Asus PRIME B850M-A-CSM (90MB1LQ0-M0EAYC)

Name: Asus PRIME B850M-A-CSM 90MB1LQ0-M0EAYC
Brand: Asus

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Asus PRIME B850M-A-CSM

2025 Prime-CSM (business)M.2 cooling no backlight 2.5 Gbps

Towards:home / office

Form Factor:micro-ATX

Socket:AM5

Chipset:AMD B850

BIOS:Ami

RAM slots:DDR5 4 sl

RAM form factor:DIMM

RAM clock:8000 MHz

Sound (channels):7.1

Connectors:HDMI, M.2

Additional connectors:DisplayPort

Power connector:24-pin

Processor power:8+4-pin

CSM - a model for corporate users. Buyers of CSM products receive software for the administration of ASUS Control Center.

All specifications

Specifications PRIME B850M-A-CSM

Main
Features	for home/office
Socket	AM5
Form factor	micro-ATX
Power phases	11 / 8+2+1 /
Printed circuit board	6-layer
VRM heatsink
Size (HxW)	244x244 mm


Chipset
Chipset	AMD B850
BIOS	Ami
UEFI BIOS


RAM
DDR5	4 slot(s)
Memory module	DIMM
Operation mode	2 channel
Max. clock frequency	8000 MHz
Max. memory	256 GB
EXPO support


Drive interface
SATA 3 (6Gbps)	4
M.2 connector	3
M.2	3xPCIe 4x
M.2 version	1x5.0, 2x4.0
M.2 SSD cooling
Integrated RAID controller


Expansion slots
PCIe 16x slots	2 pcs
PCIe support	5.0
Steel PCIe connectors

Internal connections
TPM connector
USB-A 2.0	2 pcs
USB-A 5Gbps	1 pcs
USB-C 5Gbps	1 pcs
ARGB LED strip	3


Video outputs
HDMI output
HDMI version	v2.1
DisplayPort	/ x2 /
DisplayPort version	v.1.4


Integrated audio
Audiochip	Realtek
Sound (channels)	7.1


Network interfaces
LAN (RJ-45)	2.5 Gbps
LAN ports	1
LAN controller	Realtek


External connections
USB-A 2.0	4 pcs
USB-A 5Gbps	2 pcs
USB-A 10Gbps	2 pcs
BIOS FlashBack


Power connectors
Main power socket	24-pin
CPU power	8+4-pin
Fan power connectors	6
CPU Fan 4-pin	2
CPU/Water Pump Fan 4-pin	1
Chassis/Water Pump Fan 4-pin	3


Official Website	asus.com
Added to E-Catalog	July 2025
P/N	90MB1LQ0-M0EAYC

E-Catalog UK editor, Motherboards

Valerii Lenko, edited 16.07.2025

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
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	ASUS PRIME B850M-A-CSM Micro-ATX AMD Socket AM5 Motherboard 90MB1LQ0-M0EAYC ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen™ 9000 series processor... mores. The PRIME B850M-A-CSM motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. Its designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications. 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. ASUS Control Center Express 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. Performance AI Solutions ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance. AI Advisor ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way. Performance 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. 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. The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings. Enhanced Memory & Storage Performance 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.2 For entry-level modules without EXPO™ support, ASUS Box.co.uk Delivery: to United Kingdom Report	£116.99 Buy in shop

	ASUS PRIME B850M-A-CSM AM5 DDR5 PCIe 5.0 mATX Motherboard Scan.co.uk Delivery: to United Kingdom Report	£116.99 Buy in shop

