SKU: 47493228962

Asus PRIME B840M-A-CSM AM5 Micro ATX Motherboard

$1146.91 $1274.35
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Description

Asus PRIME B840M-A-CSM AM5 Micro ATX MotherboardQuick Specs Supports AMD Ryzen 7000 8000 9000 Series Desktop Processors. Features a PCIe 4. 0 slot for lightning fast gaming experiences. Includes SafeSlot Core+ for enhanced PCIe slot retention and durability. Simplifies builds with Q LED Core for easy troubleshooting. Offers BIOS FlashBack for convenient BIOS updates. Built for AMD Ryzen Processors Designed to fully support the latest AMD Ryzen 7000, 8000 and 9000 Series desktop processors, the ASUS

Quick Specs

  • Supports AMD Ryzen 7000/8000/9000 Series Desktop Processors.
  • Features a PCIe 4.0 slot for lightning-fast gaming experiences.
  • Includes SafeSlot Core+ for enhanced PCIe slot retention and durability.
  • Simplifies builds with Q-LED Core for easy troubleshooting.
  • Offers BIOS FlashBack for convenient BIOS updates.

Built for AMD Ryzen Processors

Designed to fully support the latest AMD Ryzen 7000, 8000 and 9000 Series desktop processors, the ASUS B840M AM5 Motherboard is ready to deliver exceptional computing power. Ideal for gamers, content creators, and anyone seeking a high-performance PC, it ensures seamless compatibility and optimised performance with your chosen Ryzen CPU.

Experience Lightning-Fast Gaming with this ASUS AM5 Motherboard

The PCIe 4.0 slot provides double the bandwidth compared to the previous generation, unlocking lightning-fast speeds for modern GPUs and NVMe SSDs. Gamers will appreciate reduced loading times and smoother gameplay, while creative professionals can benefit from quicker data transfers for large files and complex projects. This AM5 Micro ATX Motherboard is built to handle it all.

EZ PC DIY Features

Building or upgrading your PC is now easier than ever with ASUS's innovative DIY-friendly features. SafeSlot Core+ provides stronger PCIe slot retention and greater shearing resistance, ensuring your graphics card stays securely in place. Q-LED Core simplifies troubleshooting by indicating potential issues with key components, while the pre-mounted I/O shield streamlines installation and protects against electrostatic discharge.

Stay Cool and Reliable

Effective thermal management is essential for maintaining peak performance, and this ASUS AM5 Motherboard is equipped with comprehensive cooling solutions. Multiple heatsinks and strategically placed fan headers keep temperatures in check, preventing thermal throttling and ensuring long-term reliability, even under heavy workloads.

Future-Proof Connectivity

With a range of USB ports, including USB Type-C, this B840M AM5 Micro ATX Motherboard offers versatile connectivity options for all your peripherals and devices. Fast Ethernet ensures reliable network performance for online gaming and seamless streaming, while high-definition audio delivers immersive sound quality for an enhanced entertainment experience.

FEATURES:

  • Intel B840M Chipset
  • Supports AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors
  • Supports DDR5 Memory, Dual Channel DDR5 7600+ MT/s (OC) 256GB max capacity
  • Ultra-fast Realtek 2.5G Ethernet LAN
  • Lightning Fast Game experience: PCIe 4.0 slot support
  • Asus Fan Xpert 2+ for more cooling control
  • EZ PC DIY: SafeSlot Core+ and Q-LED Core, BIOS Flashback, and a pre-mounted I/O shield for easy usage
  • Aura Sync support for full RGB lighting control

SPECIFICATIONS:

