ASUS · Motherboard

ASUS PRIME B850M-A-CSM price in United Kingdom

MPN 90MB1LQ0-M0EAYCEAN 199291054721EAN 4711636054706

SpeedNot available
ColourGrey
Processor manufacturerAMD
Supported memory typesDDR5-SDRAM

Lowest price incl. delivery

£129.33

at PCHUB.UKFree deliveryIn stock

3 stores
Range £129.33 – £150.99
Save up to £21.66 vs. the dearest store
3 in stock
2 with free delivery
Checked 6 Oct 2026, 05:40 UTC

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Full specifications and side-by-side comparison

Prices in United Kingdom

3 stores · prices in GBP · updated 6 Oct 2026, 05:40 UTC

Lowest price£129.33at PCHUB.UK · free shippingGo to PCHUB.UK

Price range across 3 offers

Save up to £21.66 (14%) by choosing the cheapest store

3 of 3 stores in stock
2 with free shipping
Checked 6 Oct 2026, 05:40 UTC

PCHUB.UKLowest priceASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX In stockFree shipping
£129.33incl. free shipping
Go to store : PCHUB.UK (opens in a new tab)
Back to the OfficeASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX In stockFree shipping
£150.99incl. free shipping+£21.66 (17%) vs lowest
Go to store : Back to the Office (opens in a new tab)
PcNova.co.ukASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX In stockShipping not stated
£129.33item price, shipping extra
Go to store : PcNova.co.uk (opens in a new tab)

Ad: we may earn a commission when you buy through these links; it never changes the order, which is by total price only. Prices and stock are shown as each store states them, as of 6 Oct 2026, 05:40 UTC, and can change at any time. Taxes are included only where the store includes them.

Price history in United Kingdom

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Best price · PCHUB.UK£129.33

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Product details

Identification

Brand: ASUS
Product: PRIME B850M-A-CSM
Full name: ASUS PRIME B850M-A-CSM AMD B850 Socket AM5 micro ATX
Manufacturer part number: 90MB1LQ0-M0EAYC
EAN / UPC: 199291054721, 4711636054706, 4711636054720
Category: Motherboard

90 specifications from the manufacturer's data sheet

Processor

Processor manufacturer	AMD
Processor socket	Socket AM5
Compatible processor series	AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series
Supported processor sockets	Socket AM5

Memory

Supported memory types	DDR5-SDRAM
Number of memory slots	4
Memory slots type	DIMM
Memory channels	Dual-channel
ECC сompatibility	ECC & Non-ECC
Supported memory clock speed (max)	8000 MHz
Maximum internal memory	256 GB
Unbuffered memory	Yes
Maximum internal memory per slot	64 GB

Storage controllers

Supported storage drive types	HDD & SSD
Supported storage drive interfaces	PCI Express 4.0, PCI Express 5.0
Number of HDDs supported	4
Number of storage drives supported	7
RAID support	Yes
RAID levels	0, 1, 5, 10

Graphics

Parallel processing technology support	Not supported
Maximum resolution	7680 x 4320 pixels

Internal I/O

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
Number of SATA III connectors	4
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 CPU fan connectors	1
Number of chassis fan connectors	3
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
12V power connector	Yes
Number of COM connectors	1
TPM connector	Yes
RGB LED pin header	Yes
Number of RGB LED pin headers	3

Rear panel I/O ports

USB 2.0 ports quantity	4
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
Ethernet LAN (RJ-45) ports	1
VGA (D-Sub) ports quantity	0
HDMI ports quantity	1
HDMI version	2.1
DVI-D ports quantity	0
DisplayPorts quantity	2
DisplayPort version	1.4
Headphone outputs	1
Line-in	Yes
Microphone in	Yes

Network

Ethernet LAN	Yes
Ethernet interface type	2.5 Gigabit Ethernet
Wi-Fi	No
Top Wi-Fi standard	Not available

Features

Component for	PC
Motherboard form factor	micro ATX
Motherboard chipset family	AMD
Motherboard chipset	AMD B850
Audio output channels	7.1 channels
Product colour	Grey
Cooling type	Passive
Power source type	ATX
Windows operating systems supported	Windows 10 x64, Windows 11

Expansion slots

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