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MSI PRO B840M-B motherboard AMD B840 Socket AM5 micro ATX
BUSINESS ELEGANCE
The PRO Series is tailored to professionals from all walks of life. The lineup features impressive performance and high quality, while aiming to provide users incredible experience. Users who care about productivity and efficiency can definitely count on the MSI PRO Series to assist you with multitasking and increasing efficiency.
MSI motherboards are designed with advanced hardware and technology, well-supporting the demanding computing usage of gaming and AI. Moreover, we also introduce AI to MSI Center and BIOS, making everything more effortless than before.
DIRECT 7+2+1 POWER DESIGN
Unleash and sustain the maximum performance with a VRM design built with a total of 7+2+1 digital power phases. With an 8-pin power connector, PRO B840M-B is ready for the challenge of heavy-loading tasks.
Chipset Heatsink
The chipset heatsink is designed to reduce dust and noise and capable of maintaining high efficiency of heat dissipation.
HIGH-BANDWIDTH AND LOW-LATENCY NETWORK
MSI’s premium network solution provides incredible data transfer speed for demanding users.
| Processor | |
|---|---|
| Supported processor sockets | Socket AM5 |
| Compatible processor series | AMD Ryzen 7000 Series, AMD Ryzen 8000 Series, AMD Ryzen 9000 Series |
| Processor socket | Socket AM5 |
| Processor manufacturer | AMD |
| Memory | |
|---|---|
| Maximum internal memory | 128 GB |
| Supported memory clock speed (max) | 8000 MHz |
| Supported memory clock speeds | 4800,5600,8000 MHz |
| ECC сompatibility | Non-ECC |
| Memory channels | Dual-channel |
| Memory slots type | DIMM |
| Number of memory slots | 2 |
| Supported memory types | DDR5-SDRAM |
| Storage controllers | |
|---|---|
| RAID levels | 0, 1, 10 |
| RAID support | Yes |
| Number of HDDs supported | 4 |
| Number of storage drives supported | 6 |
| Supported storage drive interfaces | M.2, Micro SATA III |
| Supported storage drive types | HDD & SSD |
| Graphics | |
|---|---|
| On-board graphics card | No |
| Internal I/O | |
|---|---|
| Number of RGB LED pin headers | 3 |
| RGB LED pin header | Yes |
| Number of water pump connectors | 1 |
| Number of CPU fan connectors | 1 |
| Number of chassis fan connectors | 5 |
| Total number of SATA connectors | 4 |
| Number of SATA III connectors | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) connectors | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) connectors | 2 |
| USB 2.0 connectors | 4 |
| Rear panel I/O ports | |
|---|---|
| HDMI version | 2.1 |
| HDMI ports quantity | 1 |
| Ethernet LAN (RJ-45) ports | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 4 |
| USB 2.0 ports quantity | 2 |
| Network | |
|---|---|
| Wi-Fi | No |
| LAN controller | Realtek RTL8125D |
| Ethernet interface type | 2.5 Gigabit Ethernet |
| Ethernet LAN | Yes |
| Features | |
|---|---|
| Windows operating systems supported | Windows 11 x64 |
| Product colour | Black |
| Audio output channels | 7.1 channels |
| Audio chip | Realtek ALC897 |
| Motherboard chipset | AMD B840 |
| Motherboard chipset family | AMD |
| Motherboard form factor | micro ATX |
| Component for | PC |
| Expansion slots | |
|---|---|
| 2nd M.2 highest PCI Express generation | 4.0 |
| 2nd M.2 largest key size | 2280 |
| 1st M.2 highest PCI Express generation | 4.0 |
| 1st M.2 largest key size | 2280 |
| Number of M.2 (M) slots | 2 |
| PCI Express x16 slots | 2 |
| BIOS | |
|---|---|
| System Management BIOS (SMBIOS) version | 3.7 |
| ACPI version | 6.5 |
| BIOS memory size | 256 Mbit |
| BIOS type | UEFI AMI |
| Weight & dimensions | |
|---|---|
| Depth | 243.8 mm |
| Width | 226 mm |
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Grade
-
Part Number
Brand New – This product is Brand New and in it’s original
packaging.
New - Open Box - This product is unused but the box has been opened.
New – No Box – This product is unused but doesn’t come with
the original box/packaging.
Refurbished – This product has been refurbished by ourselves
or by the manufacturer.
Excellent Used – This item is used, tested and fully working
but in like new condition. It may come with it’s original packaging or not,
please check the product description.
Good Used – This item is used, tested and fully working but
will show signs of cosmetic wear and tear. It may come with it’s original packaging
or not, please check the product description.
Parts – This item is sold just for parts, meaning it is
unworking or unable to serve it’s purpose. It may come with it’s original packaging
or not, please check the product description.
Brand New Products: All our Brand New products come with Manufaturer warranty. These can vary in length and it's important to check with the manufaturer of the product what warranty they provide and what is covered.
Used Products: All our used products come with 1 years warranty provided by us and some products may have manufaturer warranty.
Refurbished Products: With our refurbished products, we offer a free 3-month warranty which covers all software and hardware issues, that have not been influenced by the customer. There is also Manufactured Refurbished products which they will specify how long their warranty is.
Custom Gaming PCs: All our Custom PCs by default come with 3 years warranty. This includes parts and labour. You can also upgrade to 5 years warranty. Our warranty includes all hardware issues relating to the machine. If there is any faults, we will attempt to solve this remotely and if needed get the PC collected and back to base for repair.
Read more - Warranty Information
