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Compact Mini-ITX motherboard with large black heatsinks, integrated I/O shield and CPU installed

ASUS

ASUS AMD motherboard

SKU CH-5AYF-QHDJJ

Mini ITX X870 motherboard with Ryzen 7 9850X3D CPU, 10+2+1 power, DDR5 up to 8600 MT/s, WiFi 7, PCIe 5.0 M.2 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 9850X3D

  • AM5 socket supports Ryzen 7000, 8000 and 9000 series processors
  • 10+2+1 power stages rated 110A each for stable multi-core performance
  • AI overclocking, cooling and networking simplify setup and boost speed
  • DDR5 memory up to 8400 MT/s with Ryzen 9000 series CPUs
  • WiFi 7 2×2 on 2.4, 5 and 6 GHz bands up to 6.5 Gbps

AM5 X870 Mini ITX Combo for Gaming

This bundle pairs the ROG STRIX X870-I GAMING WIFI motherboard with the AMD Ryzen 7 9850X3D processor. The board uses the AMD X870 chipset and AM5 socket supporting Ryzen 7000, 8000 and 9000 series CPUs. It targets builders who want a compact platform with high memory speeds and modern connectivity.

Upgrade from older AM5 mITX boards

Moving to X870 adds a PCIe 5.0 x16 slot and a PCIe 5.0 M.2 2280 slot driven by Ryzen 9000 and 7000 series processors. The 10+2+1 power stage design rated at 110A per stage with ProCool II connectors supports multi-core loads. The jump is worth it when you need faster storage lanes and stronger VRM headroom.

Sustained load behaviour with AI controls

AI Overclocking, AI Cooling II and AEMP manage frequencies, fan curves and DDR5 timings continuously. Massive heatsinks with an integrated I/O cover, high-conductivity pads and an L-shaped backplate dissipate heat during long sessions. The 2.5Gbps LAN and WiFi 7 2x2 320MHz link maintain 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 $1,368.99
Pricier than about 92% 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 9850 × 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

What case clearance does the ROG STRIX X870-I GAMING WIFI need for its massive heatsinks and integrated I/O cover?

The board uses massive heatsinks with an integrated I/O cover and an L-shaped backplate, so a Mini-ITX case with sufficient CPU cooler height and rear I/O depth clearance is required.

Which power cables must be connected to the 10+2+1 power solution before first boot?

Connect the 24-pin main power connector and the single 8-pin +12V CPU power connector; the ProCool II connectors seat firmly, so press until they click.

How are the M.2 slots cooled and when should the thermal pads be inspected?

Both M.2 slots (one PCIe 5.0, one PCIe 4.0) have substantial heatsinks with high-conductivity thermal pads; inspect pads during any major rebuild or if drive temperatures rise unexpectedly.

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