Bitmain A113D control board for Antminer S21 Pro, S21 XP and S21+ with 4 square 4-pin fan connectors - front angle view
Bitmain S21 Pro S21 XP S21+ A113D control board with power connectors and hashboard connection ports
Bitmain S21 Pro S21 XP S21+ A113D motherboard with RJ45 Ethernet port, micro USB and system buttons
Antminer S21 Pro S21 XP S21+ A113D control board - top view with Amlogic A113D processor
Antminer S21 Pro S21 XP S21+ A113D motherboard - rear side of the PCB with printed circuits and solder joints
Bitmain A113D control board for Antminer S21 Pro, S21 XP and S21+ with 4 square 4-pin fan connectors - front angle view
Bitmain S21 Pro S21 XP S21+ A113D control board with power connectors and hashboard connection ports
Bitmain S21 Pro S21 XP S21+ A113D motherboard with RJ45 Ethernet port, micro USB and system buttons
Antminer S21 Pro S21 XP S21+ A113D control board - top view with Amlogic A113D processor
Antminer S21 Pro S21 XP S21+ A113D motherboard - rear side of the PCB with printed circuits and solder joints
59,90€VAT incl. · no customs in the EU

Control Board for Antminer S21 Pro, S21 XP and S21+: Replacement Motherboard

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59,90€
59,90€
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Delivery

Standard delivery in 7 days
  • Price incl. VAT, no import fees
  • Brand new, manufacturer warranty, after-sales service in France
  • Tracked delivery to Austria and all 27 EU countries, no customs fees
New product
All products sold on this site are brand new, with no import fees and covered by the manufacturer warranty: 1 year on SHA-256 miners, 6 months on altcoin miners.
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Trustpilot

These reviews are posted by our customers on Trustpilot, an independent review platform. Here is a selection of our latest 4- and 5-star reviews, unedited and in their original language (French).

  • Verified

    Jean-Louis ·

    Livraison rapide

    Livraison rapide
    Produit neuf
    Emballage parfait

  • Verified

    Client M. ·

    Colis en retard dû a un manque de…

    Colis en retard dû a un manque de produit un produit supérieur envoyé à la place c est bien !

  • Verified

    Christophe M. ·

    Commande réalisé le 30/05

    Commande réalisée le 30/05 - reçu le 15/06. Le délai annoncé a été dépassé mais le service est impeccable et disponible pour prendre en charge ma demande, l’envoi est redemandé et reçu rapidement.
    J’espère ne pas avoir besoin du SAV - mais RAS sur le passage de commande, vous pouvez y aller!

  • Diatix ·

    Tres bon sav je recommande

  • Verified

    Stéphane D. ·

    Ma première expérience dans le minage…

    Ma première expérience dans le minage de crypto à était concluante et rassurante avec happymining
    Machine commander arriver dans les temps au bon endroit le paramétrage parfait sur la pool de mon choix
    L équipe happymining très patiente et plein de passions. Pour leurs metiers
    Expérience parfaite je conseil happymining

  • Maxime L. ·

    Service apres vente reactif et…

    Service apres vente reactif et efficace, totale confiance

  • Verified

    Nico ·

    Equipe disponible

    Equipe disponible, envoi conforme. Parfait

  • Verified

    Mathieu B. ·

    Transaction sérieuse et SAV top

    Au début j’étais méfiant mais au final transaction envoie et qualité du matériel au rdv.
    Le SAV est aussi au top je recommande.

  • Alexis T. ·

    Très satisfait

    Bonjour,

    J'ai reçu une première machine avec une alimentation défectueuse.
    Il mon rembourser puis j'ai recommandé une seconde machine qui fonctionne parfaitement.

    Je tien à souligner qu'ils sont très facilement joignable et agréable rien à redire pour le SAV.

    Je recommande.

  • Verified

    Fabrice ·

    5 SUR 5 AU TOP LEQUIPE HAPPY MINING

  • Verified

    Lionel P. ·

    le kit d'insonorisation de mineur S19…

    le kit d'insonorisation de mineur S19 est top et le service client est assez bien reactif

  • Verified

    Alan S. ·

    Très bien conseillé

    Très bien conseillé
    Bon produit et livraison rapide

See all our reviews on Trustpilot
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Description

Description

The Bitmain A113D (CB1) control board is a replacement motherboard dedicated to the Antminer S21 Pro, S21 XP and S21+ (SHA256, air-cooled).

It restores the operation of a machine showing a start-up fault, no network detection, a communication error with the hashboards or a system freeze caused by a faulty control board.

This version is exclusively for S21 Pro / S21+ / S21 XP models that use the large control board format.

A113D (CB1) control board specifications

Model A113D (CB1)
Compatibility Antminer S21 Pro / S21 XP / S21+ (SHA256, air-cooled)
Processor Amlogic A113D
Fan connectors 4 square 4-pin fan connectors
Data interface Micro USB
Preinstalled firmware Original official Bitmain firmware
Custom firmware Compatible with optimised firmware for automatic thermal management
Main function System management and communication with the hashboards
Weight ≈ 0.3 kg
Condition NEW
Use Replacement, maintenance or repair

Product information

This Antminer S21 Pro / S21 XP / S21+ control board fixes faults such as: no network detection, hashboards not recognised, unexpected reboots or a miner that will not start.

The official Bitmain firmware comes preinstalled. You can install custom firmware to improve stability and automatically optimise the miner’s thermal management.

Best practices

Installation must be carried out with the power off, by an experienced user or with guidance. If you have any doubts about the diagnosis or the replacement procedure, contact us before ordering.

Note: any firmware modification must be carried out by a qualified user.
Bitmain A113D control board for Antminer S21 Pro, S21 XP and S21+ with 4 square 4-pin fan connectors - front angle view

Control Board for Antminer S21 Pro, S21 XP and S21+: Replacement Motherboard

59,90€
Bitmain A113D control board for Antminer S21 Pro, S21 XP and S21+ with 4 square 4-pin fan connectors - front angle view
Bitmain S21 Pro S21 XP S21+ A113D control board with power connectors and hashboard connection ports
Bitmain S21 Pro S21 XP S21+ A113D motherboard with RJ45 Ethernet port, micro USB and system buttons
Antminer S21 Pro S21 XP S21+ A113D control board - top view with Amlogic A113D processor
Antminer S21 Pro S21 XP S21+ A113D motherboard - rear side of the PCB with printed circuits and solder joints

Control Board for Antminer S21 Pro, S21 XP and S21+: Replacement Motherboard

59,90€

Glossary for this product

The technical terms on this page, explained simply.

Full glossary →
  • Control board

    The control board is an ASIC's small computer: it runs the firmware, handles the network and drives the hashboards, fans and power supply.

  • Hashboard

    A hashboard is the circuit board in an ASIC that carries the computing chips. It is what produces the hashrate.

  • SHA-256

    SHA-256 is the hash function behind Bitcoin's proof of work. SHA-256 ASICs compute trillions of these hashes every second.

  • Firmware

    Firmware is the embedded software that runs a miner: chips, fans, power supply, pool connection and the web interface for settings.

  • Air cooling

    The most common cooling method: fans push ambient air through the miner's heatsinks to carry the heat away.

  • Fan

    The fan removes heat from an air-cooled miner. Its airflow is expressed in CFM and its speed follows the chip temperature.

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