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The ASUS PRIME B840M-A WIFI is a micro ATX motherboard built around the AMD B840 chipset and Socket AM5 platform. It supports compatible AMD Ryzen 7000, 8000 and 9000 Series processors, providing a platform for systems based on current AM5 Ryzen CPUs. The board supports one processor and combines DDR5 memory, PCIe expansion, M.2 and SATA storage connectivity, integrated networking, wireless connectivity, onboard audio and a comprehensive selection of external and internal interfaces.
Four 288-pin DIMM slots provide support for up to 192GB of DDR5 memory. The board uses a dual-channel memory architecture and supports unbuffered memory with non-ECC, on-die ECC and ECC integrity options. Memory speeds of up to 3800MHz when overclocked are supported, while AMD EXPO technology and the ASUS Enhanced Memory Profile, or AEMP, are included among the motherboard's memory features. ASUS OptiMem II is also incorporated into the board's hardware feature set.
Expansion is provided through one PCIe 4.0 x16 slot and two PCIe 3.0 x1 slots. Storage expansion includes three M.2 sockets, comprising one socket that accepts 2242, 2260 and 2280 M.2 Key M devices and two additional sockets for 2280 M.2 Key M devices. The motherboard also provides four SATA-600 connections using 7-pin Serial ATA connectors. RAID 0, RAID 1 and RAID 10 are supported on the SATA-600 storage interfaces, while two of the PCIe 4.0 M.2 connections also support RAID 0, RAID 1 and RAID 10. The third PCIe 4.0 M.2 connection provides an additional M.2 storage interface.
A broad range of external connections is available for displays, peripherals, networking and audio equipment. Display connectivity consists of one HDMI interface and two DisplayPort connections, with onboard graphics functionality requiring a suitable CPU. USB connectivity includes two USB 3.2 Gen 2 ports, four USB 2.0 ports and one USB-C 3.1 Gen 1 connection. Additional USB connectivity is available through internal headers, including USB-C 3.2 Gen 1, USB 3.2 Gen 1 and USB 2.0. The main specification identifies the USB configuration as one USB-C 3.2 Gen 1, two USB 3.2 Gen 2 and four USB 2.0 connections, together with one USB-C 3.2 Gen 1, one USB 3.2 Gen 1 and two USB 2.0 connections available through headers.
Other external interfaces include a PS/2 keyboard and mouse connection as well as dedicated mini-jack connections for microphone input, audio line-in and audio line-out. Internally, the board provides headers for serial connectivity, audio, SPDIF output, a speaker and SPI in addition to its USB headers. Power is supplied to the motherboard through a 24-pin main power connector and an 8-pin ATX12V connector.
Networking options include 2.5 Gigabit Ethernet alongside Wi-Fi 6E wireless networking supporting the 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac and 802.11ax standards. Bluetooth 5.3 is also integrated, allowing compatible Bluetooth devices to connect without requiring a separate Bluetooth adapter. An ASUS Wi-Fi Q-antenna is supplied with the motherboard for its wireless connectivity.
The PRIME B840M-A WIFI incorporates High Definition Audio with 8-channel output. This provides the motherboard's integrated audio functionality for gaming, entertainment and general system use while complying with the High Definition Audio standard.
ASUS has equipped the board with a selection of firmware, management, protection and installation features. It uses an AMI BIOS with UEFI BIOS functionality and includes ASUS EZ Flash 3 and ASUS UEFI BIOS EZ Mode. CrashFree BIOS 3 is included alongside a BIOS FlashBack button and BIOS FlashBack LED. Wake functionality includes Wake on LAN and wake on PME, while Preboot eXecution Environment support provides PXE functionality.
The motherboard's additional hardware features include ASUS EZ DIY, ASUS DIGI+ VRM, ASUS 5X Protection III, LANGuard, overvoltage protection, ASUS SafeSlot Core and ASUS Stainless Steel Back I/O. ASUS Q-Design features include Q-DIMM, Q-LED Core and Q-Slot. Thermal management includes a VRM heatsink design, helping provide cooling around the motherboard's voltage regulation area during system operation.
