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PRIME
B840-PLUS
WIFI

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Summary of Contents for Asus PRIME B840-PLUS WIFI

  • Page 1 PRIME B840-PLUS WIFI...
  • Page 2 Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing by ASUS; or (2) the serial number of the product is defaced or missing.
  • Page 3 Contents Safety information ....................... 4 About this guide ......................6 Package contents ......................8 PRIME B840-PLUS WIFI specifications summary ............ 9 Connectors with shared bandwidth ................ 13 Chapter 1: Product Introduction Before you proceed ..................14 Motherboard layout..................15 1.2.1 Layout contents ................
  • Page 4 Safety information Electrical safety • To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system. • When adding or removing devices to or from the system, ensure that the power cables for the devices are unplugged before the signal cables are connected. If possible, disconnect all power cables from the existing system before you add a device.
  • Page 5 Button/Coin Batteries Safety Information Remove and immediately recycle or dispose of used batteries according to local regulations and keep out of reach of children. Do not incinerate or dispose of batteries in household trash. If ingested or inserted inside any part of the body, call a local poison control center for treatment information.
  • Page 6 Refer to the following sources for additional information and for product and software updates. ASUS website The ASUS website (www.asus.com) provides updated information on ASUS hardware and software products. Optional documentation Your product package may include optional documentation, such as warranty flyers, that may have been added by your dealer.
  • Page 7 RAID Configuration Guide Please visit https://www.asus.com/support for more information on the RAID Configuration Guide. BIOS FlashBack™ Feature Please visit https://www.asus.com/support for more information on the BIOS FlashBack™ Feature. Conventions used in this guide To ensure that you perform certain tasks properly, take note of the following notes used throughout this user guide.
  • Page 8 Package contents Check your motherboard package for the following items. Motherboard 1 x PRIME B840-PLUS WIFI motherboard Cables 2 x SATA 6Gb/s cables 1 x ASUS WiFi Q-Antenna Miscellaneous 1 x M.2 rubber package 3 x Screw packages for M.2 SSD...
  • Page 9 PRIME B840-PLUS WIFI specifications summary AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* * Refer to https://www.asus.com/support/download-center/ for CPU support list. Chipset AMD B840 Chipset 4 x DIMM slots, max. 192GB, DDR5 Support up to 7600+MT/s (OC) with Ryzen™ 9000 & 8000 & 7000 Series...
  • Page 10 PRIME B840-PLUS WIFI specifications summary AMD B840 Chipset - M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 mode) - 4 x SATA 6Gb/s ports * Specifications vary by CPU types. Storage AMD RAIDXpert2 Technology Ryzen™ 9000 Series Processors: RAID 0/1/5/10 Ryzen™...
  • Page 11 PRIME B840-PLUS WIFI specifications summary Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan headers Power Related 1 x 24-pin Main Power connector...
  • Page 12 Windows 11, Windows 10 64-bit ATX Form Factor Form Factor 12 inch x 9.6 inch ( 30.5 cm x 24.4 cm ) NOTE: Specifications are subject to change without notice. Please refer to the ASUS website for the latest specifications.
  • Page 13 Connectors with shared bandwidth CPU_OPT AIO_PUMP CPU_FAN CPU_12V_2 CPU_12V_1 HDMI_DP BIOS_FLBK FLBK_LED1 USB_E123_5 U10G_6 U10G_C2 SOCKET AM5 LAN_U5G_34 M.2(WIFI) CHA_FAN1 AUDIO M.2_1(SOCKET3) 2280 PCIEX16(G4) PCIEX16(G3)_1 M.2_2(SOCKET3) BATTERY 2280 B840 PCIEX16(G3)_2 M.2_3(SOCKET3) PCIEX1(G3) 2280 2260 2242 PCIEX16(G3)_3 SPDIF_OUT TB(USB4)_HEADER CHA_FAN3 USB_1213 USB_1415 SATA6G_1 SATA6G_2 F_PANEL CHA_FAN2...
  • Page 14 Chapter 1: Product Introduction Product Introduction Before you proceed Take note of the following precautions before you install motherboard components or change any motherboard settings. CAUTION! • Unplug the power cord from the wall socket before touching any component. • Before handling components, use a grounded wrist strap or touch a safely grounded object or a metal object, such as the power supply case, to avoid damaging them due to static electricity.
