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- Asus PRIME B550M-A WIFI II, AMD B550, AM4, Micro ATX, 4 DDR4, VGA, DVI, HDMI, Wi-Fi, PCIe4, 2x M.2 Asus PRIME B550M-A WIFI II, AMD B550, AM4, Micro ATX, 4 DDR4, VGA, DVI, HDMI, Wi-Fi, PCIe4, 2x M.2
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AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB lighting support
- AMD AM4 Socket: Ready for Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors
- Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers, and Fan Xpert 2+ utility
- Ultrafast Connectivity: Dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A support
- Aura Sync RGB Lighting: Onboard addressable Gen 2 header and RGB headers for RGB LED strips, easily synced with Aura Sync-capable hardware
Prime
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 – maximising your productivity.
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.
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.
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 customise your system to create a uniquely personal look.
Description
Specification
- Motherboard Type: Desktop
- Form Factor: Micro ATX
- Socket: AMD AM4
- Chipset: AMD B550
- #Hide#DDR Type: DDR4
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CPU Support: Click here for CPU support
*Note: not compatible with Ryzen 5 3400G & Ryzen 3 3200G CPUs - RAM Technology: DDR4 (Dual Channel)
- RAM Slots: 4 x DIMM
- RAM Speeds: Up to 4866(OC)
- Maximum Memory: 128GB
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Graphics: Integrated Graphics Processor*
Graphics specifications may vary between CPU types -
Graphics Ports: 1 x VGA
1 x DVI-D
1 x HDMI -
PCI/PCI Express: 1 x PCIe 4.0 x16 (x16 mode)
2 x PCIe 3.0 x1 -
Storage: 4 x SATA III
1 x M.2 (2242/2260/2280/22110) - SATA & PCIe
1 x M.2 (2242/2260/2280) - SATA & PCIe - RAID: "RAID 0, 1, 10"
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Wireless: 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax)
Supports 2.4/5GHz frequency band
Bluetooth v5.2 - LAN: GB LAN
- Audio: Realtek 7.1 Surround Sound High Definition Audio CODEC
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USB Ports Supported: "2 x USB 3.2 Gen2 Type-A (at back)
6 x USB 3.2 Gen1 (4 at back, 2 at mid-board)
4 x USB 2.0 (at mid-board)" -
Back Panel I/O Ports: 2 x USB 3.2 Gen2 Type-A
4 x USB 3.2 Gen1 Type-A
1 x D-Sub
1 x DVI-D
1 x HDMI
1 x Wi-Fi Module
1 x Realtek 1Gb Ethernet
3 x Audio jacks
1 x PS/2 Keyboard/Mouse combo -
Internal I/O Connectors: 1 x 4-pin CPU Fan
1 x 4-pin CPU OPT Fan
2 x 4-pin Chassis Fan
1 x 24-pin Main
1 x 8-pin +12V
2 x M.2 (Key M)
4 x SATA 6Gb/s
1 x USB 3.2 Gen1
2 x USB 2.0
1 x Addressable Gen2
2 x AURA RGB
1 x Clear CMOS -
.: 1 x COM Port
1 x Front Audio
1 x S/PDIF Out
1 x Speaker
1 x SPI TPM (14-1pin)
1 x 10-1 pin System Panel -
Accessories: 2 x SATA 6Gb/s cables
1 x ASUS Wi-Fi moving antennas
1 x I/O Shield
1 x M.2 SSD screw package
1 x Support DVD
1 x User manual - Additional Features: See Overview
- Package Type: Retail
- Package Weight: 1.3000 kg
- Warranty: 3 Years
- #Hide#M.2 Slot(s): Yes (M.2)
- #Hide#No. LAN Ports: 1 x LAN
- #Hide#Max LAN Speed: GB LAN
- #Hide#Wi-Fi: Yes (Wi-Fi)
Delivery & Shipping Policy
Last updated: 19/09/2025
At Tech Direct UK, we aim to get your order to you as quickly and efficiently as possible. Please see below for our delivery terms.
1. Delivery Options & Costs
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Free Delivery – Orders over £50 qualify for free UK standard delivery.
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Standard Delivery – Orders under £50 are charged at £4.99.
2. Delivery Times
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Next Day Delivery – The majority of items are shipped via next day courier if ordered before 2:00pm (Monday–Friday).
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Orders placed after 2:00pm, on weekends, or bank holidays will be processed the next working day.
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Larger or Heavy Items – Certain products (e.g., heavy furniture, oversized goods) may take 2–5 working days for delivery. Estimated times will be displayed at checkout.
3. Delivery Areas
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We deliver to all mainland UK addresses.
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Deliveries to remote areas (e.g., Highlands, Islands, Northern Ireland) may take longer or incur additional charges — these will be shown at checkout before confirming your order.
4. Tracking Your Order
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Once dispatched, you will receive an email confirmation with tracking details (where available).
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You can track your delivery via the courier’s website.
5. Missed Deliveries
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If you are not available at the time of delivery, the courier will leave a card or attempt redelivery.
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Repeated failed delivery attempts may result in the parcel being returned to us. In this case, re-delivery charges may apply.
6. Risk of Loss
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Risk of loss or damage to the goods passes to you once they are delivered.
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Please inspect your order upon receipt and notify us of any issues within 48 hours.
7. Contact Us
If you have any questions about delivery, please contact us:
📧 Email: support@techdirectuk.com