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ATX motherboard with silver heatsinks, black PCB, mounted CPU cooler, thermal grease syringe

ASUS

ASUS PRIME B860-PLUS WIFI + Intel Ultra 9 285K Intel motherboard combo

SKU CH-1EXF-H7F08

An Intel Core Ultra 9 285K and B860 ATX motherboard bundle with DDR5 up to 8200 MT/s, PCIe 5.0 M.2, WiFi 6E and 2.5 Gb Ethernet

  • CPU Socket TypeLGA 1851
  • ChipsetIntel B860
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to 8200+ MT/s (OC)
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel

model PRIME B860-PLUS WIFI

+CPU +Ultra 9 285K

  • Ready for Intel Core Ultra Series 2 processors with LGA 1851 socket
  • Robust 8+1+1+1 80A DrMOS power stages deliver stable CPU power
  • PCIe 5.0 M.2 slot with heatsink enables fast storage
  • WiFi 6E and 2.5Gb Ethernet provide high-speed networking
  • 192GB DDR5 capacity up to 8200 MT/s supports heavy workloads

Combo Contents

This bundle pairs an ASUS PRIME B860-PLUS 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 on an ATX form factor with an LGA 1851 socket. The CPU is a 125W Arrow Lake part built on TSMC N3B with 36MB L3 and 40MB L2 cache. Integrated Intel Graphics are included on the processor.

Memory And Expansion Limits

Four 288-pin DDR5 slots support up to 192GB in dual-channel mode at speeds up to 8200+ MT/s when overclocked via XMP or ASUS Enhanced Memory Profile II. Expansion provides one PCIe 5.0 x16 slot from the CPU and one PCIe 4.0 x16 slot running at x4 plus three x16 slots running at x1 from the chipset. Storage includes one M.2 slot for PCIe 5.0 x4 drives in 2242/2260/2280 sizes and a second M.2 slot for PCIe 4.0 x4 drives in 2242/2260/2280/22110 sizes, plus four SATA 6Gb/s ports with RAID 0/1/5/10 support.

Installation Notes

The pre-mounted I/O shield, Q-DIMM latches, Q-LED diagnostics, Q-Slot release and Q-Dashboard visual guide simplify assembly for DIY builders. A single M.2 heatsink covers the primary slot; the secondary slot runs without dedicated cooling. The 8+1+1+1 80A DrMOS power stages use an 8-pin ProCool connector, alloy chokes and durable capacitors. Hybrid fan headers and Fan Xpert 2+ manage thermals, while WiFi 6E, Bluetooth 5.3, 2.5Gb Ethernet, rear USB 20Gbps Type-C, front USB 5Gbps Type-C, HDMI and DisplayPort handle connectivity.

Highlights

  • Ready for Intel Core Ultra Series 2 processors with LGA 1851 socket
  • Robust 8+1+1+1 80A DrMOS power stages deliver stable CPU power
  • PCIe 5.0 M.2 slot with heatsink enables fast storage
  • WiFi 6E and 2.5Gb Ethernet provide high-speed networking
  • 192GB DDR5 capacity up to 8200 MT/s supports heavy workloads

Specifications

BrandASUS
ModelPRIME B860-PLUS WIFI+Ultra 9 285K
Part NumberPRIME B860-PLUS WIFI+Ultra 9 285K
CPU Socket TypeLGA 1851
ChipsetIntel B860
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to 8200+ MT/s (OC)
Maximum Memory Supported192GB
Channel SupportedDual Channel
Memory FeatureSupport up to 8200+MT/s (OC), Non-ECC, Un-buffered ,Clocked Unbuffered DIMM (CUDIMM)*
Dual channel memory architecture
DIMM Fit
Supports Intel Extreme Memory Profile (XMP) memory module
ASUS Enhanced Memory Profile III (AEMP III)
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
PCI Express 5.0 x16Intel Core Ultra Processors (Series 2)
1 x PCIe 5.0 x16 slot
PCI Express 4.0 x16Intel B860 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
3 x PCIe 4.0 x16 slots (support x1 mode)
Serial ATA (SATA)4 x SATA 6Gb/s
M.2Intel Core Ultra Processors (Series 2)*
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
Intel B860 Chipset
M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
SATA RAID* Intel Rapid Storage Technology supports SATA RAID 0/1/5/10.
Audio ChannelsRealtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.3
Back I/O Ports1 x USB 20Gbps port (1 x USB Type-C)
2 x USB 10Gbps ports (2 x Type-A)
1 x USB 5Gbps port (1 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
Onboard USB1 x USB 5Gbps 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 CPU OPT Fan header
1 x 4-pin AIO Pump header
4 x 4-pin Chassis Fan headers
Miscellaneous
3 x Addressable Gen 2 headers
1 x Aura RGB header
1 x Clear CMOS header
1 x Chassis Intrusion header
1 x COM Port header
1 x Front Panel Audio header (F_AUDIO)
1 x S/PDIF Out header
1 x SPI TPM header (14-1pin)
1 x 10-1 pin Front System Panel header
1 x Thunderbolt (USB4) header
BIOS Feature2 x 128 Mb Flash ROM, UEFI AMI BIOS
SoftwareASUS 5X PROTECTION III
-DIGI+ VRM (- Digital power design with DrMOS)
- LANGuard
- Overvoltage Protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- 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
- VRM heatsink design
ASUS EZ DIY
- ProCool
- Pre-mounted I/O shield
Aura Sync
- Aura RGB header
- Addressable Gen 2 headers
Windows 11Windows 11
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
FeaturesASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 2+
- Power Saving
ASUS DriverHub
ASUS GlideX
ASUS CPU-Z
Norton 360 Deluxe (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
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 M.2 rubber package
1 x Screw package for M.2 SSD
Documentation
1 x Quick start guide

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the included thermal grease be enough for the CPU?

Yes, the Shin-Etsu X-23-7868-2D tube supplied in the combo is sized for a single CPU installation.

Does the motherboard support DDR5 memory speeds above 8200 MT/s?

The board is validated up to 8200+ MT/s when overclocked; speeds beyond that are not guaranteed.

Can I use all four M.2 slots at PCIe 5.0 speed?

Only the primary M.2_1 slot runs at PCIe 5.0 x4; the second M.2 slot operates at PCIe 4.0 x4.

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