ASUS Aura Sync and Lighting Control are supported for compatible lighting configurations. The board also includes ASUS Control Center Express, also identified as ACC Express, and uses a 6-layer PCB construction. These features are complemented by ASUS OptiMem II and ASUS Enhanced Memory Profile support as part of the motherboard's memory and system feature set.
The micro ATX board measures 24.4cm wide by 24.4cm deep. Its compact format combines the AM5 processor platform with four DDR5 DIMM slots, PCIe expansion, three M.2 storage sockets, four SATA-600 connections, wired 2.5 Gigabit Ethernet, Wi-Fi 6E, Bluetooth 5.3 and integrated 8-channel HD Audio in a single motherboard.
The package contains the ASUS PRIME B840M-A WIFI motherboard together with two Serial ATA cables, an I/O shield, an M.2 screw package and an ASUS Wi-Fi Q-antenna. Included software consists of ASUS CPU-Z, PC Cleaner, ASUS TurboV EVO Utility, ASUS AI Suite III, ASUS Fan Xpert 2+, ASUS AURA Creator and Armoury Crate. Norton 360 for Gamers is supplied as a 60-day trial, Adobe Creative Cloud is supplied as a free trial, and WinRAR is listed among the included software, including a 40-day trial.
SureLookIT.com
The ASUS PRIME B840M-A WIFI is a micro ATX motherboard built around the AMD B840 chipset and Socket AM5 platform. It supports compatible AMD Ryzen 7000, 8000 and 9000 Series processors, providing a platform for systems based on current AM5 Ryzen CPUs. The board supports one processor and combines DDR5 memory, PCIe expansion, M.2 and SATA storage connectivity, integrated networking, wireless connectivity, onboard audio and a comprehensive selection of external and internal interfaces.
Four 288-pin DIMM slots provide support for up to 192GB of DDR5 memory. The board uses a dual-channel memory architecture and supports unbuffered memory with non-ECC, on-die ECC and ECC integrity options. Memory speeds of up to 3800MHz when overclocked are supported, while AMD EXPO technology and the ASUS Enhanced Memory Profile, or AEMP, are included among the motherboard's memory features. ASUS OptiMem II is also incorporated into the board's hardware feature set.
Expansion is provided through one PCIe 4.0 x16 slot and two PCIe 3.0 x1 slots. Storage expansion includes three M.2 sockets, comprising one socket that accepts 2242, 2260 and 2280 M.2 Key M devices and two additional sockets for 2280 M.2 Key M devices. The motherboard also provides four SATA-600 connections using 7-pin Serial ATA connectors. RAID 0, RAID 1 and RAID 10 are supported on the SATA-600 storage interfaces, while two of the PCIe 4.0 M.2 connections also support RAID 0, RAID 1 and RAID 10. The third PCIe 4.0 M.2 connection provides an additional M.2 storage interface.
A broad range of external connections is available for displays, peripherals, networking and audio equipment. Display connectivity consists of one HDMI interface and two DisplayPort connections, with onboard graphics functionality requiring a suitable CPU. USB connectivity includes two USB 3.2 Gen 2 ports, four USB 2.0 ports and one USB-C 3.1 Gen 1 connection. Additional USB connectivity is available through internal headers, including USB-C 3.2 Gen 1, USB 3.2 Gen 1 and USB 2.0. The main specification identifies the USB configuration as one USB-C 3.2 Gen 1, two USB 3.2 Gen 2 and four USB 2.0 connections, together with one USB-C 3.2 Gen 1, one USB 3.2 Gen 1 and two USB 2.0 connections available through headers.
Other external interfaces include a PS/2 keyboard and mouse connection as well as dedicated mini-jack connections for microphone input, audio line-in and audio line-out. Internally, the board provides headers for serial connectivity, audio, SPDIF output, a speaker and SPI in addition to its USB headers. Power is supplied to the motherboard through a 24-pin main power connector and an 8-pin ATX12V connector.
Networking options include 2.5 Gigabit Ethernet alongside Wi-Fi 6E wireless networking supporting the 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac and 802.11ax standards. Bluetooth 5.3 is also integrated, allowing compatible Bluetooth devices to connect without requiring a separate Bluetooth adapter. An ASUS Wi-Fi Q-antenna is supplied with the motherboard for its wireless connectivity.
