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ASUS ROG STRIX X870-I Mini-ITX motherboard with Ryzen 9 9900X CPU installed, black heatsinks and integrated I/O cover

ASUS

ASUS ROG STRIX X870-I GAMING WIFI + Ryzen 9 9900X combo

SKU CH-2FGP-DA7ST

A Mini-ITX motherboard and 12-core Ryzen 9 9900X CPU combo with DDR5 support to 96 GB, PCIe 5.0 M.2, WiFi 7 and a 10+2+1 110 A power stage for compact high-performance builds

  • 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

CPU +R9 9900X

  • Ready for AI workloads with AM5 socket supporting Ryzen 7000, 8000, 9000 series
  • 12 cores and 24 threads on Zen 5 architecture reach 5.6 GHz max boost
  • 10+2+1 power stages rated 110A each with ProCool II connectors for multi-core stability
  • DDR5 memory up to 96 GB across four 288-pin slots with AEMP support
  • WiFi 7 2x2 on 2.4, 5, 6 GHz bands with 320 MHz bandwidth up to 6.5 Gbps

Compact AM5 combo for small-form-factor builders

This bundle pairs the ROG STRIX X870-I GAMING WIFI motherboard with the Ryzen 9 9900X processor. The board uses the AMD X870 chipset on a Mini ITX layout, while the CPU delivers 12 cores and 24 threads based on the Zen 5 architecture. It targets enthusiasts who want high core counts in a compact chassis.

AI-driven tuning and high-speed memory

ASUS AI Overclocking, AI Cooling II, AI Networking and AEMP firmware features adjust frequencies, fan curves and memory timings automatically. The board supports DDR5 up to 8400 MT/s when overclocked with Ryzen 9000 series processors across its two DIMM slots. These tools reduce manual configuration time for advanced AI workloads.

Robust 110 A power stages and dual M.2 cooling

A 10+2+1 power design rated at 110 A per stage uses ProCool II connectors, alloy chokes and durable capacitors. Massive heatsinks with an integrated I/O cover and high-conductivity thermal pads cover both the PCIe 5.0 M.2 slot and the PCIe 4.0 M.2 slot. An L-shaped backplate adds structural rigidity for daily transport.

How it compares

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

Price $991.99
Pricier than about 88% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model nameROG STRIX X870-I GAMING WIFI+R9 9900X
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

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Questions about this item

Will the 10+2+1 power stage rated for 110A per stage need component replacement under continuous load?

The power stage uses high-quality alloy chokes and durable capacitors designed for multi-core processors; no user-serviceable parts are expected to need replacement under normal operation

What thermal limit appears first when the Ryzen 9 9900X runs all 12 cores at 5.6 GHz boost?

The massive heatsinks with integrated I/O cover, high-conductivity thermal pads and L-shaped backplate are engineered to handle the 110A per stage power delivery before thermal throttling engages

How loud and hot does the board get when the Wi-Fi 7 2x2 320MHz radio and both M.2 slots run 24/7?

AI Cooling II manages fan headers dynamically while the integrated heatsink and backplate dissipate heat from the Wi-Fi 7 module and dual M.2 drives to keep noise and temperature in check

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