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Square Mini-ITX board in dark grey with integrated I/O shield, CPU socket cover on, thermal grease syringe alongside

ASUS

ASUS ROG STRIX B860-I Gaming WiFi Intel Motherboard & Ultra 9 285K CPU Combo

SKU CH-EPE8-1RASZ

A Mini-ITX LGA 1851 motherboard paired with an Intel Ultra 9 285K CPU and Shin-Etsu thermal grease, delivering 96 GB DDR5 memory support, WiFi7, 2.5 Gbps LAN.

  • CPU Socket TypeLGA 1851
  • ChipsetIntel B860
  • Number of Memory Slots2x288pin (DDR5)
  • Memory StandardUp to 9066+MT/s (OC)
  • Maximum Memory Supported96GB
  • Channel SupportedDual Channel

model ROG STRIX B860-I GAMING WIFI

+CPU +Ultra 9 285K

  • Ready for Intel Core Ultra Series 2 processors via LGA 1851 socket
  • 10+1+2+1 80A power stages with ProCool connectors and MicroFine alloy chokes
  • Dual DDR5 slots up to 9066 MT/s supporting 96GB maximum capacity
  • PCIe 5.0 x16 slot plus two M.2 slots (2280/2260/2242) with heatsink cooling
  • 5G LAN, WiFi7, Bluetooth 5.4 and Thunderbolt 4 on rear I/O

Combo contents

The bundle pairs an ASUS ROG STRIX B860-I GAMING WIFI motherboard with an Intel Core Ultra 9 285K processor and Shin-Etsu X-23-7868-2D thermal grease. The board uses the Intel B860 chipset and LGA 1851 socket in a Mini-ITX form factor. It targets builders who want a compact platform ready for AI workloads and high-speed memory.

Thermals and power

The motherboard employs a 10+1+2+1 stage VRM rated at 80 A per stage with ProCool connectors, MicroFine alloy chokes and metallic capacitors. Cooling relies on massive heatsinks, an integrated I/O cover, high-conductivity thermal pads and an L-shaped heatpipe. The CPU has a 125 W base power rating and no cooler is included in the box.

Sustained load behaviour

Under continuous load the VRM heatsink array and heatpipe spread heat across the I/O cover to maintain stable delivery to the 285K. Two M.2 slots are provided: one PCIe 5.0 x4 with a large heatsink and one PCIe 4.0 x4 for additional storage. DDR5 memory can reach 9066 MT/s (OC) in dual-channel mode up to 96 GB.

Points forts

  • Ready for Intel Core Ultra Series 2 processors via LGA 1851 socket
  • 10+1+2+1 80A power stages with ProCool connectors and MicroFine alloy chokes
  • Dual DDR5 slots up to 9066 MT/s supporting 96GB maximum capacity
  • PCIe 5.0 x16 slot plus two M.2 slots (2280/2260/2242) with heatsink cooling
  • 5G LAN, WiFi7, Bluetooth 5.4 and Thunderbolt 4 on rear I/O

Caractéristiques

BrandASUS
ModelROG STRIX B860-I GAMING WIFI+Ultra 9 285K
Part NumberROG STRIX B860-I GAMING WIFI+Ultra 9 285K
CPU Socket TypeLGA 1851
ChipsetIntel B860
Number of Memory Slots2x288pin (DDR5)
Memory StandardUp to 9066+MT/s (OC)
Maximum Memory Supported96GB
Channel SupportedDual Channel
Memory FeatureDual channel memory architecture
DIMM Fit
Supports Intel Extreme Memory Profile (XMP) memory module
ASUS Enhanced Memory Profile III (AEMPIII)
PCI Express 5.0 x16Intel Core Ultra Processors (Series 2)
1 x PCIe 5.0 x16 slot
Serial ATA (SATA)4 x SATA 6Gb/s
M.2Intel Core Ultra Processors (Series 2)
M.2_1 slot (Key M), type 2260/2280 (supports PCIe 5.0 x4 mode)
Intel B860 Chipset**
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
SATA RAIDIntel Rapid Storage Technology supports SATA RAID 0/1/5/10.
Audio ChipsetRealtek ALC1220P
Audio ChannelsRealtek ALC1220P 7.1 Surround Sound High Definition Audio CODEC*
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
- Supports up to 32-Bit/192 kHz playback*
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP
- Rear optical S/PDIF out port
- Premium audio capacitors
- Dedicated audio PCB layers
* Due to limitati
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports1 x Thunderbolt 4 port (1 x USB Type-C)
1 x USB 20Gbps port (1 x USB Type-C)
1 x USB 10Gbps ports (1 x Type-A)
3 x USB 5Gbps ports (3 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Wi-Fi module
1 x Intel 2.5Gb Ethernet port
2 x Audio jacks
1 x Optical S/PDIF out port
1 x Clear CMOS button
Onboard USB1 x USB 10Gbps connector (supports USB Type-C)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
1 x USB 2.0 header supports 2 additional USB 2.0 ports
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin AIO Pump header
1 x 4-pin Chassis Fan headers
Miscellaneous
2 x Addressable Gen2 headers
1 x Front Panel Audio header (F_AUDIO)
1 x 10-1 pin Front System Panel header
1 x Thermal Sensor header
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
SoftwareROG Exclusive Software
- ROG CPU-Z
- Dolby Atmos
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 4
- GameFirst
- Power Saving
AIDA64 Extreme (60 days free trial)
HWiNFO
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
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey
NPU Boost
Windows 11Windows 11 (22H2 & later)
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
FeaturesExtreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- M.2 Q-Latch
- 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
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- Clear CMOS button
- CPU Socket lever protector
- ProCool
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Addressable Gen2 headers
Package Contents1 x Intel Ultra 9 285K CPU
1 x Thermal grease: Shin-Etsu X-23-7868-2D
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x Cable ties package
2 x Screw packages for M.2 SSD
1 x Fan Bracket
1 x ROG key chain
1 x ROG Strix stickers
Documentation
1 x Quick start guide

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5 de plus dans cette gamme

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Questions sur cet article

How do I install the LGA 1851 CPU into the socket without bending pins?

Align the triangle marker on the Intel Ultra 9 285K with the socket corner, lower it gently without force, then secure the retention lever; the included Shin-Etsu X-23-7868-2D grease goes on the heatspreader after the CPU is seated.

What component will need replacement first during long-term use?

The Shin-Etsu X-23-7868-2D thermal compound between the Ultra 9 285K and your cooler should be reapplied every few years as it dries out and loses conductivity.

Which limit appears first when the VRM runs under sustained 125 W loads?

The 10+1+2+1 phase VRM with 80 A power stages is rated for the Ultra 9 285K’s 125 W base power, so VRM temperature becomes the limiting factor before current capacity does.

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