	Asus 90MB1LQ0-M0EAYC The ASUS PRIME B850M-A-CSM is based on the AMD B850 chipset and is compatible with AMD processors for the AM5 socket. It has... morefour DDR5 slots for up to 256 GB of RAM. The ASUS PRIME B850M-A-CSM also has one PCIe 5.0 x16 slot and one PCIe 4.0 x16 slot (x4 lanes). In addition, the ASUS PRIME B850M-A-CSM features 8-channel sound, a 2.5 Gigabit LAN interface, four SATA3 ports, three M.2 ports, and a range of USB ports.Specifications:- Processor: Supported Models: Ryzen 5 7xxx (Raphael), Ryzen 5 7xxxX (Raphael), Ryzen 5 7xxxF (Raphael), Ryzen 5 7xxxX3D (Raphael), Ryzen 5 8xxxG (Phoenix), Ryzen 5 9xxx (Granite Ridge), Ryzen 5 9xxxX (Granite Ridge), Ryzen 7 7xxx (Raphael), Ryzen 7 7xxxX (Raphael), Ryzen 7 7xxxX3D (Raphael), Ryzen 7 8xxxG (Phoenix), Ryzen 7 8xxxF (Phoenix), Ryzen 7 9xxxX (Granite Ridge), Ryzen 7 9xxxX3D (Granite Ridge), Ryzen 9 7xxx (Raphael), Ryzen 9 7xxxX (Raphael), Ryzen 9 7xxxX3D (Raphael), Ryzen 9 9xxxX (Granite Ridge), Ryzen 9 9xxxX3D (Granite Ridge)- Chipset: AMD B850Slots:- PCIe x 16: 1x (of which: 16x PCIe x 16, 1x PCIe x 4)- PCIe x 1: 1- BIOS: 256 Mb Flash ROM, UEFI AMI BIOS- Form factor: µATX- Use: PC- Power supply: EPS12v 2.9 x (24 + 2x8-pin)Memory:- Maximum: 256 GB- No. of sockets: 4x DDR5- Supported standards: Up to DDR5-8000+ (OC)- Channels: 2- Maximum memory slots: 8Connections (external):- USB 3.1: 2- USB 3.0: 2- USB-A 2.0: 4- HDMI input: 1- DisplayPort: 2- Microphone: 1- Line-in: 1- Line-out: 1- RJ-45: 1Connections (internal):- SATA: 4- M.2: 3- M.2-Module Key: M- M.2 Interface: PCIe- M.2 Length: 42 - 80 mm- Addressable RGB LED header: 3- 4-pin PWM fan: 7Connections :- USB 3.0: 2- USB-C 3.2 Gen 1 (5 Gbit/s): 1- USB 2.0: 4- SATA controller: AMD B850- USB controller: AMD B850- Integrated graphics: The graphics connectors on the motherboard can only be used when using a CPU with an integrated graphics chip.- Sound: Realtek 7.1 Surround Sound Audio Codec- LAN: Realtek 2.5Gb Ethernet- Dimensions: Width: 244 mm x Height: 244 mm Tradeinn.com Delivery: in United Kingdom Report	£118.99 Buy in shop

	ASUS PRIME B850M-A-CSM AMD RYZEN DDR5 mATX Motherboard - Socket AM5 - 90MB1LQ0-M0EAYC 90MB1LQ0-M0EAYC The ASUS PRIME B850M-A-CSM motherboard enhances your AMD Ryzen experience, featuring a compact mATX design and the latest DDR... more5 support for superior memory speeds. With advanced cooling solutions and multiple connectivity options, it ensures stability and performance for gaming and productivity, harnessing the power of Socket AM5 to maximise system efficiency. Awd-it.co.uk Delivery: to United Kingdom Report	£144.99 Buy in shop

	ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX 90MB1LQ0-M0EAYC AMD Socket AM5 AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series. PC micro ATX AMD B850 7.1 channels. DDR5-... moreSDRAM 4 DIMM Maximum internal memory: 256 GB. HDD & SSD PCI Express 4.0, PCI Express 5.0 RAID support Number of storage drives supported: 7. BIOS type: UEFI AMI 256 Mbit. 2.5 Gigabit Ethernet. 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.. 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.. ASUS Control Center Express. 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.. Performance. AI Solutions. ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance.. AI Advisor. ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way.. Performance. 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.. 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.. The Digi+ voltage-regulator module (VRM) delivers real-time control over voltage droop, automatically switching frequency and power-efficiency settings.. Backtotheoffice.co.uk Delivery: in United Kingdom Report	£146.99 Buy in shop