MSI Pro B840-S EVO WIFI6E ATX AM5 AMD B840

Chipset    AMD B840
CPU    Supports AMD Ryzen™ 9000/ 8000/ 7000 Series Desktop Processors
Socket AM5
Memory    4x DDR5 UDIMM, Maximum Memory Capacity 256GB
Memory Support DDR5 8000 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
Ryzen™ 9000 Series Processors max. overclocking frequency:
• 1DPC 1R Max speed up to 8000+ MT/s
• 1DPC 2R Max speed up to 6400+ MT/s
• 2DPC 1R Max speed up to 6400+ MT/s
• 2DPC 2R Max speed up to 5600+ MT/s

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.
• The DIMM slots on this motherboard only have single-sided latches.
• 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 or visit https://www.msi.com/support/.
Onboard Graphics    1x HDMI™
Support HDMITM 2.1, maximum resolution of 4K 60Hz*
*Available only on processors featuring integrated graphics. Graphics specifications may vary depending on the CPU installed.
Slot    2x 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 x4 (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 processors)
Audio    Realtek® ALC897
7.1-Channel High Definition Audio
Storage    3x M.2
M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_2 Source (From CPU) supports up to PCIe 4.0 x4 , supports 22110/2280/2260 devices
M.2_3 Source (From Chipset) supports up to PCIe 3.0 x4 , supports 2280/2260 devices
4x SATA 6G

M2_2 slot
• Supports up to PCIe 4.0 x4 (For Ryzen™ 9000/ 7000 Series processors)
• Supports up to PCIe 3.0 x4 (For Ryzen™ 8000 Series processors)
• Supports up to PCIe 3.0 x2 (For Ryzen™ 8500/ 8300 Series processors)

*Please refer to the manual for M.2 SSD heatsink restrictions.
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
USB    4x USB 2.0 (Rear)
4x USB 2.0 (Front)
2x USB 5Gbps Type A (Rear)
2x USB 5Gbps Type A (Front)
1x USB 5Gbps Type C (Front)
1x USB 10Gbps Type A (Rear)
1x USB 10Gbps Type C (Rear)
LAN    Realtek® 8125D 2.5G LAN
Internal IO    1x Power Connector(ATX_PWR)
1x Power Connector(CPU_PWR)
1x CPU Fan
1x Combo Fan (Pump_Sys Fan)
4x System Fan
2x Front Panel (JFP)
1x Chassis Intrusion (JCI)
1x Front Audio (JAUD)
1x Com Port (JCOM)
1x Tuning Controller connector(JDASH)
3x 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
WIRELESS LAN & BLUETOOTH    Wi-Fi 6E
The Wireless module is pre-installed in the M.2 (Key-E) slot
Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz/ 6GHz* (160MHz) up to 2.4Gbps
Supports 802.11 a/ b/ g/ n/ ac/ ax

Supports Bluetooth® 5.3**, FIPS, FISMA

* Wi-Fi 6E 6GHz may depend on every country’s regulations and will be ready in Windows 10 build 21H1 and Windows 11.
** The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor’s website for details.
LED FEATURE    4x EZ Debug LED
1x EZ Memory Detection LED
BACK PANEL PORTS    
Clear CMOS Button
USB 10Gbps Type-A
USB 2.0
2.5G LAN
Wi-Fi / Bluetooth
Audio connectors
Flash BIOS Button
HDMI™
USB 10Gbps Type-C
USB 5Gbps Type-A