ASUS PRIME B550-PLUS AMD B550 Socket AM4 ATX

Manufacturer: Asus | Model: 90MB14U0-M0EAY0 | Product ID: 4590
£130.37 (inc. VAT)
Availability: 0 in stock

Product Technical Specification

Processor
Processor manufacturerAMD
Processor socketSocket AM4
Compatible processor seriesAMD Ryzen 3 3rd Gen,AMD Ryzen 5 3rd Gen,AMD Ryzen 7 3rd Gen,AMD Ryzen 9 3rd Gen
Memory
Supported memory typesDDR4-SDRAM
Number of memory slots4
Memory slots typeDIMM
Supported memory clock speeds2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600
Maximum internal memory128
Storage controllers
Supported storage drive interfacesM.2,SATA
Graphics
Parallel processing technology support2-Way CrossFireX
Internal I/O
USB 2.0 connectors2
USB 3.2 Gen 1 (3.1 Gen 1) connectors1
Rear panel I/O ports
USB 2.0 ports quantity2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity2
Ethernet LAN (RJ-45) ports1
HDMI ports quantity1
DisplayPorts quantity1
Network
Ethernet LANYes
LAN controllerRealtek RTL8111H
Wi-FiNo
Features
Motherboard chipsetAMD B550
Motherboard form factorATX
Motherboard chipset familyAMD
BIOS
BIOS typeUEFI AMI
BIOS memory size256

Delivery Options

Economy Delivery
FREE
Economy Delivery

Economy Delivery (UK)

Estimated delivery date: Wed 26th Aug 2026 to Sat 29th Aug 2026
Fast & Tracked by Courier
£6.95
Fast & Tracked by Courier

Fast & Tracked by Courier (UK)

Estimated delivery date: Tue 25th Aug 2026 to Thu 27th Aug 2026
View all Delivery Options & International Rates

ASUS Prime series is expertly engineered to unleash the full potential of 3rd Generation AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features.

Tune It Your Way
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.

Cool to the Core
Prime B550 series is engineered with multiple onboard heatsinks and an array of hybrid fan headers to ensure your rig stays cool and stable under intense workloads.

VRM Heatsink and Thermal Pads
Two massive VRM heatsinks with underneath thermal pads improve heat transfer from the MOSFETs and chokes for better cooling performance.

Build on a Solid Foundation
Prime B550 motherboard provides all the fundamentals to boost daily productivity, so your system will be ready for action with stable power, intuitive cooling and flexible transfer options.

PCIe 4.0 M.2
(up to 64 Gbps)
Achieve Speed With Onboard M.2
PCIe 4.0 M.2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost. Create a RAID configuration with up to 64Gbps PCIe 4.0 storage device to enjoy the fastest data-transfer speeds on the 3rd Generation AMD Ryzen platform.

Little Things Make a Big Difference
Prime B550 series adds the nuanced details that improve every experience, from exclusive codecs that provide pristine audio quality to intuitive RGB lighting controls that let you customize your system to create a uniquely personal look.

Outstanding Audio
Combined onboard features deliver elevated audio
Intelligent design and premium hardware create audio quality unlike anything you've ever experienced.

Processor
Processor manufacturerAMD
Processor socketSocket AM4
Compatible processor seriesAMD Ryzen 3 3rd Gen,AMD Ryzen 5 3rd Gen,AMD Ryzen 7 3rd Gen,AMD Ryzen 9 3rd Gen
Memory
Supported memory typesDDR4-SDRAM
Number of memory slots4
Memory slots typeDIMM
Supported memory clock speeds2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4600
Maximum internal memory128
Storage controllers
Supported storage drive interfacesM.2,SATA
Graphics
Parallel processing technology support2-Way CrossFireX
Internal I/O
USB 2.0 connectors2
USB 3.2 Gen 1 (3.1 Gen 1) connectors1
Rear panel I/O ports
USB 2.0 ports quantity2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity2
Ethernet LAN (RJ-45) ports1
HDMI ports quantity1
DisplayPorts quantity1
Network
Ethernet LANYes
LAN controllerRealtek RTL8111H
Wi-FiNo
Features
Motherboard chipsetAMD B550
Motherboard form factorATX
Motherboard chipset familyAMD
BIOS
BIOS typeUEFI AMI
BIOS memory size256

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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 simple, hassle-free returns policy. If for whatever reason you are not happy with the item purchased, you can return it to us within 14 days of receipt for a refund. This applies to items purchased direct through Buykingston only.

Our 14 Day Returns Money Back Guarantee:
For items returned in resaleable condition, with all original packaging. If an item has been opened for inspection but shows signs of use beyond that, a deduction may apply to reflect the reduced value — see our full Terms & Conditions (Section 12) for details.

Some items are excluded from our money-back guarantee unless they have developed a fault. These include:

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

Returns FAQs

What is your returns criteria?
14 days from date of receipt, or expected date of receipt on non-tracked items.

How do I go about returning my order?
Please contact us via our contact page with your order number. We will provide you with an RMA number and return instructions, including your return deadline and whether a freepost label applies to your order.

Do I need to contact you before returning my order?
Yes, to obtain an RMA number before sending anything back.

Does my item have to include its original packaging?
Yes, to qualify for our 14 day money-back guarantee. For faulty items, we understand you may no longer have the original packaging.

Who pays for return postage?
If your item is faulty, damaged, or not as described, we cover reasonable return postage, or provide a freepost label where available. If you are returning an item for another reason (including simply changing your mind), you are responsible for return postage unless we have expressly confirmed a freepost label in your RMA email — we recommend using a tracked and insured service for items of significant value.

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

Please ensure you have read and comply in full with Sections 11–13 of our Terms & Conditions.