Antminer S21j XP Hyd
Bitmain · SHA-256
Antminer S21j XP Hyd
- Prefer not to pay everything at once? A 50% deposit is enough; the price is then 2% higher: deposit 74 000 Kč incl. VAT, and you pay the rest once the miner is on its way.
- The date reflects the factory production date plus a few days for shipping and customs.
- We set up the miner free of charge to mine into your wallet.
How the pre-order works
- You order online and receive an invoice – for the full amount or for a 50% deposit (price +2%).
- Once we receive payment, we order from the manufacturer.
- As soon as the miner has a tracking number, we let you know. With a deposit, you pay the rest at that point.
- You collect the miner in Prague, we ship it to you, or we connect it straight away on our hosting.
On our hosting
- Electricity for this machine
- –
- Profit after electricity
- –
One-off
- Installation and services
- –
- Shipping to the data centre
- –
- Customs and fees by location
- –
- 7-year warranty on hosting
- Option to split the payment into 4 instalments
Excluding optional services; you will see the final price in the hosting order.
Order on hosting ↗ (opens in a new tab)Choose a location, sign up and pay by crypto, bank transfer or in instalments.
What it can mine
- Bitcoin≈ 388 Kč/day
- Bitcoin Cash≈ 377 Kč/day
- Bitcoin SV≈ 369 Kč/day
- eCash≈ 411 Kč/daymost profitable today
- Fractal Bitcoin≈ 378 Kč/day
- DigiByte≈ 269 Kč/day
- Quai≈ 388 Kč/day
Gross revenue before electricity, based on today’s difficulty and exchange rate. Coins without an amount are not calculated yet.
Suitable for
- Hosting
- Workshop – with a water loop
- Flat – needs a cooling loop
Current hosting prices · 22/10/2026Let it mine with us
The miner goes from the supplier straight to the data centre. We connect it and look after it; you just follow the earnings.
- from 1.14 Kč/kWhelectricity incl. management · with prepayment up to −30%
- 7-year warrantywhile the miner runs with us (at home 2 years)
- 7 data centresto choose from, uptime up to 99.85%
- 0 dB at home50 dB of noise stays in the data centre
Technical specifications
- Manufacturer
- Bitmain
- Algorithm
- SHA-256
- Coins
- Bitcoin, Bitcoin Cash, Bitcoin SV, DigiByte, eCash, Fractal Bitcoin, Quai
- Hashrate
- 495 TH/s
- Power draw
- 5940 W
- Efficiency
- 12.0 J/TH
- Cooling
- Hydro
- Noise level
- 50 dB
- Power supply
- 380–415 V, 3-phase
- Condition
- New
- Warranty
- 24 months · 84 months when hosted with us
How much it earns
Enter your tariff. The default value is an example.
Revenue based on the current network difficulty and exchange rate, updated 24/10/2026 21:59. We use today’s revenue. In reality it changes with network difficulty, the exchange rate and halvings, so treat multi-year figures as indicative. Pool fees are not included.
- Personal collectionPrague 10
- ASIC miner repairsright here in Prague
- Pay by bank transfer or in cryptoBank transfer (CZK / €), USDT/USDC or cash at the shop
- VAT invoicereverse charge for EU businesses
Description
The Antminer S21j XP Hyd is a water-cooled mining machine from Bitmain for the SHA-256 algorithm (Bitcoin, Bitcoin Cash). Hashrate 495 TH/s, power draw 5940 W, efficiency 12 J/TH. Best suited to a data centre – with us you can run it straight away in our hosting.
Use the calculator below to see how much it earns at the current exchange rate and electricity price.
Setup guide
We will set it up for you free of charge. Send us your wallet address and the miner will mine for you alone. If you do not have a wallet yet, we will help you create one.
Setting up an Antminer (Bitmain) minerDefault login: root / root
