General Information for Asus Motherboards
ASUS PRIME B850M-A-CSM, AMD, Socket AM5, AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series, Socket AM5, DDR5-SDRAM, 256 GB
PRIME B850M-A-CSM
ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processors.
The PRIME B850M-A-CSM motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It’s designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.
- AMD B850 (AM5 Socket) micro-ATX motherboard
- Advanced AI PC-ready
- DDR5
- PCIe 5.0 Ready
- Three M.2 slots
- Realtek 2.5Gb Ethernet
- Dual DisplayPort
- HDMI
- Front USB 5Gbps Type-C support
- BIOS FlashBack
- Aura Sync
ASUS Corporate Stable Model
ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software.
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ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs.
- Optimize IT endpoint management - Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely.
- Automate IT maintenance - Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility.
- Securely manage all of endpoints - Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices.
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Performance
- AI Advisor - ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.
- Digital Power Design - PRIME B850M-A-CSM features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use.
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Six-layer PCB design - The multi-layered printed circuit board design quickly dissipates heat around the voltage regulators to improve overall system stability and provide the CPU with more overclocking headroom.
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Digi+ VRM control - The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.
Enhanced Memory & Storage Performance
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Enhanced DDR5 performance - Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B850M-A-CSM maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits. For entry-level modules without EXPO™ support, ASUS Enhanced Memory Profile (AEMP) automatically detects memory chips and provides optimized profiles for enhanced performance. For those looking to surpass stock DDR5 speeds, the PRIME B850M-A-CSM offers extensive AMD Extended Profiles for Overclocking (EXPO™) support and a wide array of UEFI settings for further performance tweaks.
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Three M.2 slots (up to 128 Gbps) - PRIME B850M-A-CSM offers a total of three M.2 slots, including one that supports data-transfer speeds of up to 128 Gbps via PCIe 5.0, and two that support PCIe 4.0. This enables quicker boot-up and app load times with OS or application drives.
Cooler by design
The PRIME B850M-A-CSM motherboard is engineered with multiple onboard heatsinks and an array of hybrid fan headers to help ensure your rig stays cool and stable under intense workloads.
- ASUS Fan Xpert 2+ - ASUS Fan Xpert 2+ software provides comprehensive control over fans. An Auto-Tuning mode intelligently configures all parameters with a single click. There’s also an Extreme Quiet mode that reduces chassis fan speeds to below the default minimum to keep your system whisper-quiet when performing light tasks. Fans can also be controlled via the UEFI BIOS.
Empowering connections
This motherboard offers a versatile range of connectivity, including support for PCIe 5.0 slot and an arsenal of USB ports which includes Type-C® connections.
Personalization
The PRIME B850M-A-CSM enhances the user experience across the board, from simplifying BIOS setting adjustments to offering customizable RGB lighting controls for a uniquely personal system aesthetic.
- UEFI BIOS - The UEFI interface delivers easy-to-use configuration options for PC beginners, and advanced features for veterans.
- ASUS DriverHub - Simplify driver management with automatic detection, one-click installation and update for smooth, efficient system performance.
- Armoury Crate - Customize Aura Sync RGB and control ASUS devices. Includes product registration and updates.
- Aura Sync - Complete RGB lighting control for enthusiast systems, ensuring seamless synchronization with compatible hardware.
- Addressable Gen2 RGB headers - Three addressable Gen 2 headers detect LED counts on compatible RGB devices, automatically adjusting lighting effects accordingly.
DIY friendly
The PRIME B850M-A-CSM motherboard features EZ PC DIY innovations that simplify and speed up the PC building process, making DIY easy and convenient.
- BIOS FlashBack - BIOS FlashBack™ simplifies BIOS updates. Just load the BIOS file onto a FAT32 USB stick, insert it into the BIOS FlashBack™ port, and press a button—no CPU or memory needed.
- SafeSlot - PCIe 5.0 is twice as fast as PCIe 4.0. ASUS has adapted our SMT manufacturing for the faster SafeSlot, a reinforced metal sheath that ensures secure card installation and faster data speeds.
- Q-LED Core - The Q-LED Core display produces color-coded lights during the Power-On Self-Test (POST) that can help you troubleshoot potential issues.
PRIME B850M-A-CSM
Further details for this product, PRIME B850M-A-CSM, can be found at the manufacturer website. Please note, these web addresse(s) are supplied by 3rd parties, Quzo UK is not responsible for the content.
