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ASUS Mainboard PRIME B850M-A-CSM1/9
ASUS

ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX

Part number
1879457
MPN
90MB1LQ0-M0EAYC
EAN
4711636054720

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

Memory slots typeDIMM
Processor socketSocket AM5
ChipsatzB850
Mainboard FormfaktorMicro-ATX
Wi-FiNo
Processor manufacturerAMD
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor socketsSocket AM5
All 92 specifications

Description

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

Documents

Specifications

Memory slots typeDIMM
Processor socketSocket AM5
ChipsatzB850
Mainboard FormfaktorMicro-ATX
Wi-FiNo

Processor

Processor manufacturerAMD
Compatible processor seriesAMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor socketsSocket AM5

Memory

Supported memory typesDDR5-SDRAM
Number of memory slots4
Maximum internal memory256 GB
Memory channelsDual-channel
ECC сompatibilityECC & Non-ECC
Supported memory clock speed (max)8000 MHz
Unbuffered memoryYes
Maximum internal memory per slot64 GB

Storage controllers

Supported storage drive interfacesPCI Express 4.0, PCI Express 5.0
Supported storage drive typesHDD & SSD
Number of HDDs supported4
Number of storage drives supported7
RAID supportYes
RAID levels0, 1, 5, 10

Graphics

Parallel processing technology supportNot supported
Maximum resolution7680 x 4320 pixels

Internal I/O

USB 2.0 connectors2
USB 3.2 Gen 1 (3.1 Gen 1) connectors2
USB 3.2 Gen 2 (3.1 Gen 2) connectors0
Number of SATA III connectors4
S/PDIF out connectorYes
Front panel audio connectorYes
Front panel connectorYes
ATX Power connector (24-pin)Yes
CPU fan connectorYes
Number of CPU fan connectors1
Number of chassis fan connectors3
Chassis intrusion connectorYes
Peripheral (Molex) power connectors (4-pin)1
EPS power connector (8-pin)Yes
Number of EPS power connectors (8-pin)1
Number of COM connectors1
TPM connectorYes
12V power connectorYes
RGB LED pin headerYes
Number of RGB LED pin headers3

Rear panel I/O ports

USB 2.0 ports quantity4
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantity0
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity2
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity0
Ethernet LAN (RJ-45) ports1
VGA (D-Sub) ports quantity0
HDMI ports quantity1
DVI-D ports quantity0
HDMI version2.1
DisplayPorts quantity2
DisplayPort version1.4
Headphone outputs1
Line-inYes
Microphone inYes

Network

Ethernet LANYes
Ethernet interface type2.5 Gigabit Ethernet
Top Wi-Fi standardNot available

Features

Component forPC
Motherboard form factormicro ATX
Motherboard chipset familyAMD
Motherboard chipsetAMD B850
Audio output channels7.1 channels
Product colourGrey
Cooling typePassive
Power source typeATX
Windows operating systems supportedWindows 10 x64, Windows 11

Expansion slots

PCI Express x16 (Gen 4.x) slots2
PCI Express x16 (Gen 5.x) slots1
Number of M.2 (M) slots3
1st M.2 largest key size2280
1st M.2 highest PCI Express generation5.0
2nd M.2 largest key size2280
2nd M.2 highest PCI Express generation4.0
3rd M.2 largest key size2280
3rd M.2 highest PCI Express generation4.0
4th M.2 largest key size2280
4th M.2 highest PCI Express generation4.0

BIOS

BIOS typeUEFI AMI
BIOS memory size256 Mbit

Packaging data

Package width275 mm
Package depth275 mm
Package height67.5 mm
Package weight1.45 kg

Weight & dimensions

Width244 mm
Depth244 mm

Packaging content

Cables includedSATA
Screws includedYes
Weight1.36 kg

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