  • Page 15 Motherboard layout CPU_OPT CPU_FAN AIO_PUMP CPU_12V_2 CPU_12V_1 HDMI_DP BIOS_FLBK FLBK_LED1 USB_E123_5 U10G_6 U10G_C2 SOCKET AM5 LAN_U5G_34 M.2(WIFI) CHA_FAN1 AUDIO M.2_1(SOCKET3) 2280 PCIEX16(G4) PCIEX16(G3)_1 M.2_2(SOCKET3) BATTERY 2280 B840 PCIEX16(G3)_2 M.2_3(SOCKET3) PCIEX1(G3) 2280 2260 2242 PCIEX16(G3)_3 SPDIF_OUT TB(USB4)_HEADER CHA_FAN3 USB_1213 CHA_FAN2 CHA_FAN4 USB_1415 SATA6G_1 SATA6G_2 F_PANEL CLRTC...
  • Page 16 M.2 X16 series card is installed. • For more details on the PCIe bifurcation, you may visit the support site at https://www.asus.com/support/FAQ/1037507/. • Adjust the PCIe bifurcation under BIOS settings. • Enable the Hyper M.2 X16 series card under BlOS settings.
  • Page 17 NOTE: • When connecting a single CPU fan, you may connect it to either the CPU_FAN or CPU_OPT header. • When connecting two CPU fans, ensure to connect the fans to the CPU_FAN and the CPU_ OPT header, and make sure both fans are the same brand and model. Header Max.
  • Page 18 NOTE: • AMD Ryzen™ 9000 & 7000 Series Desktop Processors: M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) • AMD Ryzen™ 8000 Series Desktop Processors: M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)* •...
  • Page 19 CAUTION! Before you install or remove any component, ensure that the power supply is switched off or the power cord is detached from the power supply. Failure to do so may cause severe damage to the motherboard, peripherals, or components. NOTE: •...
  • Page 20 16. S/PDIF Out header The S/PDIF Out header allows you to connect the Sony/Philips Digital Interface (S/PDIF) Out module. 17. TPM header The TPM header allows you to connect a TPM module, which securely stores keys, digital certificates, passwords, and data. A TPM system also helps enhance network security, protect digital identities, and ensures platform integrity.
  • Page 21 1.2.2 Rear I/O connection Rear panel connectors DisplayPort USB 2.0 ports E1, E2, and E3 USB 10Gbps (Teal blue) Type-A port 6 Realtek 2.5Gb Ethernet port* Wi-Fi module Audio jacks** HDMI™ port BIOS FlashBack™ button USB 2.0 port 5 with BIOS FlashBack™ feature USB 10Gbps (Type-C ) port C2 ®...
  • Page 22 1.2.3 LAN port LEDs Realtek 2.5Gb Ethernet port LED indications ACT/LINK SPEED Activity Link LED Speed LED Status Description Status Description No link No link 2.5 Gbps connection GREEN Linked GREEN LAN port 1 Gbps / 100 Mbps / BLINKING Data activity ORANGE 10 Mbps connection...
  • Page 23 IMPORTANT! Install a heatsink or AIO cooler after installing the CPU. Please refer to the Motherboard Installation Guide on the ASUS support site, or to the user manual of the heatsink/ AIO cooler for steps on installing the heatsink/AIO cooler.
  • Page 24 • Always install the DIMMs with the same CAS Latency. For an optimum compatibility, we recommend that you install memory modules of the same version or data code (D/C) from the same vendor. Check with the vendor to get the correct memory modules. • Visit the ASUS website for the latest QVL.
  • Page 25 Installing a DIMM Removing a DIMM...
  • Page 26 M.2 module installation NOTE: • The illustrations only show the installation steps for selected M.2 slots, the steps are the same for the other M.2 slots. • Use a Phillips screwdriver when removing or installing the screws or screw stands mentioned in this section.
  • Page 27 Install your M.2 module to the M.2 slot. IMPORTANT! Ensure that there is nothing obstructing your M.2 module when installing the M.2 module to the M.2 slot. Remove the plastic film from the thermal pads on the bottom of the heatsink. NOTE: If the thermal pad on the M.2 heatsink becomes damaged, we recommend replacing it with a thermal pad with a thickness of 1.25mm.
