| Brand | MSI |
| Series | PRO |
| Model | B550-A PRO |
| CPU Socket Type | AM4 |
| CPU Type | Supports AM4 socket 3rd Gen AMD Ryzen processors, and future AMD Ryzen processors with BIOS update. |
| Chipset | AMD B550 |
| Number of Memory Slots | 4x288pin |
| Memory Standard | Supports DDR4 3200/ 3066/ 3000/ 2933/ 2800/ 2667/ 2400/ 2133/ 1866 MHz by JEDECSupports DDR4 4400+/ 4266/ 4133/ 4000/ 3866/ 3733/ 3600/ 3466/ 3200/ 3066/ 3000/ 2933/ 2800/ 2667 MHz by A-XMP OC MODE1DPC 1R Max speed 4800 MHz1DPC 2R max speed 3866 MHz2DPC 1R max speed 4000 MHz2DPC 2R max speed 3600 MHz |
| Maximum Memory Supported | 128GB |
| Channel Supported | Dual Channel |
| PCI Express 4．0 x16 | 1 x PCIe 4.0/3.0 x16 slot (PCI_E1) ** The supported specification depends on installed processor. |
| PCI Express 3．0 x16 | 1 x PCIe 3.0 x16 slot (PCI_E3), supports x4 speed **** When installing PCIe SSD in M.2_2, PCI_E3 slot will be unavailable. |
| PCI Express x1 | 2 x PCIe 3.0 x1 slots |
| SATA 6Gb/s | 6 x SATA 6Gb/s |
| M．2 | 2 x M.2 slots (Key M)M2_1 slot (from AMD Processor)Supports PCIe 4.0/3.0 x4 *Supports SATA 6Gb/sSupports 2242/2260/2280/22110 storage devicesM2_2 slot (from AMD B550 chipset)Supports PCIe 3.0 x4Supports 2242/2260/2280 storage devices* The supported specification depends on installed processor. |
| SATA RAID | 0/1/10 |
| Onboard Video Chipset | Supported only by CPU with integrated graphic:1 x HDMI port, supports a maximum resolution of 4096x2160 @24Hz 1 x DisplayPort, supports a maximum resolution of 4096x2160 @60Hz Maximum shared memory of 2048MB* Available for the processor with integrated graphics. |
| Audio Chipset | Realtek ALC892 |
| Audio Channels | 7.1 Channels |
| LAN Chipset | Realtek RTL8111H |
| Max LAN Speed | 10/100/1000Mbps |
| Back I/O Ports | 1 x DisplayPort / 1 x HDMI / 1 x LAN (RJ45) / 1 x PS/2 Keyboard/Mouse Combo / 1 x USB 3.2 Gen 2 Type-A / 1 x USB 3.2 Gen 2 Type-C / 2 x USB 3.2 Gen 1 Type-A / 4 x USB 2.0/1.1 / 6 x Audio Jacks |
| Onboard USB | 1 x USB 3.2 Gen 1 5Gbps Type-C port1 x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports)2 x USB 2.0 connectors (supports additional 4 USB 2.0 ports) |
| Other Connectors | 1 x 4-pin CPU fan connector1 x 4-pin water-pump fan connector6 x 4-pin system fan connectors1 x Front panel audio connector2 x System panel connectors1 x Chassis Intrusion connector1 x 4-pin RGB LED connector2 x 3-pin RAINBOW LED connectors1 x TPM module connector1 x Clear CMOS jumper |
| Form Factor | ATX |
| LED Lighting | RGB |
| Dimensions (W x L) | 12.0" x 9.6" |
| Power Pin | 1 x 24-pin ATX main power connector1 x 8-pin ATX 12V power connector |
| Features | Support for 3rd Gen AMD Ryzen processors and future AMD Ryzen processors with BIOS updateSupports DDR4 Memory, up to 4400(OC) MHzLightning Fast Experience: PCIe 4.0, Lightning Gen4 x4 M.2 with M.2 Shield Frozr, AMD Turbo USB 3.2 Gen 2Premium 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 worksPowerful Design: Core Boost, Digital PWM IC, 2oz Thickened Copper PCB, Creator Genie, DDR4 BoostAudio Boost: Reward your ears with studio grade sound qualityMulti-GPU: With Steel armor PCI-E slots. Supports 2-Way AMD CrossfireDragon Center: A brand new software which integrates all MSI exclusive tools with user friendly user interface |
| Parts | 3 Year |
| Warranty | 3 Years |
| Country Of Origin | China |
