Asus Prime B850M-K (Socket AM5) DDR5 Micro-ATX Motherboard

Manufacturer: Asus | Model: 90MB1LV0-M0EAY0 | Product ID: 3138
£140.96 (inc. VAT)
Availability: 0 in stock

Product Technical Specification

Form Factor
Motherboard formfactorMicro-ATX
Wi-Fi & LAN
LANYes
LAN Ports1x 2.5 Gbit/s
Wi-Fi / BluetoothNo
Colour
Primary ColourBlack
Lighting
Lighting / RGBYes
Motherboard
Motherboard ChipsetAMD B850
CPU
CPU ManufacturerAMD
CPU SocketAM5
Fan Header
4 Pin Fan Connectors4
Memory
Max. Memory128 GB
Memory TypeDDR5
Memory Form FactorDIMM
Memory slots2x
Internal Ports
CPU Power Supply1x 8-Pin

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Sun 07th Dec 2025 to Wed 10th Dec 2025
Fast & Tracked by Courier
£6.95
Fast & Tracked by Courier

Fast & Tracked by Courier (UK)

Estimated delivery date: Sat 06th Dec 2025 to Mon 08th Dec 2025
View all Delivery Options & International Rates
Component Specification
Note The specifications are subject to change without notice.
CPU AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors
* Refer to support list.
Chipset AMD B850 Chipset
Memory 2 x DIMM slots, Max. 128GB, DDR5
Supports:
- 8200+MT/s(OC) with Ryzen™ 9000
- 8400+MT/s(OC) with Ryzen™ 8000
- 8000+MT/s(OC) with Ryzen™ 7000
ECC and Non-ECC, Un-buffered DIMM
Dual Channel Architecture
Supports AMD EXPO™, ASUS AEMP
* See support list for memory compatibility and configuration details.
Graphics 1 x DisplayPort (max. 8K@30Hz, DP 1.4)
1 x HDMI™ port (max. 4K@60Hz, HDMI 2.1)
* Specs may vary by CPU. See AMD CPU specs.
Expansion Slots Ryzen™ 9000 & 7000: 1 x PCIe 5.0 x16
Ryzen™ 8000: 1 x PCIe 4.0 x16 (x8/x4)
B850 Chipset: 1 x PCIe 4.0 x16 (x4)
* Refer to bifurcation table.
Storage 2 x M.2 slots
4 x SATA 6Gb/s ports
Ryzen™ 9000 & 7000: M.2_1 PCIe 5.0 x4, M.2_2 PCIe 4.0 x4
Ryzen™ 8000: M.2_1 PCIe 4.0 x4, M.2_2 PCIe 4.0 x4/x2
AMD RAIDXpert2: RAID 0/1/5/10 (9000), RAID 0/1 (8000), RAID 0/1/10 (7000)
Ethernet 1 x Realtek 2.5Gb Ethernet, ASUS LANGuard
USB Rear: 2 x USB 10Gbps (Type-A), 2 x USB 5Gbps, 4 x USB 2.0
Front: 1 x USB-C 5Gbps, 1 x USB 5Gbps header (2 ports), 2 x USB 2.0 headers (4 ports)
* USB-C PD max: 5V/3A
Audio Realtek 7.1 Surround HD Audio CODEC
- Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Up to 24-Bit/192 kHz playback
- Audio shielding, premium capacitors, dedicated PCB layers
* Requires HD audio module chassis for 7.1 output.
Back Panel I/O 2 x USB 10Gbps, 2 x USB 5Gbps, 4 x USB 2.0
1 x DisplayPort, 1 x HDMI
1 x 2.5Gb LAN, 3 x Audio jacks
1 x BIOS FlashBack™, 1 x PS/2
Internal I/O Cooling: 1 x CPU Fan, 3 x Chassis Fan headers
Power: 1 x 24-pin, 1 x 8-pin +12V CPU
Storage: 2 x M.2, 4 x SATA
USB: 1 x USB-C 5Gbps, 1 x USB 5Gbps header, 2 x USB 2.0 headers
Misc: 3 x ARGB Gen 2, Clear CMOS, COM, F_AUDIO, S/PDIF, SPI TPM, Front Panel header
Special Features ASUS 5X PROTECTION III: DIGI+ VRM, LANGuard, Overvoltage Protection, SafeSlot, Stainless I/O
ASUS Q-Design: Q-DIMM, Q-LED Core, Q-Slot, Q-Dashboard
Thermal: M.2 heatsink, VRM heatsink
DIY: BIOS FlashBack™, LED, SafeSlot
Aura Sync: 3 x ARGB Gen 2
Software Features Armoury Crate: Aura Creator, Aura Sync, Fan Xpert 2+
AI Advisor, DriverHub, CPU-Z, TurboV Core
Creative Cloud (Trial), Norton 360 (60 Days), WinRAR (Trial)
UEFI BIOS: CrashFree, EZ Flash 3, MyHotkey, EZ Mode
BIOS 256 Mb Flash ROM, UEFI AMI BIOS
Manageability WOL by PME, PXE
Accessories 2 x SATA cables
1 x I/O Shield
1 x M.2 Rubber Package
1 x M.2 Screw package
1 x Quick Start Guide
Operating System Windows® 11, Windows® 10 64-bit
Form Factor micro-ATX, 9.6 x 8.7 inches (24.4 x 22.1 cm)
Form Factor
Motherboard formfactorMicro-ATX
Wi-Fi & LAN
LANYes
LAN Ports1x 2.5 Gbit/s
Wi-Fi / BluetoothNo
Colour
Primary ColourBlack
Lighting
Lighting / RGBYes
Motherboard
Motherboard ChipsetAMD B850
CPU
CPU ManufacturerAMD
CPU SocketAM5
Fan Header
4 Pin Fan Connectors4
Memory
Max. Memory128 GB
Memory TypeDDR5
Memory Form FactorDIMM
Memory slots2x
Internal Ports
CPU Power Supply1x 8-Pin

