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MSI MAG B850 motherboard with Ryzen 9 9900X CPU in AM5 socket

MSI

MSI MAG B850 GAMING PLUS MAX WIFI AMD motherboard & Ryzen 9 9900X CPU combo

SKU CH-KG6V-VMNT9

AM5 motherboard and 12-core Ryzen 9 9900X CPU combo with DDR5 memory support up to 8200 MT/s, PCIe 5.0 M.2, Wi-Fi 7 and 5G LAN

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • ECC SupportedNon-ECC
  • Future-proof platform with 64 MB BIOS for next-level CPU upgrades
  • 12 cores and 24 threads on Ryzen Zen 5 architecture for heavy multitasking
  • DDR5 memory boost up to 8200 MT/s OC for high-speed responsiveness
  • PCIe 5.0 M.2 and x16 slots deliver 128 GB/s bandwidth for fast storage and graphics
  • Wi-Fi 7 with 160 MHz channel plus 5 Gbps LAN for low-latency networking

Combo AM5 12-core CPU & B850 board

This bundle pairs the MSI MAG B850 GAMING PLUS MAX WIFI motherboard with the AMD Ryzen 9 9900X processor. The board supports DDR5 memory up to 8200+ MT/s when overclocked across four slots. It provides PCIe 5.0 x4 M.2 storage, 5G LAN, and Wi-Fi 7 connectivity. The CPU delivers 12 cores and 24 threads with a 5.6 GHz maximum boost clock.

Gamers and creators needing high single-thread speed

The 12-core Zen 5 CPU suits gaming, streaming, and content creation workloads that benefit from high clock rates. Builders wanting more than 256 GB memory capacity or additional PCIe lanes for multiple add-in cards should consider a different platform. The B850 chipset provides one PCIe 4.0 x16 and one PCIe 3.0 x16 slot for expansion.

8200+ MT/s DDR5 overclock ceiling

The motherboard's Memory Boost design enables DDR5 operation up to 8200+ MT/s when overclocked, which defines the platform's peak memory bandwidth. This figure determines whether the board matches your performance targets for latency-sensitive applications. The CPU's native DDR5-5600 support sets the baseline without manual tuning.

Points forts

  • Future-proof platform with 64 MB BIOS for next-level CPU upgrades
  • 12 cores and 24 threads on Ryzen Zen 5 architecture for heavy multitasking
  • DDR5 memory boost up to 8200 MT/s OC for high-speed responsiveness
  • PCIe 5.0 M.2 and x16 slots deliver 128 GB/s bandwidth for fast storage and graphics
  • Wi-Fi 7 with 160 MHz channel plus 5 Gbps LAN for low-latency networking

Caractéristiques

BrandMSI
ModelMAG B850 GAMING PLUS MAX WIFI+R9 9900X
CPU Socket TypeAM5
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedNon-ECC
Buffer SupportedUn-buffered
PCI Express 4.0 x161 x PCI Express 4.0 x16
PCI Express 3.0 x161 x PCI Express 3.0 x16
M.23 x M.2 (Support PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2)
Onboard Video ChipsetDepends on installed processor
Audio ChipsetRealtek ALC897
Audio Channels7.1 Channels
LAN ChipsetRealtek 8126
Max LAN Speed5Gbps
BluetoothYes
Back I/O Ports4 x USB 2.0
1 x USB 5Gbps Type-A
1 x USB 10Gbps Type-A
2 x USB 10Gbps Type-C
1 x DisplayPort
COM1
DisplayPort1 x DisplayPort
Onboard USB4 x USB 5Gbps + 4 x USB 2.0 + 1 x USB Type-C header, with USB 5Gbps
Form FactorATX
LED LightingRGB
Dimensions (W x L)243.84mm x 304.8mm

Questions sur cet article

Do I need to buy DDR5 memory to use the Ryzen 9 9900X with this MAG B850 board?

Yes. The board has four 288-pin DDR5 slots supporting up to 256 GB in dual channel, and the CPU is rated for DDR5-5600 with overclocking up to 8200+ MT/s.

Will my existing PCIe 4.0 graphics card work in the primary x16 slot of this B850 motherboard?

The primary slot is wired for PCIe 4.0 x16, so a PCIe 4.0 GPU will run at its native speed; a second x16 slot is wired for PCIe 3.0 x16 if you need it.

How can I confirm the Wi-Fi 7 connection is delivering the advertised 2.9 Gbps after setup?

Open Windows Settings > Network & Internet > Wi-Fi, click the connected network, and verify the link speed shows values approaching 2.9 Gbps on a 160 MHz channel.

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