states none, it says so. The six-step bench procedure behind a grade is published in full.
  • WarrantyStated per unit, not per storeAny term for this machine is in the description above. Ask for the return terms on this exact unit before you pay — full terms are in the Shipping & buying tab below.
Get a price+1 (781) 577-0377ns@ingmining.comwho we are

Sold by ING Mining LLC — ING MINING® is a registered U.S. trademark.

Price:

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  • Condition graded per unit: new, tested working, refurbished or as-is
  • Warranty and returns stated per unit, not per store
  • Ships UPS Ground within 7 business days

Description

The Bitmain Antminer K7 63.5T 3080W is one of the most efficient ASIC miners for the Nervos (CKB) blockchain. Designed by Bitmain, this miner runs on the Eaglesong algorithm and delivers a massive 63.5 TH/s hashrate with just 3080W power consumption. It’s built for miners who want top performance and stable long-term returns. With its improved power efficiency of 48.5 J/TH, the Antminer K7 63.5T reduces operational costs while maintaining excellent thermal control. The dual-fan cooling system and durable aluminum body make it ideal for 24/7 mining in professional environments or home setups. The compact design (430 × 195 × 290 mm) allows for easy rack mounting and smooth airflow.

Specifications

Model Bitmain Antminer K7 63.5T
Algorithm Eaglesong
Coins mined Nervos (CKB)
Hashrate 63.5 TH/s ±3%
Power consumption 3080 W ±10%
Efficiency 48.5 J/TH
Input voltage 200–240V
Cooling 4 high-speed fans
Noise 75 dB
Operating temperature 0°C – 40°C
Dimensions 430 × 195 × 290 mm
Weight 16.1 kg

What’s in the box

  • 1 × Bitmain Antminer K7 63.5T
  • 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

The K7 63.5T 3080W provides a competitive edge for CKB miners looking to maximize efficiency and uptime. It’s easy to set up, runs on stable firmware, and integrates seamlessly with top mining pools. This model is part of Bitmain’s next-generation lineup, built for long-term performance. To check current profitability rates for Nervos mining, visit WhatToMine. For verified stock and global shipping, explore ING Mining — your trusted supplier for new and used ASIC miners worldwide. *Performance results depend on firmware version, temperature, and power quality.*

Questions buyers ask about this machine

Will this run on a normal household outlet?

No. This machine needs a dedicated 200–240 V circuit. A North American 120 V household outlet will not run it under any adapter or configuration. At 3,080 W it draws about 12.8 A at 240 V, so the circuit wants a 20 A breaker — continuous loads are sized at 125% under the NEC, and a miner is the textbook continuous load. Size for your actual supply voltage, not ours: the same load on a 208 V feed draws more current, not less. Have an electrician confirm the supply before the pallet arrives.

What will it cost to run?

That depends on your electricity rate, so here is the part we can state exactly: at 3,080 W running 24/7, this machine burns about 2,218 kWh a month. Multiply that by your own all-in rate per kWh — including delivery charges, not just the supply rate — to get your monthly power bill. We do not publish profitability figures, because they change with difficulty and price every day.

How loud is it?

75 dB — 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 can I mine with it?

It mines Nervos (CKB). The algorithm is Eaglesong, and ASIC silicon is single-purpose: it will mine coins on that algorithm and nothing else, whatever the price of anything else does.

Is this a new unit?

Yes — new stock, as described in this listing. Any manufacturer warranty term that applies is stated in the description above; where none is stated, none is claimed.

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.

Related hardware and where this sits in the store

Other non-SHA-256 machines for the same algorithms:

Categories: New ASIC miners, XTM/ALEO/KAS/Dash/CKB Miner, Air Cooling and Bitmain Antminer.

Where this sits: 63.5 TH/s at 48.5 J/TH makes this one of 2 Nervos CKB machines we stock, all of them at that same figure, and the power alone runs $7.39 a day at $0.10/kWh. Nothing we stock in its cooling class turns a watt into more work than this, so the choice against its shelf-mates is hashrate and price, not efficiency. Every row is on the altcoin comparison table.




Where this listing sits

This one is on the new shelf. New stock, as described in the listing. Any manufacturer warranty term that applies is named in the description; where none is named, none is claimed.

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.

NewUnused stock. Factory sealed unless the listing says otherwise — “new, open box” means exactly that, and the listing will say it.
Tested workingSecond-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.
RefurbishedTested 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 partsSold 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.
UntestedWe 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: New — as described on this listing.

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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