The PRIME B840M-A WIFI incorporates High Definition Audio with 8-channel output. This provides the motherboard's integrated audio functionality for gaming, entertainment and general system use while complying with the High Definition Audio standard.
ASUS has equipped the board with a selection of firmware, management, protection and installation features. It uses an AMI BIOS with UEFI BIOS functionality and includes ASUS EZ Flash 3 and ASUS UEFI BIOS EZ Mode. CrashFree BIOS 3 is included alongside a BIOS FlashBack button and BIOS FlashBack LED. Wake functionality includes Wake on LAN and wake on PME, while Preboot eXecution Environment support provides PXE functionality.
The motherboard's additional hardware features include ASUS EZ DIY, ASUS DIGI+ VRM, ASUS 5X Protection III, LANGuard, overvoltage protection, ASUS SafeSlot Core and ASUS Stainless Steel Back I/O. ASUS Q-Design features include Q-DIMM, Q-LED Core and Q-Slot. Thermal management includes a VRM heatsink design, helping provide cooling around the motherboard's voltage regulation area during system operation.
ASUS Aura Sync and Lighting Control are supported for compatible lighting configurations. The board also includes ASUS Control Center Express, also identified as ACC Express, and uses a 6-layer PCB construction. These features are complemented by ASUS OptiMem II and ASUS Enhanced Memory Profile support as part of the motherboard's memory and system feature set.
The micro ATX board measures 24.4cm wide by 24.4cm deep. Its compact format combines the AM5 processor platform with four DDR5 DIMM slots, PCIe expansion, three M.2 storage sockets, four SATA-600 connections, wired 2.5 Gigabit Ethernet, Wi-Fi 6E, Bluetooth 5.3 and integrated 8-channel HD Audio in a single motherboard.
The package contains the ASUS PRIME B840M-A WIFI motherboard together with two Serial ATA cables, an I/O shield, an M.2 screw package and an ASUS Wi-Fi Q-antenna. Included software consists of ASUS CPU-Z, PC Cleaner, ASUS TurboV EVO Utility, ASUS AI Suite III, ASUS Fan Xpert 2+, ASUS AURA Creator and Armoury Crate. Norton 360 for Gamers is supplied as a 60-day trial, Adobe Creative Cloud is supplied as a free trial, and WinRAR is listed among the included software, including a 40-day trial.
SureLookIT.com
UK Delivery Information
We deliver throughout the UK using trusted national courier networks, with every order handled securely from dispatch to delivery.
UK Delivery Details
£6.99 — 1 to 3 working days
Fully tracked, fully insured, and signature required on delivery for added protection.
All parcels are sent using secure, monitored delivery services. Tracking details are provided so you can follow your order at every stage, and a signature is required at the delivery address to ensure your item is received safely by the correct person. Insurance cover is included from dispatch through to successful delivery, giving extra peace of mind when purchasing higher-value electronics.
Delivery days and exclusions
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We will never ask for personal information (such as passwords or payment details) in an email, phone call or message. We do not take payments over the phone. If you receive such a request, please do not respond to it. If you have any questions regarding a message or email you received, call our Support team, contact details below.
Call us by phone
UK: 01902 214077
+44 (0) 1902 214077
Support Hrs: 10am to 3pm, Monday-Friday. Excluding bank holidays and company holidays.
We are UK VAT registered. Orders are dispatched from our distribution centre in Lutterworth, UK. A tracking number is provided and a signature is required on delivery. We deliver throughout the UK. Tracked and Insured, signature required delivery.
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Manufacturer Warranty Information
All products sold on our website are brand new and supplied through authorised UK distributors. Each item is covered by the manufacturer’s warranty, with the length and terms set by the brand (for example Apple, ASUS, Dell, Lenovo and others). The specific warranty period is shown on the individual product page.
After delivery, customers should register their product on the manufacturer’s website to activate and manage their warranty. In the event of a fault, support, diagnosis and repair are handled directly by the manufacturer through their official service centres, as they are best placed to provide technical assistance, parts and replacements under their warranty terms.
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