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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 socketLGA 1851
  • ChipsetIntel B860
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to 8200+ MT/s (OC)
  • Max supported RAM192 GB

Model PRIME B860-PLUS WIFI

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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.

How it compares

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

Price $1,020.99
Pricier than about 93% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASUS
Model namePRIME B860-PLUS WIFI+Ultra 9 285K
Part numberPRIME B860-PLUS WIFI+Ultra 9 285K
Processor
CPU socketLGA 1851
ChipsetIntel B860
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to 8200+ MT/s (OC)
Max supported RAM192 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsIntel 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 and RAID support* Intel Rapid Storage Technology supports SATA RAID 0/1/5/10.
Audio & video
Sound 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.
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 ax
Bluetooth support5.3
Ports & slots
PCIe 5.0 x16 slotsIntel Core Ultra Processors (Series 2)
1 x PCIe 5.0 x16 slot
PCIe 4.0 x16 slotsIntel B860 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
3 x PCIe 4.0 x16 slots (support x1 mode)
Onboard USB headers1 x USB 5 Gbit/s connector (supports USB Type-C)
1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports
1 x USB 2.0 header supports 2 additional USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connectors
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportWindows 11
More details
BIOS2 × 128 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

5 more in the same range

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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