  • Page 28 Installing an M.2 module to the M.2_3 slot Install the bundled screw stand to the M.2 length screw hole you wish to install your M.2 module to. Install your M.2 module to the M.2 slot. Secure your M.2 module using the bundled screw stand’s screw.
  • Page 29 ASUS WiFi Q-Antenna installation Installing the ASUS WiFi Q-Antenna Connect the bundled ASUS WiFi Q-Antenna connector to the Wi-Fi ports at the back of the chassis. CAUTION! • Ensure to hold tightly onto the connector when removing the antenna connector from the Wi-Fi ports, and refrain from attempting to remove the antenna connector from the Wi-Fi ports by pulling on the antenna connector cable.
  • Page 30 USB storage device and filename/file format error. If this scenario happens, please restart the system to turn off the light. • Updating BIOS may have risks. If the BIOS program is damaged during the process and results to the system’s failure to boot up, please contact your local ASUS Service Center.
  • Page 31 BIOS and RAID Support NOTE: For more details on BIOS and RAID configurations, please refer to Manual & Document under the Support tab of the product information site, or visit https://www.asus.com/support. Knowing UEFI BIOS BIOS (Basic Input and Output System) stores system hardware settings such as storage device configuration, overclocking settings, advanced power management, and boot device configuration that are needed for system startup in the motherboard CMOS.
  • Page 32 ASUS EZ Flash 3 The ASUS EZ Flash 3 feature allows you to update the BIOS without using an OS-based utility. IMPORTANT! Ensure to load the BIOS default settings to ensure system compatibility and stability. Select the Load Optimized Defaults item under the Exit menu or press the <F5> hotkey.
  • Page 33 ASUS CrashFree BIOS 3 The ASUS CrashFree BIOS 3 utility is an auto recovery tool that allows you to restore the BIOS file when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS file using a USB flash drive that contains the BIOS file.
  • Page 34 RAID configurations The motherboard supports RAID configurations. RAID definitions Volume provides the ability to link-together storage from one or several disks, regardless of the size of the space on those disks. This configuration is useful in scavenging space on disks unused by other disks in the array. This configuration does not provide performance benefits or data redundancy, disk failure will result in data loss.
  • Page 35 Appendix General notices FCC Compliance Information Responsible Party: Asus Computer International Address: 48720 Kato Rd., Fremont, CA 94538, USA Phone / Fax No: (510)739-3777 / (510)608-4555 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
  • Page 36 ASUS follows the green design concept to design and manufacture our products, and makes sure that each stage of the product life cycle of ASUS product is in line with global environmental regulations. In addition, ASUS disclose the relevant information based on regulation requirements.
  • Page 37 ASUS products sold in Vietnam, on or after September 23, 2011,meet the requirements of the Vietnam Circular 30/2011/TT-BCT. Các sản phẩm ASUS bán tại Việt Nam, vào ngày 23 tháng 9 năm2011 trở về sau, đều phải đáp ứng các yêu cầu của Thông tư 30/2011/TT-BCT của Việt Nam.
  • Page 38 Notices for Wi-Fi model FCC RF Caution Statement WARNING: Any changes or modifications not expressly approved by the party responsible for compliance could void your authority to operate the equipment. FCC 5.925-7.125 GHz Caution Statement Operation of transmitters in the 5.925-7.125 GHz band is prohibited for control of or communications with unmanned aircraft systems.
  • Page 39 KC: Korea Warning Statement NCC: Wireless Statement 取得審驗證明之低功率射頻器材,非經核准,公司、商號或使用者均不得擅自變更頻 率、加大功率或變更原設計之特性及功能。低功率射頻器材之使用不得影響飛航安全及 干擾合法通信;經發現有干擾現象時,應 立即停用,並改善至無干擾時方得繼續使用。 前述合法通信,指依電信管理法規定作業之無線電通信。低功率射頻器材須忍受合法通 信或工業、科學及醫療用電波輻射性電機設備之干擾。 應避免影響附近雷達系統之操作。 Japan RF Equipment Statement 屋外での使用について 5GHz帯 (W52/53) 及び6GHz帯 (LPI) の屋外での使用は、 電波法により禁じられています (法令に より許可された場合は除く) ( 6GHz帯は対応製品のみ) 。 法律および規制遵守 本製品は電波法及びこれに基づく命令の定めるところに従い使用してください。 日本国外では、 その国の法律または規制により、 本製品の使用ができないことがあります。 このような国では、 本 製品を運用した結果、 罰せられることがありますが、 当社は一切責任を負いかねますのでご了承 ください。...
