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| Basic Information | ||
| Supported CPU | Supports AMD Ryzen 5000 & 3000 Series desktop processors | |
| Chipset | AMD B550 Chipset | |
| Form Factor | Micro ATX | |
| Memory | ||
| Number of Memory Slots | 2 | |
| Channel Supported | DDR4 | |
| Maximum Memory | 64GB |
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| Supported Memory | 2x DDR4 memory slots, support up to 64GB 1 Supports DDR4 1866/ 2133/ 2400/ 2667/ 2800/ 2933/ 3000/ 3066/ 3200 MHz by JEDEC Supports DDR4 2667/ 2800 /2933 /3000 /3066 /3200 /3466 /3600/ 3733 /3866 /4000 /4133 /4266 /4400/ 4600+ MHz by A-XMP OC MODE 1DPC 1R max speed 4600 MHz 1DPC 2R max speed 3866 MHz Dual-channel memory architecture Supports non-ECC UDIMM memory Supports ECC UDIMM memory (non-ECC mode) Supports un-buffered memory |
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| Graphics | ||
| Graphics | 1x HDMI 2.1 port, supports a maximum resolution of 4096x2160 @60Hz 1x DVI-D port, supports a maximum resolution of 1920x1200@60Hz Available for the processor with integrated graphics. Graphics specifications may vary depending on the CPU installed. |
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| Expansion Slots | ||
| Expansion Slots | PCI-E X16 x 1 PCI-E (Gen4 / Gen3) 1 x M.2 Socket |
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| Storage | ||
| Supported Storage | AMD B550 Chipset 4x SATA 6Gb/s ports 1x M.2 slot (Key M) (from AMD Processor) Supports PCIe 4.0/ 3.0 Supports SATA 6Gb/s Supports 2242/ 2260/ 2280 storage devices The supported specification depends on the installed processor. Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices Supports RAID 0 and RAID 1 for M.2 NVMe storage devices |
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| Network | ||
| LAN | 1x Realtek RTL8111H Gigabit LAN | |
| Audio | ||
| Audio | 7.1-Channel High Definition Audio | |
| Ports & Connectors | ||
| HDMI | 1 x HDMI | |
| USB Ports | 2x USB 3.2 Gen 1 5Gbps ports are available through the internal USB 3.2 Gen 1 5Gbps connector 6x USB 2.0 ports (2 Type-A ports on the back panel, 4 ports through the internal USB 2.0 connectors) AMD Processor 4x USB 3.2 Gen 1 5Gbps Type-A ports on the back panel |
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| Audio | 7.1-Channel High Definition Audio | |
| RAID | Supports RAID 0, RAID 1 and RAID 10 for SATA storage devices Supports RAID 0 and RAID 1 for M.2 NVMe storage devices |
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| TPM (Trusted Platform Module ) | 1 x TPM module connector | |
| Internal I/O Ports | 1x 24-pin ATX main power connector 1x 4-pin ATX 12V power connector 4x SATA 6Gb/s connectors 1x M.2 slots (M-Key) 1x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports) 2x USB 2.0 connectors (supports additional 4 USB 2.0 ports) 1x 4-pin CPU fan connector 1x 4-pin system fan connectors 1x Front panel audio connector 2x System panel connectors 1x Chassis Intrusion connector 1x Clear CMOS jumper |
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| Warranty | ||
| Warranty | 3 years | |
The MSI B550M-A PRO DDR4 AMD AM4 Micro-ATX Motherboard is designed to deliver reliable performance and efficiency for both gamers and professionals. Built with the AMD B550 chipset, it supports Ryzen 3000, 4000, and 5000 series processors, offering a wide range of compatibility for modern computing needs. It supports DDR4 memory up to 4400+ MHz (OC), ensuring smooth multitasking and faster system responsiveness. With PCIe 4.0 support, the board is ready for next-generation graphics cards and high-speed NVMe SSDs, delivering excellent bandwidth and data transfer performance. It also includes multiple M.2 slots and SATA ports for flexible storage options. The motherboard features MSI’s Core Boost technology for optimized power delivery and advanced thermal design for stability under demanding workloads. Its Micro-ATX form factor makes it suitable for compact builds without compromising on essential features like high-quality audio, reliable networking, and durable components. Overall, the MSI B550M-A PRO DDR4 offers a cost-effective yet powerful solution for building efficient PCs. The MSI B550M-A PRO DDR4 AMD AM4 Micro-ATX Motherboard comes with 3 years warranty.
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