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Buykingston order despatch times:

We will despatch your order the very same day if we receive cleared payment by 12:00 pm Mon-Fri.

These delivery estimates apply when you order up to 12:00 pm Mon-Fri (excluding public holidays).

We charge a one off delivery cost as outlined below regardless of how many items you order or the weight of your order.

Estimated delivery times are provided to us by the respective delivery companies. We pass this information onto you, the customer.

Despatch times do not apply to UK public holidays.

Estimated delivery times are taken from the next available working day available for delivery. For example if an order was despatched on a working Wednesday by 3pm, the first available working day for delivery would be Thursday provided you placed your order by 3pm on the Wednesday. If the next available weekday is a UK bank holiday/public holiday then your order will be despatched on the next available working day.

Our warehouse reserves the right to upgrade the delivery method you select on your order.

Our available delivery options*

Contact us for a shipping quote.

*All delivery times are estimated unless stated.

Product Returns Note

Buykingston offers a very flexible and hassle free returns policy. If for whatever reason you are not happy with the item purchased you can return it to us within 12months for a refund (for unused and unopened items) or within 30 days on opened and used items for a refund. This applies to items purchased direct through Buykingston  only.

Our 30 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items opened and used and that are returned in a resellable condition.

Our 365 Day Returns Money Back Guarantee Satisfaction Guarantee:
For items that remain sealed and unused.

Some items are excluded from our moneyback guarantee unless they have developed a fault. These include;

- Headphones
- Earphones
- Custom made and designed products such as flash memory products with custom logo’s on them. E,g USB flash drives and memory cards with your own logo

Returns FAQs

What is your returns criteria?
On opened items 30 days from date of receipt or expected date of receipt on non tracked items.
On unopened items 365 days.

How do i go about returning my order?
Please contact us via our contact page with your order number where we will present you with an RMA number and returns label.

Do i need to contact you before returning my order?
Yes, to obtain an RMA number.

Does my item have to include its original packaging?
Yes for items that fall within our 30 day money back guarantee and our 365 day returns. Of course for faulty items we realise you may no longer have the packaging.

Who deals with the warranty on a faulty item?
We will. In some circumstances we may ask you to contact the manufacturer direct for assistance.

Please ensure you have read and comply in full with Section 11 & 13 of our terms and conditions which you can read here in full.