MSI PRO B840M-B
Motherboard | micro ATX | Socket AM5 | AMD B840 Chipset | USB 3.2 Gen 2, USB 3.2 Gen 1, USB-C 3.2 Gen 1 | 2.5 Gigabit LAN | onboard graphics (CPU required) | HD Audio (8-channel)
Main Specification
| Product Description | MSI PRO B840M-B - motherboard - micro ATX - Socket AM5 - AMD B840 |
|---|---|
| Product Type | Motherboard - micro ATX |
| Chipset Type | AMD B840 |
| Processor Socket | 1 x Socket AM5 |
| Compatible Processors | Ryzen (supports Ryzen 7000/8000/9000 Series) |
| Max RAM Size | 128 GB |
| RAM Supported | 2 DIMM slots - DDR5, non-ECC, on-die ECC, unbuffered |
| Storage Ports | 4 x SATA-600 (RAID), 2 x M.2 |
| USB / FireWire Ports | 4 x USB 3.2 Gen 1 + 2 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 via headers) |
| Audio | HD Audio (8-channel) |
| LAN | 2.5 Gigabit Ethernet |
General
| Product Type | Motherboard - micro ATX |
|---|---|
| Chipset Type | AMD B840 |
| Processor Socket | Socket AM5 |
| Max Processors Qty | 1 |
| Compatible Processors | Ryzen (supports Ryzen 7000/8000/9000 Series) |
Supported RAM
| Max Size | 128 GB |
|---|---|
| Technology | DDR5 |
| Bus Clock | 4800 MT/s, 5600 MT/s, 5600 MT/s (O.C.), 7200 MT/s (O.C.), 8000 MT/s (O.C.) |
| Supported RAM Integrity Check | Non-ECC, on-die ECC |
| Registered or Buffered | Unbuffered |
| Features | AMD EXPO technology, dual channel memory architecture |
Audio
| Type | HD Audio (8-channel) |
|---|---|
| Audio Codec | Realtek ALC897 |
| Compliant Standards | High Definition Audio |
LAN
| Network Controller | Realtek RTL8125D |
|---|---|
| Network Interfaces | 2.5 Gigabit Ethernet |
Expansion / Connectivity
| Expansion Slots | 1 x CPU 2 x DIMM 288-pin 1 x PCIe 4.0 x16 1 x PCIe 3.0 x1 2 x M.2 socket (2260/2280 M.2 Key M slot) |
|---|---|
| Storage Interfaces | SATA-600 -connectors: 4 x 7pin Serial ATA - RAID 0 / RAID 1 / RAID 10 PCIe 4.0 -connectors: 2 x M.2 - RAID 0 / RAID 1 |
| Interfaces | 1 x HDMI 1 x VGA 1 x LAN (2.5Gigabit Ethernet) 2 x USB 2.0 4 x USB 3.2 Gen 1 1 x microphone - mini-jack 1 x audio line-in - mini-jack 1 x audio line-out - mini-jack |
| Internal Interfaces | 1 x USB-C 3.2 Gen 1 - header 2 x USB 3.2 Gen 1 - header 4 x USB 2.0 - header 1 x audio - header 1 x serial - header 1 x SPI - header |
| Power Connectors | 24-pin main power connector, 8-pin ATX12V connector |
Features
| BIOS Type | AMI |
|---|---|
| BIOS Features | MSI ClickBIOS |
| Hardware Features | 7+2+1 Phase Power Design, Frozr AI Cooling, MSI AI Engine, MSI Companion, MSI LAN Manager, EZ PCie Clip II, EZ M.2 Clip II, EZ Debug LED, MSI Core Boost, MSI Audio Boost, MSI Memory Boost, ESD Protection, 6 Layer PCB, 2oz Copper PCB, Surface Mount Technology (SMT), transient voltage suppressors, MSI Stainless Steel Back I/O, pre-mounted I/O shield, CUDIMM support, chipset heatsink, MSI Mystic Light |
Miscellaneous
| Included Accessories | 2 x EZ M.2 clip II, EZ M.2 clip II remover |
|---|---|
| Cables Included | 1 x Serial ATA cable |
| Width | 24.384 cm |
| Depth | 22.6 cm |
Product features
Reliable connectivity
The motherboard provides multiple USB ports including four USB 3.2 Gen 1 ports and two USB 2.0 ports, ensuring ample connectivity options for peripherals and storage devices.High performance audio
Powered by the Realtek ALC897 codec, this motherboard delivers high definition audio capabilities with 8-channel output for an enhanced audio experience.Efficient power design
With a 7+2+1 phase power design, the board ensures stable power delivery to processors, enhancing performance during intensive tasks.Advanced cooling solutions
Equipped with MSI's Frozr AI Cooling technology and chipset heatsink, the motherboard maintains optimal temperatures to ensure system stability even under load.Easy installation features
Includes pre-mounted I/O shield and EZ M.2 Clip II, making installation simple and efficient for builders at any skill level.Key selling points
- Supports AMD Ryzen processors from the 7000 to 9000 series
- Dual-channel DDR5 SDRAM architecture with speeds up to 8000 MT/s (O.C.)
- Rich connectivity options including multiple USB ports and 2.5 Gigabit Ethernet
- Advanced audio capabilities with high definition 8-channel audio output
- Robust hardware features including ESD protection and customizable Mystic Light
References
MPN: PRO B840M-B
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