MSI B550-A PRO ATX Motherboard | AM4 | 4x DDR4 Slots
KEY FEATURES
- Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS update
- Supports DDR4 Memory, up to 4400(OC) MHz
- Lightning Fast Experience: PCIe 4.0, Lightning Gen4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2
- Premium Thermal Solution: Extended Heatsink Design with additional choke thermal pad and 7W/mK pad, and M.2 Shield Frozr are built for high performance system and non-stop works
- Powerful Design: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, Creator Genie, DDR4 Boost
- Audio Boost: Reward your ears with studio grade sound quality
- Multi-GPU: With Steel armor PCI-E slots. Supports 2-Way AMD Crossfire
- Dragon Center: A brand new software which integrates all MSI exclusive tools with user friendly user interface
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Frequently Asked Questions
How many memory slots does the motherboard have?
Does the motherboard support RGB lighting?
What is the maximum storage speed supported?
MSI B550-A PRO ATX Motherboard | AM4 | 4x DDR4 Slots
Description
The MSI B550-A PRO is an ATX motherboard built around AMD's B550 chipset, designed for builders who want solid performance and modern features without paying enthusiast prices. With its AM4 socket, it supports AMD Ryzen 3000 series processors and offers a practical foundation for mainstream gaming and productivity builds. The black PCB keeps things understated while delivering the connectivity and expansion options most users need.
Memory support extends up to 128GB across four DDR4 slots, with speeds reaching 4800MHz for those who want to push performance with high-speed kits. The board includes one PCIe 4.0 x16 slot for your graphics card plus two additional PCIe 3.0 x1 slots for expansion cards. Connectivity covers the essentials with HDMI and DisplayPort outputs, USB 3.2 ports, Gigabit Ethernet, and SATA III connections for storage. An RGB LED header lets you add some lighting if that's your preference.
Setup is straightforward with support for memory profiles that automatically configure your RAM to its rated speeds. The board accommodates both ECC and standard memory modules, giving flexibility for different use cases. MSI includes an I/O shield and user documentation to get you started, along with the necessary mounting hardware for a clean installation.
Feature
Easy 14 days Returns
Eligible for Next day Delivery
100% Money-back guarantee
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Shipping Information
- Next Business Day: £6.99
- 2 days Delivery: £4.99
- 3- 5 Days Shipping: £3.99
- Orders Over £99.00: Free Standard Delivery
| Processor | |
|---|---|
| Processor manufacturer | AMD |
| Processor socket | Socket AM4 |
| Compatible processor series | AMD Ryzen 3000 Series |
| Maximum number of SMP processors | 1 |
| Memory | |
|---|---|
| Supported memory types | DDR4-SDRAM |
| Number of memory slots | 4 |
| Memory slots type | DIMM |
| Memory channels | Dual-channel |
| ECC сompatibility | ECC & Non-ECC |
| Supported memory clock speeds | 1866,2133,2400,2667,2800,2933,3000,3066,3200,3466,3600,3733,3866,4000,4133,4266,4400,4800 MHz |
| Maximum internal memory | 128 GB |
| Storage controllers | |
|---|---|
| Supported storage drive types | HDD & SSD |
| Supported storage drive interfaces | SATA III |
| RAID levels | 0, 1, 10 |
| Graphics | |
|---|---|
| Maximum graphics card memory | 16000 MB |
| Parallel processing technology support | 2-Way CrossFireX |
| On-board graphics card | No |
| Maximum resolution | 4096 x 2160 pixels |
| Internal I/O | |
|---|---|
| USB 2.0 connectors | 2 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 1 |
| Number of SATA III connectors | 6 |
| Front panel audio connector | Yes |
| ATX Power connector (24-pin) | Yes |
| CPU fan connector | Yes |
| Number of chassis fan connectors | 6 |
| Chassis intrusion connector | Yes |
| 12V power connector | Yes |
| TPM connector | Yes |
| RGB LED pin header | Yes |
| 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 2 (3.1 Gen 2) Type-A ports quantity | 1 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| PS/2 ports quantity | 1 |
| HDMI ports quantity | 1 |
| DisplayPorts quantity | 1 |
| Network | |
|---|---|
| Ethernet LAN | Yes |
| Ethernet interface type | Gigabit Ethernet |
| LAN controller | Realtek 8111H |
| Wi-Fi | No |
| Features | |
|---|---|
| Component for | PC |
| Motherboard form factor | ATX |
| Motherboard chipset family | AMD |
| Motherboard chipset | AMD B550 |
| Audio chip | Realtek ALC892 |
| Audio output channels | 7.1 channels |
| Product colour | Black |
| Number of mounting holes | 9 |
| Harmonized System (HS) code | 84733020 |
| Expansion slots | |
|---|---|
| PCI Express x1 (Gen 3.x) slots | 2 |
| PCI Express x16 (Gen 4.x) slots | 1 |
| PCI Express x16 (Gen 3.x) slots | 1 |
| Number of M.2 (M) slots | 2 |
| BIOS | |
|---|---|
| Clear CMOS jumper | Yes |
| Weight & dimensions | |
|---|---|
| Width | 305 mm |
| Depth | 244 mm |
| Height | 65 mm |
| Packaging content | |
|---|---|
| Cables included | SATA |
| Drivers included | Yes |
| Other features | |
|---|---|
| Weight | 1 kg |
Frequently Asked Questions
How many memory slots does the motherboard have?
Does the motherboard support RGB lighting?
What is the maximum storage speed supported?
What processors are compatible with the MSI B550-A PRO?
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