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Compact mini-ITX motherboard with large heatsinks and installed Ryzen 9 9900X CPU

ASUS

ASUS ROG Strix B850-I Gaming WiFi AMD motherboard & Ryzen 9 9900X CPU Combo

SKU CH-94XH-69BG3

Mini-ITX AM5 board paired with a 12-core Ryzen 9 9900X, 10+2+1 70A power stages, dual PCIe 5.0 M.2 slots, WiFi 7, 2.5G LAN and 96GB DDR5 support

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots2x288pin (DDR5)
  • Maximum Memory Supported96GB
  • Channel SupportedDual Channel
  • ECC SupportedYes

Motherboard ROG STRIX B850-I GAMING WIFI

Struck-through versions exist but are not stocked here.

CPU + Ryzen 9 9900X

  • Ready for Ryzen 9000, 8000 and 7000 series with AM5 socket
  • 12 cores and 24 threads reach 5.6 GHz max boost on Zen 5 architecture
  • 10+2+1 power stages rated to 70A with ProCool connectors for stable delivery
  • Two PCIe 5.0 M.2 slots, one heatsinked, for fast storage expansion
  • WiFi 7 and 2.5 Gbps LAN with Bluetooth 5.4 for high-speed networking

Compact AM5 platform

This bundle pairs the ROG Strix B850-I Gaming WiFi motherboard with the Ryzen 9 9900X processor for a Mini-ITX build. The board uses the AMD B850 chipset and an AM5 socket that supports Ryzen 9000, 8000 and 7000 series CPUs. Two DDR5 slots accept up to 96 GB of memory in dual-channel mode with ECC support. It targets enthusiasts who need high core counts in a small chassis.

Sustained 70 A power delivery

The 10+2+1 stage VRM is rated for up to 70 A per stage and uses ProCool power connectors to handle continuous current. Massive heatsinks with an integrated I/O cover and high-conductivity thermal pads dissipate heat during long workloads. AI Overclocking and AI Networking II adapt voltages and traffic in real time to keep performance stable. AEMP and EXPO profiles simplify memory tuning for extended sessions.

12-core Zen 5 CPU included

The Ryzen 9 9900X brings 12 cores and 24 threads based on the Zen 5 architecture with a 5.6 GHz maximum boost clock and 64 MB of cache. It is unlocked for overclocking and plugs directly into the AM5 socket. This processor determines the compute ceiling for rendering, compilation and multi-tasking workloads. The combination delivers a complete high-performance foundation in a compact form factor.

Highlights

  • Ready for Ryzen 9000, 8000 and 7000 series with AM5 socket
  • 12 cores and 24 threads reach 5.6 GHz max boost on Zen 5 architecture
  • 10+2+1 power stages rated to 70A with ProCool connectors for stable delivery
  • Two PCIe 5.0 M.2 slots, one heatsinked, for fast storage expansion
  • WiFi 7 and 2.5 Gbps LAN with Bluetooth 5.4 for high-speed networking

Specifications

BrandASUS
ModelROG STRIX B850-I GAMING WIFI+R9 9900X
CPU Socket TypeAM5
ChipsetAMD B850
Number of Memory Slots2x288pin (DDR5)
Maximum Memory Supported96GB
Channel SupportedDual Channel
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureDual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO)
ASUS Enhanced Memory Profile (AEMP)
PCI Express 5.0 x16AMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot(s)
PCI Express 4.0 x16AMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot(s)
Serial ATA (SATA)2 x SATA 6Gb/s
M.2AMD Ryzen 9000 & 7000 Series Desktop Processors*
M.2_1 slot (Key M), type02242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors*
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
SATA RAIDAMD RAIDXpert2 Technology supports both PCIe RAID 0/1/10 and SATA RAID 0/1
Audio ChipsetRealtek ALC4080
Audio ChannelsROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel MIC Jack-retasking
- High quality 120 dB SNR stereo playback output and 110 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Rear optical S/PDIF out port
- Premium audio capacitors
- Unique de-pop circuit
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports1 x USB 20Gbps port(s)
5 x USB 10Gbps port(s) (4 x Type-A + 1 x USB Type-C with DP Alt mode)
2 x USB 2.0 port(s) (2 x Type-A)
1 x HDMI port
1 x Wi-Fi module
1 x Intel 2.5Gb Ethernet port
3 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x Clear CMOS button
1 x FlexKey button
Onboard USB1 x USB 10Gbps connector (support(s) USB Type-C)
1 x USB 5Gbps header(s) support(s) 2 additional USB 5Gbps ports
1 x USB 2.0 header(s) support(s) 4 additional USB 2.0 ports
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header(s)
1 x 4-pin AIO Pump header(s)
1 x 4-pin Chassis Fan header(s)
1 x Extra Flow Fan header(s)
Miscellaneous
2 x Addressable Gen 2 header(s)
1 x CPU Over voltage jumper
1 x Front Panel Audio header (F_AUDIO)
1 x 10-1 pin Front System Panel header
1 x Thermal Sensor header
Form FactorMini ITX
Dimensions (W x L)6.7" x 6.7"
Power Pin1 x 24-pin Main Power connector
1 x 8-pin +12V CPU Power connector
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS // UEFI AMI BIOS(text-based)
SoftwareROG Exclusive Software
- ROG CPU-Z
- Dolby Atmos
ASUS Exclusive Software
Armoury Crate
- AIDA64 Extreme (60 days free trial)
- Aura Creator
- Aura Sync
- GameFirst
- HWiNFO
- Power Saving
ASUS AI Advisor
ASUS DriverHub
ASUS GlideX
TurboV Core
Adobe Creative Cloud (Free Trial)
Norton 360 for Gamers (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
AI Overclocking Guide
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey
Windows 11Windows 11, Windows 10 64-bit
Windows 11 (22H2 later)
FeaturesExtreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- M.2 Q-Latch
- M.2 Q-Slide
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- Clear CMOS button
- ProCool
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Addressable Gen 2 header(s)
Package Contents1 x AMD Ryzen 9 9900X CPU
Cables
1 x Panel cable
1 x ROG USB2.0 splitter cable
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x Cable ties package
1 x M.2 backplate Q-Latch package(s)
1 x M.2 Q-Slide package
1 x ROG key chain
1 x M.2 backplate rubber package(s)
1 x Screw package(s) for M.2 SSD
Documentation
1 x Quick start guide

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