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Main image of MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

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Alt view image 3 of 7 - MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Alt view image 4 of 7 - MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Alt view image 5 of 7 - MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Alt view image 6 of 7 - MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Alt view image 7 of 7 - MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

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MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Item #: 9SIVF24M1X9637
Mfr. Part #: MAG X870 TOMAHAWK WIFI+R9 9900X3D
UNSPSC: 43201513

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Motherboard & CPU Combo
Motherboard:MAG X870 TOMAHAWK WIFI
Lightning USB 40G: Featuring a built-in USB 4 port, it offers a lightning-fast 40Gbps transmission speed.
EZ PCIe Release: A simple press of a button to effortlessly lock or unlock the PCIe slot, simplifying the installation and removal of the graphics card.
Extended Heatsink Design: MSI extended PWM heatsink, and enhanced circuit design ensures even high-end processors to run in full speed.
Lightning Gen 5: The latest PCIe 5.0 solution with up to 128GB/s bandwidth for maximum transfer speed.
Quadruple M.2 Connectors: Onboard quadruple M.2 connectors for the maximum storage performance.
5G Network solution: Featuring premium 5G LAN to deliver better network experience.
Wi-Fi 7:The latest wireless solution with a new 320MHz channel, achieving a maximum transmission speed of 5.8Gbps.
DDR5 Memory:A huge step of DDR performance enhancement with the latest DDR5 memory and MSI Memory Boost technology.
AMD Ryzen 9 9900X3D CPU
TSMC 4nm FinFET Granite Ridge (Zen 5) 120W
128MB L3 Cache
12MB L2 Cache
AMD Radeon Graphics

Overview

Specs

Reviews

Motherboard & CPU Combo

Motherboard:MAG X870 TOMAHAWK WIFI

Lightning USB 40G: Featuring a built-in USB 4 port, it offers a lightning-fast 40Gbps transmission speed.

EZ PCIe Release: A simple press of a button to effortlessly lock or unlock the PCIe slot, simplifying the installation and removal of the graphics card.

Extended Heatsink Design: MSI extended PWM heatsink, and enhanced circuit design ensures even high-end processors to run in full speed.

Lightning Gen 5: The latest PCIe 5.0 solution with up to 128GB/s bandwidth for maximum transfer speed.

Quadruple M.2 Connectors: Onboard quadruple M.2 connectors for the maximum storage performance.

5G Network solution: Featuring premium 5G LAN to deliver better network experience.

Wi-Fi 7:The latest wireless solution with a new 320MHz channel, achieving a maximum transmission speed of 5.8Gbps.

DDR5 Memory:A huge step of DDR performance enhancement with the latest DDR5 memory and MSI Memory Boost technology.

AMD Ryzen 9 9900X3D CPU

TSMC 4nm FinFET Granite Ridge (Zen 5) 120W

128MB L3 Cache

12MB L2 Cache

AMD Radeon Graphics

Model
Brand	MSI
Model	MAG X870 TOMAHAWK WIFI+R9 9900X3D

Supported CPU
CPU Socket Type	AM5

Chipsets
Chipset	AMD X870

Memory
Number of Memory Slots	4x288pin (DDR5)
Maximum Memory Supported	256GB
Channel Supported	Dual Channel
ECC Supported	Non-ECC
Buffer Supported	Un-buffered

Expansion Slots
PCI Express 5.0 x16	PCI_E1 slot (From CPU) Supports up to PCIe 5.0 x16
PCI Express x4	PCI_E3 slot (From Chipset X870) Supports up to PCIe 4.0 x4
PCI Express x1	PCI_E2 slot (From Chipset X870) Supports up to PCIe 3.0 x1

Storage Devices
Serial ATA (SATA)	4 x SATA 6Gb/s
M.2	M2_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 RAID	Supports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices

Onboard Audio
Audio Chipset	Realtek ALC4080
Audio Channels	7.1 Channels

Onboard LAN
LAN Chipset	Realtek 8126-VB
Max LAN Speed	5Gbps
Wireless LAN	Wi-Fi 802.11 be
Bluetooth	Bluetooth 5.4

Rear Panel Ports
Back I/O Ports	1 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

Internal I/O Connectors
Onboard USB	AMD 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 Connectors	Fan 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

Physical Spec
Form Factor	ATX
LED Lighting	1 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 Pin	1 x 24-pin Power Connector (ATX_PWR) 2 x 8-pin Power Connector (CPU_PWR) 1 x 8-pin Power Connector (PCIE_PWR)

Software Feature
BIOS Feature	1x 256 Mb flash UEFI AMI BIOS ACPI 6.4, SMBIOS 3.7 Multi-language
Software	Drivers MSI Center Acrobat Adobe Creative Cloud AIDA64 Extreme-MSI Edition CPU-Z MSI GAMING MSI App Player (BlueStacks) Norton 360

Features
Features	MSI 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 - Memory Boost - Server Grade PCB - 2oz Copper thickened PCB DIY Friendly - EZ M.2 Sheild Frozr II - EZ M.2 Clip II - EZ PCIe Release - Flash BIOS Button - Clear CMOS Button - Pre-installed I/O Shield - EZ Antenna - EZ Front Panel Cable - EZ Conn-Design - PCI-E STEEL ARMOR II - EZ Digi-Debug LED - EZ LED Control Audio - Audio Boost 5 RGB Support - Mystic Light - Mystic Light Extension (RGB) - Mystic Light Extension (ARGB V2) - Ambient Devices Support BIOS - Click BIOS X - AI Boost - Performance Preset

Additional Information
First Listed on Newegg	July 21, 2026

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MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

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Item#: 9SIVF24M1X9637

Meet Your Seller

MSI MAG X870 TOMAHAWK WIFI Motherboard & AMD Ryzen 9 9900X3D CPU Combo, AM5 - 80A SPS VRM, DDR5 Memory Boost 8400+MT/s (OC), PCIe 5.0 x16 & 4.0 x16, M.2 Gen5, Wi-Fi 7, 5G LAN

Learn more about the MSI MAG X870 TOMAHAWK WIFI+R9 9900X3D

Customer Reviews of the MSI MAG X870 TOMAHAWK WIFI+R9 9900X3D

Warranty & Returns

Warranty, Returns, And Additional Information

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Return Policies

Manufacturer Contact Info