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Compact mini-ITX motherboard with large heatsinks and installed Ryzen 7 9800X3D CPU

ASUS

ASUS AMD motherboard with Ryzen 7 9800X3D

SKU CH-TJQ9-9XXSY

Mini ITX AM5 motherboard paired with an 8‑core 3D V‑Cache CPU, DDR5 up to 8400 MT/s, PCIe 5.0 graphics and M.2, Wi‑Fi 7 and USB4

  • ChipsetAMD X870
  • Form factorMini ITX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 4400
  • Max supported RAM96 GB
  • ECC supportNon-ECC

Model ROG STRIX X870-I GAMING WIFI

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CPU + Ryzen 7 9800X3D

  • Ready for advanced AI workloads with X870 chipset and Ryzen 7 9800X3D
  • Robust 10+2+1 power solution rated 110A per stage for multi-core stability
  • DDR5 memory support up to 96GB with AEMP optimisation
  • WiFi 7 2x2 delivering up to 6.5Gbps on 320MHz bandwidth
  • PCIe 5.0 x16 slot and PCIe 5.0 M.2 for next-gen GPU and storage

Combo platform for Ryzen 7 9800X3D

This ASUS ROG STRIX X870-I GAMING WIFI bundle pairs the Mini ITX motherboard with an AMD Ryzen 7 9800X3D processor. The AM5 socket supports Ryzen 7000, 8000 and 9000 series CPUs. Four DDR5 slots accept up to 96GB of memory. The board targets gamers and creators who want a compact system with PCIe 5.0 graphics and storage support.

Installation notes for Mini ITX build

The board uses a 24-pin main power connector and an 8-pin CPU power connector. One 4-pin CPU fan header, one AIO pump header and one chassis fan header handle cooling. Two M.2 slots (one PCIe 5.0, one PCIe 4.0) and two SATA 6Gb/s ports provide storage options. Builders should verify case clearance for the integrated I/O cover and L-shaped backplate, and ensure the CPU cooler fits the Mini ITX layout.

Sustained load behaviour

A 10+2+1 power stage design rated at 110A per stage with ProCool II connectors delivers stable current to the 9800X3D during extended sessions. Massive heatsinks with high-conductivity thermal pads cover the VRM and M.2 areas. AI Cooling II adjusts fan speeds based on real-time temperatures. Wi-Fi 7 (802.11be) with 320MHz bandwidth and 2.5Gbps LAN maintain network throughput under heavy traffic.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $1,111.99
Pricier than about 90% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model nameROG STRIX X870-I GAMING WIFI+R7 9800 × 3D
Processor
ChipsetAMD X870
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryDDR5 4400
Max supported RAM96 GB
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports2 x SATA 6Gb/s
M.2 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors*
M.2_1 slot (Key M), type 2280(supports PCIe 5.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors*
M.2_1 slot (Key M), type 2280(supports PCIe 4.0 x4 mode)
AMD X870 Chipset
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4)
*** Install ROG FPS Card to support 2 x SATA 6Gb/s ports.
SATA and RAID support* AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1
Connectivity
Maximum network speed2.5 Gbit/s
Bluetooth supportv5.4***
*** The Bluetooth version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.
Ports & slots
PCIe 5.0 x16 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot
PCIe 4.0 x16 slotsAMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
USB 3.0 portsUSB4
Onboard USB headersUSB
1 x USB 10 Gbit/s connector (supports USB Type-C® )
1 x USB 5 Gbit/s header support(s) 2
additional USB 5 Gbit/s ports
Size & build
Form factorMini ITX
Width and length6.7 in × 6.7 in
More details
BIOS256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

How can I confirm the Ryzen 7 9800X3D is running correctly after installing it on the ROG STRIX X870-I GAMING WIFI?

Enter the BIOS and verify the processor is detected as Ryzen 7 9800X3D on the AM5 socket. The POST screen should show the CPU model and memory running at DDR5 4400 or higher. AI Overclocking and AI Cooling II will initialise automatically.

What comes in the combo box and what must I purchase separately?

The package includes the ROG STRIX X870-I GAMING WIFI motherboard and the AMD Ryzen 7 9800X3D processor. You must buy DDR5 memory modules, an AM5-compatible CPU cooler, storage drives, a power supply and a case separately.

Which DDR5 speed should I choose for the 96 GB maximum capacity on this X870 board?

The board supports up to 96 GB across two DIMM slots. For Ryzen 9000 series the rated overclock ceiling is 8400+ MT/s, for Ryzen 8000 series 8600+ MT/s, and for Ryzen 7000 series 8000+ MT/s. Select a kit that matches your target frequency and the 288-pin DDR5 form factor.

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