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A black ATX motherboard with back-connect layout and silver heatsinks, paired with a square Ryzen CPU in a plastic tray

MSI

MSI MAG X870E TOMAHAWK MAX WIFI PZ AMD motherboard & Ryzen 9 9900X CPU combo

SKU CH-0NNC-H1B0Q

Pairs an AMD Ryzen 9 9900X CPU with an X870E ATX motherboard featuring back-connect layout, four DDR5 slots up to 256 GB, dual PCIe 5.0 M.2, 5 Gbps LAN and Wi-Fi 7

  • CPU Socket TypeAM5
  • ChipsetAMD X870E
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • ECC SupportedNon-ECC

CPU +Ryzen 9 9900X

  • Cleaner front view and easier cable routing with back-connect design
  • 64MB BIOS ROM supports future CPU upgrades with broad compatibility
  • Built-in USB 4 port delivers 40Gbps data transfer speed
  • Four M.2 slots enable maximum storage performance
  • 5G LAN and Wi-Fi 7 provide high-speed wired and wireless networking

Combo purpose

This bundle pairs the MSI MAG X870E TOMAHAWK MAX WIFI PZ motherboard with an AMD Ryzen 9 9900X processor on the AM5 platform. It targets enthusiasts who want a ready-matched foundation for high-core-count workloads and gaming without separate compatibility checks.

Upgrade threshold

The X870E chipset and 64MB BIOS enable support for Ryzen 9000 series CPUs and PCIe 5.0 graphics and storage. The jump is worthwhile when moving from an older AM4 build or an entry-level AM5 board that lacks PCIe 5.0 M.2 slots and 5G LAN.

Build integration

The back-connect layout moves front-panel headers to the rear for cleaner cable routing inside standard ATX cases. Four DDR5 slots accept up to 256GB in dual-channel mode. Three M.2 sockets from the CPU and one from the chipset provide high-speed storage expansion, while a USB 40G port and Wi-Fi 7 handle fast external connectivity.

Points forts

  • Cleaner front view and easier cable routing with back-connect design
  • 64MB BIOS ROM supports future CPU upgrades with broad compatibility
  • Built-in USB 4 port delivers 40Gbps data transfer speed
  • Four M.2 slots enable maximum storage performance
  • 5G LAN and Wi-Fi 7 provide high-speed wired and wireless networking

Caractéristiques

BrandMSI
SeriesMAG X870E TOMAHAWK MAX WIFI PZ+R9 9900X
ModelMAG X870E TOMAHAWK MAX WIFI PZ+R9 9900X
CPU Socket TypeAM5
ChipsetAMD X870E
Number of Memory Slots4x288pin (DDR5)
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedNon-ECC
Buffer SupportedUn-buffered
Memory FeatureSupports CUDIMM, Clock Driver bypass mode only
PCI Express 5.0 x16PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU)
PCI_E1 slot
- Supports PCIe 5.0 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)
PCI Express x4PCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)
PCI Express x1PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Serial ATA (SATA)4 x SATA 6Gb/s
M.2M.2_1 Source (From CPU) supports up to PCIe 5.0 x4 , supports 22110/2280 devices
M.2_2 Source (From CPU) supports up to PCIe 5.0 x4 , supports 2280/2260 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_4 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_1 slot (From CPU)
- Supports up to PCIe 5.0 x4 (For Ryzen 9000/ 7000 Series processors)
- Supports up to PCIe 4.0 x4 (For Ryzen 8000 Series processors)
M.2_2 slot (From CPU)
- Supports up to PCIe 5.0 x4 (For Ryzen 9000/ 7000 Series processors)
- Supports up
SATA RAIDSupports RAID 0, RAID 1 and RAID 10 for SATA storage devices
Supports RAID 0, RAID 1, RAID 5 and RAID 10 for M.2 NVMe storage devices
*RAID 5 configuration is only supported by Ryzen 9000 series processors.
*RAID 10 for M.2 NVMe storage devices is only supported by Ryzen 9000/7000 series processors.
Audio ChipsetRealtek ALC4080 Codec
7.1-Channel USB High Performance Audio
Supports up to 32-bit/384kHz playback on front panel
Supports S/PDIF output
Audio Channels7.1 Channels
Max LAN Speed5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Onboard USB4 x USB 2.0 ports
4 x USB 5Gbps Type A ports
1 x USB 20Gbps Type C ports
Other Connectors1 x CPU Fan
1 x Combo Fan (Pump_Sys Fan)
6 x System Fan
1 x EZ Conn-header (JAF_2)
2 x Front Panel (JFP)
1 x Chassis Intrusion (JCI)
1 x Front Audio (JAUD)
3 x Addressable V2 RGB LED connector (JARGB_V2)
1 x RGB LED connector(JRGB)
1 x TPM pin header(Support TPM 2.0)
2 x Direct OC Jumper (JBCLK)
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x Power Connector(ATX_PWR)
2 x Power Connector(CPU_PWR)
1 x Power Connector(PCIE_PWR 8pin)

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Questions sur cet article

What case clearance does the back-connect design need for the rear I/O connectors?

The back-connect design moves all main connectors to the rear of the board, so the case must provide standard ATX rear cut-out space and enough depth behind the motherboard tray for cables to route cleanly.

Which step is most often missed when seating the Ryzen 9 9900X into the AM5 socket?

After placing the CPU in the socket, the lever must be lowered fully until it clicks under the retention tab; a partial latch leaves the contact pads unseated and prevents POST.

When will the 64 MB BIOS ROM need an update for future CPU support?

A larger 64 MB BIOS ROM allows the board to accept microcode for next-level AM5 processors; apply the latest MSI BIOS file before installing a newer Ryzen generation.

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