MSI B840 Gaming Plus WIFI ATX Motherboard
MPN B840-GAMING-PLUS-WIFI · Brand MSI · ATX
The MSI B840 Gaming Plus WIFI is an ATX motherboard on the AM5 socket with AMD B840 chipset, supporting Ryzen 9000/8000/7000 processors, DDR5 memory up to 8000+ MT/s, Wi-Fi 7, 2.5G LAN, and PCIe 4.0
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Overview
The MSI B840 Gaming Plus WIFI is a full-size ATX motherboard built on the AMD B840 chipset and the AM5 (LGA1718) socket, making it compatible with AMD Ryzen 9000, 8000, and 7000 series desktop processors. Designed for gamers and enthusiasts who demand reliable, high-performance computing, it pairs a robust power delivery system with modern connectivity options to handle demanding workloads and extended gaming sessions. On the memory front, the board supports DDR5 RAM in dual-channel configuration, with speeds reaching 8000+ MT/s via overclocking, and accommodates up to 256 GB of non-ECC, unbuffered DDR5 memory. AMD EXPO profiles are supported, and CUDIMM compatibility is available in clock-driver bypass mode, subject to CPU and BIOS version. The primary PCIe slot (PCI_E1) operates at PCIe 4.0 x16 from the CPU for Ryzen 9000 and 7000 series processors, dropping to x8 for Ryzen 8700/8600/8400 and x4 for Ryzen 8500/8300 variants. Four additional slots draw from the chipset at PCIe 3.0 speeds, providing flexibility for expansion cards. For storage, the board includes Lightning Gen 4 x4 M.2 connectivity backed by MSI's EZ M.2 Shield Frozr II thermal solution, which uses EZ M.2 Clip II for tool-free installation. Networking is handled by full-speed Wi-Fi 7 alongside a 2.5G wired LAN port, and Bluetooth 5.4 is integrated. The back panel includes USB 10 Gbps Type-A and Type-C ports, USB 5 Gbps Type-A, USB 2.0, HDMI 2.1, a Flash BIOS button, and a Clear CMOS button for simplified setup and recovery. Thermal management is addressed through the Frozr Guard system: an extended VRM heatsink, 7 W/mK MOSFET thermal pads, additional choke thermal pads, and an enlarged chipset heatsink all work together to manage heat under sustained load. The 7+2+1 phase direct CPU power design with an 8-pin CPU power connector, Core Boost technology, and a 6-layer PCB with 2 oz thickened copper layers underpin stable power delivery. For audio, MSI's Isolated Analogy Structure separates the external metal framework of the audio connectors from the internal PCB layout to reduce interference and maintain clear output quality. RGB headers include two Addressable V2 RGB (JARGB_V2) connectors and one standard RGB (JRGB) connector. Key Verified Specifications: - Socket: AM5 (LGA1718) - Chipset: AMD B840 - Form Factor: ATX - CPU Support: AMD Ryzen 9000 / 8000 / 7000 series - Memory: DDR5 Dual Channel, up to 256 GB, up to 8000+ MT/s (OC) - Primary PCIe: PCIe 4.0 x16 (CPU, Ryzen 9000/7000) - M.2: Lightning Gen 4 x4 with EZ M.2 Shield Frozr II - Networking: Wi-Fi 7, 2.5G LAN, Bluetooth 5.4 - USB (rear): 10 Gbps Type-A, 10 Gbps Type-C, 5 Gbps Type-A, USB 2.0 - Display Output: HDMI 2.1 - VRM: 7+2+1 phase direct, 8-pin CPU power connector - Warranty: 3 Years
Datasheet
| Memory Type | DDR5 |
|---|---|
| Warranty | 3 Years |
| Form Factor | ATX |
| Chipset | B840 |
| Socket | AM5 |
| Platform | AMD |
| CPU Type | Ryzen 9000,Ryzen 8000,Ryzen 7000 |
| Max Memory | 256 GB |
| Memory Speed | up to 8000+ |
| Graphics Port | 1x HDMI |
| Memory Feature | Supports AMD POR Speed and JEDEC Speed Supports Memory Overclocking and AMD EXPOTM Supports Dual-Channel mode Supports Non-ECC, Un-buffered memory Supports CUDIMM, Clock Driver bypass mode only * CUDIMM support and POR boot frequency may vary by CPU series, with manual overclocking available after boot. Certain CPUs may fail to boot, but future BIOS updates will improve compatibility. • Memory compatibility and supported speeds can vary depending on the CPU and memory configuration. For detailed information, please refer to the Memory Compatibility List available on the product’s Support page MSI Site |
| Expansion Slots | 5x PCI-E x16 slot PCI_E1 Gen PCIe 4.0 supports up to x16 (From CPU) PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E3 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E4 Gen PCIe 3.0 supports up to x4 (From Chipset) PCI_E5 Gen PCIe 3.0 supports up to x1 (From Chipset) PCI_E1 slot • Supports PCIe 4.0 x16 (For Ryzen™ 9000/ 7000 Series processors) • Supports PCIe 4.0 x8 (For Ryzen™ 8700/ 8600/ 8400 Series processors) • Supports PCIe 4.0 x4 (For Ryzen™ 8500/ 8300 Series processor) |
| Channel Supported | Dual Channel |
| Wireless Networking | WiFi 7,Bluetooth 5.4 |
| Back Panel I/O Ports | Clear CMOS Button USB 10Gbps (Type-A) USB 2.0 2.5G LAN Wi-Fi / Bluetooth Audio connectors Flash BIOS Button HDMI™ 2.1 Port USB 10Gbps (Type-C) USB 5Gbps (Type-A) |
| Internal I/O Connector | 1x Power Connector(ATX_PWR) 1x Power Connector(CPU_PWR) 1x CPU Fan 1x Combo Fan (Pump_Sys Fan) 4x System Fan 1x EZ Conn-header (JAF_1) 2x Front Panel (JFP) 1x Chassis Intrusion (JCI) 1x Front Audio (JAUD) 1x Com Port (JCOM) 1x Tuning Controller connector(JDASH) 2x Addressable V2 RGB LED connector (JARGB_V2) 1x RGB LED connector(JRGB) 1x TPM pin header(Support TPM 2.0) 4x USB 2.0 ports 2x USB 5Gbps Type A ports 1x USB 5Gbps Type C ports |
