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Black ATX motherboard with silver heatsinks and Ryzen 9 9900X CPU in plastic clamshell

MSI

MSI MAG X870 TOMAHAWK WIFI AMD motherboard & Ryzen 9 9900X CPU combo

SKU CH-PESH-KV89M

A motherboard and 12-core Ryzen CPU combo with DDR5 memory support, PCIe 5.0 graphics slot, four M.2 connectors, 5G LAN and Wi-Fi 7 wireless

  • CPU Socket TypeAM5
  • ChipsetAMD X870
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • ECC SupportedNon-ECC

CPU +R9 9900X

  • 12-core Ryzen 9 9900X reaches 5.6 GHz max boost for heavy workloads
  • 80A SPS VRM with extended heatsink keeps high-end CPU running at full speed
  • DDR5 memory boost up to 8400 MT/s via four 288-pin slots for responsive multitasking
  • PCIe 5.0 x16 graphics slot plus dual M.2 2280 Gen5 drives deliver 128 GB/s bandwidth
  • Wi-Fi 7 320 MHz channel plus 5G LAN and 40 Gbps USB4 for fast connectivity

Combo platform and purpose

This bundle pairs an MSI MAG X870 TOMAHAWK WIFI motherboard with an AMD Ryzen 9 9900X processor for Socket AM5 builds. The CPU delivers 12 cores and 24 threads based on the Zen 5 architecture, reaching a 5.6 GHz maximum boost frequency with 64 MB of L3 cache. The board provides an 80A SPS VRM, DDR5 memory support up to 8400 MT/s when overclocked, and a 40 Gbps USB4 port for high-speed peripherals.

Builder profile and limits

The combination suits enthusiasts who need multi-threaded throughput for rendering, compilation or heavy multitasking and want Gen 5 storage and 5 Gbps wired networking from a single purchase. Users requiring ECC or buffered DIMMs should look elsewhere, as the board supports only non-ECC un-buffered DDR5 across four 288-pin slots with a 256 GB maximum capacity.

Sustained-load behaviour

An extended PWM heatsink and enhanced circuit design keep the 80A VRM stable during prolonged all-core workloads, allowing the processor to maintain high frequencies without thermal throttling. Four onboard M.2 connectors — two CPU-attached Gen 5 slots for 2280 or 2260 devices and two chipset-attached slots — provide continued storage bandwidth for long compile jobs or video ingest. Wi-Fi 7 with a 320 MHz channel and the Realtek 5 Gbps LAN controller sustain network throughput for extended transfers.

Points forts

  • 12-core Ryzen 9 9900X reaches 5.6 GHz max boost for heavy workloads
  • 80A SPS VRM with extended heatsink keeps high-end CPU running at full speed
  • DDR5 memory boost up to 8400 MT/s via four 288-pin slots for responsive multitasking
  • PCIe 5.0 x16 graphics slot plus dual M.2 2280 Gen5 drives deliver 128 GB/s bandwidth
  • Wi-Fi 7 320 MHz channel plus 5G LAN and 40 Gbps USB4 for fast connectivity

Caractéristiques

BrandMSI
ModelMAG X870 TOMAHAWK WIFI+R9 9900X
CPU Socket TypeAM5
ChipsetAMD X870
Number of Memory Slots4x288pin (DDR5)
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedNon-ECC
Buffer SupportedUn-buffered
PCI Express 5.0 x16PCI_E1 slot (From CPU) Supports up to PCIe 5.0 x16
PCI Express x4PCI_E3 slot (From Chipset X870) Supports up to PCIe 4.0 x4
PCI Express x1PCI_E2 slot (From Chipset X870) Supports up to PCIe 3.0 x1
Serial ATA (SATA)4 x SATA 6Gb/s
M.2M2_1 slot (From CPU)
- Supports up to PCIe 5.0 x4
- Supports 2280/110 storage devices
M2_2 slot (From CPU)
- Supports up to PCIe 5.0 x4
- Supports 2260/80 storage devices
M2_3 slot (From Chipset)
- Supports up to PCIe 4.0 x2
- Supports 2260/80 storage devices
M2_4 slot (From Chipset)
- Supports up to PCIe 4.0 x4
- Supports 2260/80 storage devices
* The M2_2 slot will be unavailable when using Ryzen 5 8500G processor.
** PCI_E3 slot will run at x2 speed when installing device in the M2_3 slot
SATA RAIDSupports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Audio ChipsetRealtek ALC4080
Audio Channels7.1 Channels
LAN ChipsetRealtek 8126-VB
Max LAN Speed5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports1 x Flash BIOS button
1 x Clear CMOS button
1 x HDMI port
1 x USB 10Gbps Type-A (From CPU)
1 x USB 10Gbps Type-A (From X870 chipset)
1 x USB 10Gbps Type-C (From X870 chipset)
2 x USB 40Gbps Type-C (From ASM4242)
3 x USB 5Gbps Type-A (From GL3523)
4 x USB 2.0 Type-A ports (From GL850)
1 x 5Gbps LAN (RJ45) port
2 x Wi-Fi Antenna connectors
2 x audio jacks
1 x Optical S/PDIF Out connector
Onboard USBAMD X870 Chipset
- 1 x USB 20Gbps Type-C front panel port with Power Delivery Supports up to 27W fast charging
- 2 x USB 5Gbps connectors Supports additional 4 USB 5Gbps ports
- 2 x USB 2.0 connectors Supports additional 4 USB 2.0 ports
Other ConnectorsFan Connectors
- 1x 4-pin CPU fan connector
- 6x 4-pin system fan connectors
- 1x 4-pin water-pump/ system fan connector
- 1x EZ Conn-Header V2 (JAF_2 with 11-Pin)
System Connectors
- 1x Front panel audio connector
- 2x System panel connectors
- 1x Chassis Intrusion connector
- 1x TPM module connector
Jumpers
- 1x Clear CMOS jumper
- 1x OC safe boot BIOS jumper
Form FactorATX
LED Lighting1 x 4-pin RGB LED connector
3 x 3-pin A-RAINBOW V2 (ARGB Gen2) LED connectors
4 x EZ Debug LED
1 x 2-Digit Debug Code LED
1 x EZ Conn-Header V2 (JAF_2 with 11-Pin)
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Power Connector (ATX_PWR)
2 x 8-pin Power Connector (CPU_PWR)
1 x 8-pin Power Connector (PCIE_PWR)
BIOS Feature1x 256 Mb flash
UEFI AMI BIOS
ACPI 6.4, SMBIOS 3.7
Multi-language
SoftwareDrivers
MSI Center
Acrobat
Adobe Creative Cloud
AIDA64 Extreme-MSI Edition
CPU-Z MSI GAMING
MSI App Player (BlueStacks)
Norton 360
FeaturesMSI Center Features
- MSI AI Engine
- Game Highlights
- Frozr AI Cooling
- Hardware Monitoring
- Live Update
- MSI Companion
- System Diagnosis
- Cooling Wizard
- LAN Manager
- Mystic Light
- Ambient Link
- True Color
- User Scenario
- Super Charger +
Thermal Features
- K7 MOSFET thermal pad / K5 Extra choke pad
- Extended Heatsink Design
- Fan headers (CPU + Combo+PUMP + SYSTEM)
- M.2 Shield Frozr
Performance
- Lightning Gen 5 PCI-E Slot / M.2
- Lightning Gen 4 PCI-E Slot / M.2
- Front USB Type-C
- USB with PD
- Supplemental PCIe Power Connector
- Core Boost
- Dual CPU Power
- Memor

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