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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4.8 ★★★★★
Based on 1972 reviews
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Product Reviews
J
Verified Purchase
JB
Charlottesville, US
★★★★★ 2
No challenge for a M/L dog
Color: Pink
Too easy for my 30 pound shepherd. The puzzle moves around easily. It’s fun for him but he goes through it quick, not enough working through it time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
K
Verified Purchase
Katrina
Lake Worth, US
★★★★★ 3
My cats are too lazy for this
Color: Pink
I bought this in hopes that my cats would find it entertaining, as they've never had to work for treats before, they unanimously decided to simply meow and look cute. THATS all it takes and poof! They get a treat.. (It gets me every time). It is an interesting well made item and seems sturdy and intriguing, my cats are just spoiled Lil stinkers who don't want to "struggle" to get a treat...lol
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
S
Verified Purchase
Stephanie K.
Charlottesville, US
★★★★★ 5
Perfect puppy starter kit and gift! Perfect for plane rides and kennel!
Color: Neutral, Color: Neutral
Perfect puppy gift! We use the kennel as her safe haven, and for potty training . This heartbeat tool is amazing and helped our puppy get acclimated to her kennel. She goes into her kennel and sleeps with it on her own. It calmed her down on the plane completely. We had a 6-hour flight and she did fine with the heartbeat toy. At home innthe kennel, the whining was very very minimal the first couple days, then it stopped. As you would hear and see her snuggle up and fall asleep. I think it is a bit pricy, but not too bad for the benefit. The heartbeat is seperate and is putninside a pouch on the stuffed animal. The blanket is soft, beautiful and perfect size. Good quality fabric. Both chew toys were loved by her.I do notice my large breed puppy prefers the rope and small tennis ball type chew toys. However, she plays with these too. Haven't used the heating packs yet, they go inside the pouch with the heartbeat item. I am sure we will because my puppy does love to be in front of my small heater under my desk to keep my feet warm. The packaging was extremely nice and fancy and was complimentary to the items inside.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2021
N
Verified Purchase
norra.theexplorer
Waukegan, US
★★★★★ 5
Best Idea for Puppy's First Day Home
Color: Pink
I was a bit reserved on purchasing this kit because it was a bit expensive. After a month now with my pup at home, this was the best investment for us and our GSD. On the first night, we used the heart beating snuggle puppy and blanket. She slept the entire night without an accident or a cry. The heartbeat in the snuggle puppy and the heat pad was the best idea. Our puppy never felt alone (just fyi, her crate was in the room with us for the 2 weeks). A month later, she is so protective of her snuggle puppy. We only used 1 heat pack to soothe her during the first week. The heat packs last a while. Our GSD now uses the snuggle puppy as a pillow or an object to be close to while she is in her crate. Any new puppy owner could definitely benefit from using this. Of course, with all things puppy, it does require a bit of time to correlate toys as a positive thing. We exclusively keep the snuggle puppy in her crate and make it a part of her secure place. My GSD puppy did really care for the teething heart toy. Even after freezing it, she didn't care for it. She also outgrew the small toy. She will chew it from time to time but it doesn't entertain her much. I found the kit, overall, very helpful with our puppy's adjustment to our home. She sleeps through the night since 8 weeks old and now at 12 weeks old. We've never had an accident in her crate overnight with the help with the snuggle puppy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2020
D
Verified Purchase
3 Dog Mom
Battle Creek, US
★★★★★ 5
Amazing kit for your puppy
Color: Blue
We’ve had 6 puppies over the years, and this is the first time we’ve had this wonderful little kit to welcome our little one home. We had the blanket with his litter so it smelled like them when he came home. He he loves that blanket, he loves the dog with the little heartbeat, and the teething toys. The 5 star review is because everything in this kit is so well made, really wonderful quality, and a great value. The blanket is a very nice thick plush, not some cheap one. The stuffed dog is big and fluffy and well made, the heartbeat works wonderfully, and the little chew toys safe and well made.i would encourage anyone who’s bringing home. A little one please get this first. It’s going to make your pup more comfortable when they get home, and will help then sleep better during the night and their naps. Very Well Done !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 20, 2021

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