PRIME B850M-A-CSM motherboard socket AMD AM5 (microATX, DDR5, PCIe 5.0, 3x M.2 slots, Realtek 2.5Gb Ethernet, DisplayPort, HDMI, BIOS FlashBack, Aura Sync, ASUS Control Center Express)
ASUS PRIME B850M-A-CSM. Processor manufacturer: AMD, Processor socket: Socket AM5, Compatible processor series: AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. Supported memory types: DDR5-SDRAM, Maximum internal memory: 256 GB, Memory slots type: DIMM. Supported storage drive interfaces: PCI Express 4.0, PCI Express 5.0, Supported storage drive types: HDD & SSD, RAID levels: 0, 1, 5, 10. Maximum resolution: 7680 x 4320 pixels. Ethernet interface type: 2.5 Gigabit Ethernet
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ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX 90MB1LQ0-M0EAYC Specifications
Product Type
Motherboards
Brand
ASUS
Collection Model Asus PRIME B850M-A-CSM
Manufacturer Product Type
Asus Motherboards
Manufacturer Product Type
AMD Motherboards
Product colour
Grey
Cooling type Passive
Product colour Multicoloured
Product Family PRIME B850M-A-CSM
Processor socket
Socket AM5
Processor manufacturer
AMD
Maximum Resolution 7680 x 4320 Pixels
Motherboard chipset AMD B850
Parallel processing technology support Not supported
Supported memory types DDR5-SDRAM
Number of memory slots 4
Maximum internal memory 256 GB
Memory slots type DIMM
ECC ompatibility ECC & Non-ECC
Supported memory clock speed (max) 8000 MHz
Unbuffered memory Yes
Maximum internal memory per slot 64 GB
Number of storage drives supported 7
RAID support Yes
Supported storage drive types HDD & SSD
Supported storage drive interfaces PCI Express 4.0, PCI Express 5.0
RAID levels 0, 1, 5, 10
Number of HDDs supported 4
Ethernet LAN Yes
Ethernet interface type 2.5 Gigabit Ethernet
Wi-Fi No
HDMI ports quantity 1
Ethernet LAN (RJ-45) ports 1
DisplayPorts quantity 2
DVI-D ports quantity 0
HDMI version 2.1
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity 0
USB 2.0 ports quantity 4
Number of SATA III connectors 4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity 2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity 2
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity 0
Line-in Yes
Microphone in Yes
Headphone outputs 1
DisplayPort version 1.4
VGA (D-Sub) ports quantity 0
PCI Express x16 (Gen 4.x) slots 2
PCI Express x16 (Gen 5.x) slots 1
Number of M.2 (M) slots 3
1st M.2 largest key size 2280
1st M.2 highest PCI Express generation 5.0
2nd M.2 largest key size 2280
2nd M.2 highest PCI Express generation 4.0
3rd M.2 largest key size 2280
3rd M.2 highest PCI Express generation 4.0
4th M.2 largest key size 2280
4th M.2 highest PCI Express generation 4.0
Power source type ATX
Windows operating systems supported Windows 10 x64, Windows 11
Width 244 mm
Depth 244 mm
USB 2.0 connectors 2
USB 3.2 Gen 1 (3.1 Gen 1) connectors 2
USB 3.2 Gen 2 (3.1 Gen 2) connectors 0
S/PDIF out connector Yes
Front panel audio connector Yes
Front panel connector Yes
ATX Power connector (24-pin) Yes
CPU fan connector Yes
Number of chassis fan connectors 3
Number of CPU fan connectors 1
Chassis intrusion connector Yes
Peripheral (Molex) power connectors (4-pin) 1
EPS power connector (8-pin) Yes
Number of EPS power connectors (8-pin) 1
Number of COM connectors 1
12V power connector Yes
TPM connector Yes
RGB LED pin header Yes
Number of RGB LED pin headers 3
Compatible processor series AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets Socket AM5
Audio output channels 7.1 channels
BIOS type UEFI AMI
BIOS memory size 256 Mbit
Component for PC
Motherboard chipset family AMD
Memory channels Dual-channel
Features RGB Lighting
Package width 275 mm
Package depth 275 mm
Package weight 1.45 kg
Package height 67.5 mm
Screws included Yes
Motherboard form factor Micro ATX
MPN 90MB1LQ0-M0EAYC
Video Inputs DisplayPort
ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX 90MB1LQ0-M0EAYC Reviews
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