  • Page 40 ASUSTek Computer Inc. hereby declares that this device is in compliance with the essential requirements and other relevant provisions of The Radio Equipment Regulations 2017 (S.I. 2017/1206). Full text of UKCA declaration of conformity is available at https://www.asus.com/support/. The WiFi operating in the band 5150-5350MHz shall be restricted to indoor use for the country listed below:...
  • Page 41 2014/53/UE. La déclaration de conformité de l’UE peut être téléchargée à соответствует основным требованиям и другим соответствующим partir du site internet suivant : https://www.asus.com/fr/support/. условиям директивы 2014/53/EU. Полный текст декларации соответствия Dans la plage de fréquences 5150-5350 MHz, le WiFi est restreint à une ЕС...
  • Page 42 ASUSTeK Computer Inc. verklaart hierbij dat dit apparaat voldoet aan de zahtjevima i ostalim odgovarajućim odredbama direktive 2014/53/EU. Cijeli essentiële vereisten en andere relevante bepalingen van Richtlijn 2014/53/ tekst EU izjave o sukladnosti dostupan je na https://www.asus.com/support/. EU. De volledige tekst van de EU-conformiteitsverklaring is beschikbaar op https://www.asus.com/support/.
  • Page 43 2014/53/ES būtiskajām prasībām un citiem citiem saistošajiem nosacījumiem. Οδηγίας 2014/53/ΕE. Το πλήρες κείμενο της δήλωσης συμμόρφωσης της ΕΕ Pilns ES atbilstības paziņojuma teksts pieejams šeit: είναι διαθέσιμο στη διεύθυνση https://www.asus.com/support/. https://www.asus.com/support/. Το WiFi που λειτουργεί στη ζώνη 5150-5350MHz περιορίζεται για χρήση σε...
  • Page 44 Direktive 2014/53/EU. Polno besedilo izjave EU o skladnosti je na voljo na https://www.asus.com/support/. Pentru ţările listate în tabelul de mai jos, reţelele WiFi care funcţionează în banda de frecvenţă de 5.150-5.350 MHz trebuie utilizate doar în interior: WiFi, ki deluje v pasovnem območju 5150–5350 MHz, mora biti v državah,...
  • Page 45 вимогам та ншим в дпов дним вимогам Директиви 2014 / 53 / EU. Повний 2014/53/EU. En https://www.asus.com/support/ está disponible el texto текст декларац ї в дпов дност нормам ЄС доступний на...
  • Page 46 ASUS offers a voluntary manufacturer’s Commercial Guarantee. • ASUS tilbyder en valgfri handelsmæssig garanti. • ASUS reserves the right to interpret the provisions of the ASUS • ASUS forbeholder sig retten til at fortolke bestemmelserne i ASUS’ Commercial Guarantee. handelsmæssige garanti.
  • Page 47 Wszelkie informacje na temat gwarancji można znaleźć na stronie https://www.asus.com/ua/support. https://www.asus.com/pl/support. Компан я ASUS не не се в дпов дальност за шкоду, запод яну життю, Informații despre garanția ASUS здоров’ю чи майну користувача або нших ос б внасл док використання...
  • Page 48 ASUS. • Bảo hành thương mại này của ASUS được cung cấp độc lập và ngoài Bảo đảm pháp lý theo luật định và không có cách nào ảnh hưởng đến hoặc giới hạn các quyền theo Bảo lãnh pháp lý. Để biết tất cả các thông tin bảo hành, vui lòng truy cập...
  • Page 49 Address: 1F., No. 15, Lide Rd., Beitou Dist., Taipei City 112 https://qr.asus.com/ProductSafety ASUS COMPUTER INTERNATIONAL (America) Address: 48720 Kato Rd., Fremont, CA 94538, USA ASUS COMPUTER GmbH (Germany and Austria) Address: Harkortstrasse 21-23, 40880 Ratingen, Germany ASUSTeK (UK) LIMITED Address: 1st Floor, Sackville House, 143-149 Fenchurch Street, London, EC3M 6BL, England, United Kingdom ASUS GLOBAL PTE.
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