  • CPU:
    • 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
  • Memory:
    • 4 x DIMM slots, max. 256GB, DDR5
    • Supports up to 7600+MT/s (OC) with Ryzen 9000 & 8000 & 7000 Series Processors, ECC and Non-ECC, Un-buffered DIMM*
    • Dual channel memory architecture
    • Supports AMD Extended Profiles for Overclocking (EXPO)
    • ASUS Enhanced Memory Profile (AEMP)
    • * Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration
    • * Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
  • Graphics:
    • 2 x DisplayPort**
    • 1 x HDMI port***
    • * Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
    • ** Supports max. 8K@30Hz as specified in DisplayPort 1.4.
    • *** Supports 4K@60Hz as specified in HDMI 2.1.
  • Expansion Slots:
    • AMD Ryzen 9000 & 7000 Series Desktop Processors*
    • 1 x PCIe 4.0 x16 slot (supports x16 mode)
    • AMD Ryzen 8000 Series Desktop Processors
    • 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)**
    • AMD B840 Chipset
    • 2 x PCIe 3.0 x16 slots (support x1 mode)
    • * Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
    • ** Specifications vary by CPU types.
    • To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/ for the list of supported peripherals.
  • Storage:
    • Total supports 3 x M.2 slots and 4 x SATA 6Gb/s ports
    • 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 2242/2260/2280 (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 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)*
    • AMD B840 Chipset
    • M.2_3 slot (Key M), type 2280 (supports PCIe 3.0 x4 mode)
    • 4 x SATA 6Gb/s ports
    • * Specifications vary by CPU types.
  • RAID:
    • AMD RAIDXpert2 Technology
    • Ryzen 9000 Series Processors: RAID 0/1/5/10
    • Ryzen 8000 Series Processors: RAID 0/1
    • Ryzen 7000 Series Processors: RAID 0/1/10
  • Ethernet:
    • 1 x Realtek 2.5Gb Ethernet
    • ASUS LANGuard
  • Rear USB (Total 7 ports):
    • 2 x USB 10Gbps ports (2 x Type-A)
    • 1 x USB 5Gbps port (1 x USB Type-C)
    • 4 x USB 2.0 ports (4 x Type-A)
  • Front USB (Total 7 ports)
    • 1 x USB 5Gbps connector (supports USB Type-C)
    • 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
    • 2 x USB 2.0 headers support 4 additional USB 2.0 ports
    • * USB Type-C power delivery output: max. 5V/3A
  • Audio:
    • Realtek 7.1 Surround Sound High Definition Audio CODEC*
    • Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
    • Supports up to 24-Bit/192 kHz playback
  • Audio Features:
    • Audio Shielding
    • Premium audio capacitors
    • Dedicated audio PCB layers
    • *A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
  • Back Panel I/O Ports:
    • 2 x USB 10Gbps ports (2 x Type-A)
    • 1 x USB 5Gbps port (1 x USB Type-C)
    • 4 x USB 2.0 ports (4 x Type-A)
    • 2 x DisplayPort
    • 1 x HDMI port
    • 1 x Realtek 2.5Gb Ethernet port
    • 3 x Audio jacks
    • 1 x BIOS FlashBack button
  • Operating System: Windows 11, Windows 10 64-bit
  • Form Factor: Micro ATX

WHAT'S IN THE BOX:

  • Asus PRIME B840M-A-CSM AM5 Micro ATX Motherboard - Black x1
  • SATA Cables x2
  • M.2 rubber package x1
  • Screw Package for M.2 SSD x2
  • Quick Start Guide x1

Why Asus?

ASUS is a globally recognised tech company renowned for quality and innovation. For over three decades, ASUS has consistently delivered cutting-edge PC components and electronics, earning the trust of gamers, professionals, and everyday users alike. Choose ASUS for reliability, performance, and a commitment to pushing the boundaries of what's possible. When building your next PC, an ASUS AM5 motherboard is a solid foundation.



Dimensions (LxWxH): 28.0 x 28.0 x 7.0 cm
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47493228962

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4.1 ★★★★★
Based on 1041 reviews
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Product Reviews
P
Verified Purchase
Pat Smith
Chelsea, US
★★★★★ 5
Excellent quality, excellent privacy.
Color: White, Size: 4 Panel
I love this room divider! Was easy to put together. It's easy to move around. I also bought the eight panel. I move it and change it around all the time. Good color good material good privacy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
S
Verified Purchase
Skylar Hartnett
Waukegan, US
★★★★★ 5
It works to divide a room, but it's not easy to use.
Color: Grey, Size: 6 Panel
This comes in multiple pieces and you have to build every single piece including the cloth that is between the two poles. There are plastic clips to hold the sections together, but they easily come off if you move the dividers the wrong way or try to reposition it. The only thing holding it up is rectangular shaped feet on the bottom and they are a pain when you hit it with your toes. It works if you need to divide a room, but its not pretty and there are far better options. It's cheaply made and has a habit of falling down if you are trying to use it in a straight or slightly angled line.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2022
A
Verified Purchase
Amazon Customer swengelp
Cuba, US
★★★★★ 4
Nice divider
Color: Black, Size: 6 Panel
Nice divider. Set up is a bear. I am a bit concerned with stability. Overall I like it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
N
Verified Purchase
Nay from the Bay
Lake Worth, US
★★★★★ 5
Great privacy room divider
Color: Black, Size: 6 Panel, Color: Black, Size: 6 Panel
I got this room divider for our game room that shares the garage/laundry room, to separate the spaces. I was happy that it was relatively easy to put together in less than an hour with nothing more than a screwdriver (provided) although I used a small handheld drill. The instructions were pretty straightforward and easy to understand as everything was labeled. I have 2 small grandkids at home running around while I put this together so my timeline to completion might be longer than others. It recommends 2 people to assemble, but I was able to complete alone in about 40 minutes total and as I said I used a small handheld drill, (although it does come with a small Philips screwdriver) which is the only tool you need for assembly. The first two panels took me about 20 minutes but the other 4 were simple repeats after the initial 2. After all 6 panels were assembled the plastic clips to piece them together were literally a "SNAP" to put on. The poles are made of metal and the panels are made of a very sturdy almost canvas like fabric. When held up to the light not a lot shined through so very good for privacy. You can snap them together in sections and have 2 separate panels of 3 or what ever configuration you want. They are easy to move and bend around furniture or other obstacles, also fold flat together if you need to put them aside for storage. This worked out just as we had planned, very easy to move around when needed and I am very happy with this product. I loved how simple it was to put together, easy instructions, and the durability and functionality of it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2024
R
Verified Purchase
robert ferrell
Dallas, US
★★★★★ 5
Good
Color: Black, Size: 6 Panel
Love it , just what so needed , easy to put together (some what ) …
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026

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