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

SKU

90MB1LQ0-M0EAYC

In Stock

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)

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Specifications

Internal I/O
Number of M.2 (M) slots	3
USB 3.2 Gen 2 (3.1 Gen 2) connectors	0
Front panel connector	Yes
12V power connector	Yes
Supported storage drive interfaces	PCI Express 4.0, PCI Express 5.0
USB 2.0 connectors	2
USB 3.2 Gen 1 (3.1 Gen 1) connectors	2
TPM connector	Yes
S/PDIF out connector	Yes
Peripheral (Molex) power connectors (4-pin)	1
Number of SATA III connectors	4
Number of COM connectors	1
Number of chassis fan connectors	3
Front panel audio connector	Yes
EPS power connector (8-pin)	Yes
CPU fan connector	Yes
Chassis intrusion connector	Yes
ATX Power connector (24-pin)	Yes
RGB LED pin header	Yes
Number of CPU fan connectors	1
Number of EPS power connectors (8-pin)	1
Number of RGB LED pin headers	3
Technical details
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
Supported processor sockets	Socket AM5
Parallel processing technology support	Not supported
HDMI version	2.1
Cooling type	Passive
Motherboard form factor	micro ATX
Component for	PC
Audio
Audio output channels	7.1 channels
Performance
Number of HDDs supported	4
Supported storage drive types	HDD & SSD
Windows operating systems supported	Windows 10 x64, Windows 11
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
RAID levels	0, 1, 5, 10
Supported processor sockets	Socket AM5
Cooling type	Passive
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Processor
Processor manufacturer	AMD
Compatible processor series	AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets	Socket AM5
Processor socket	Socket AM5
Memory
Number of memory slots	4
Memory slots type	DIMM
Supported memory types	DDR5-SDRAM
Memory channels	Dual-channel
Maximum internal memory	256 GB
Unbuffered memory	Yes
Supported memory clock speed (max)	8000 MHz
ECC сompatibility	ECC & Non-ECC
Maximum internal memory per slot	64 GB
Storage controllers
Number of HDDs supported	4
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 storage drives supported	7
RAID support	Yes
Graphics
Parallel processing technology support	Not supported
Maximum resolution	7680 x 4320 pixels
Rear panel I/O ports
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
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity	2
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity	0
DisplayPort version	1.4
USB 2.0 ports quantity	4
VGA (D-Sub) ports quantity	0
Microphone in	Yes
Headphone outputs	1
HDMI version	2.1
HDMI ports quantity	1
Ethernet LAN (RJ-45) ports	1
DVI-D ports quantity	0
DisplayPorts quantity	2
Line-in	Yes
Network
Ethernet LAN	Yes
Wi-Fi	No
Ethernet interface type	2.5 Gigabit Ethernet

Features
Power source type	ATX
Windows operating systems supported	Windows 10 x64, Windows 11
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
Supported processor sockets	Socket AM5
Cooling type	Passive
Audio output channels	7.1 channels
Motherboard form factor	micro ATX
Component for	PC
Product colour	Grey
Expansion slots
Number of M.2 (M) slots	3
PCI Express x16 (Gen 4.x) slots	2
PCI Express x16 (Gen 5.x) slots	1
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
BIOS
BIOS type	UEFI AMI
BIOS memory size	256 Mbit
Power
Power source type	ATX
Video
Maximum resolution	7680 x 4320 pixels
Packaging data
Package width	275 mm
Package depth	275 mm
Package height	67.5 mm
Package weight	1.45 kg
Software
Windows operating systems supported	Windows 10 x64, Windows 11
Weight & dimensions
Package width	275 mm
Package depth	275 mm
Package height	67.5 mm
Package weight	1.45 kg
Width	244 mm
Depth	244 mm
Packaging content
Cables included	SATA
Screws included	Yes
Other features
Package width	275 mm
Package depth	275 mm
Package height	67.5 mm
Package weight	1.45 kg

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Manufacturer	ASUS	ASUS	ASUS	ASUS	ASUS	Gigabyte
Processor manufacturer	AMD	AMD	AMD	AMD	AMD	Intel
Motherboard form factor	micro ATX	micro ATX	ATX	ATX	ATX	ATX
Processor socket	Socket AM5	Socket AM4	Socket AM4	Socket AM4	Socket AM5	LGA 1700
Supported memory types	DDR5-SDRAM	DDR4-SDRAM	DDR4-SDRAM	DDR4-SDRAM	DDR5-SDRAM	DDR5-SDRAM
Component for	PC	N/A	PC	PC	PC	PC
Number of memory slots	4 to 6	4 to 6	4 to 6	4 to 6	4 to 6	4 to 6