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E-ATX motherboard with massive heatsinks, U-shaped heatpipe, 3D VC M.2 heatsink, LGA 1851 socket, CPU installed, black finish

ASUS

ASUS ROG MAXIMUS Z890 EXTREME Intel motherboard & Core Ultra 9 285K CPU Combo

SKU CH-XKWQ-Y4Y2R

A combo pairing a Z890 E-ATX board with LGA 1851 socket, 24+2+1+2 power stages, DDR5 up to 9200 MT/s, WiFi7, 2.5G and 10G LAN, PCIe 5.0 M.2, Thunderbolt 5.

  • ProcessorIntel Core Ultra Processors (Series 2)
  • ChipsetIntel Z890
  • Form factorExtended ATX
  • CPU socketLGA 1851
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB

Motherboard ROG MAXIMUS Z890 EXTREME

CPU +Ultra9 285K

  • AI overclocking and cooling simplify tuning for higher speeds
  • CES 2025 Innovation Award honours exceptional design and engineering
  • LGA 1851 socket supports Intel Core Ultra 9 285K CPU
  • 24+2+1+2 power stages with massive heatsinks and U-shaped heatpipe
  • WiFi7, 10G LAN and Thunderbolt 5 deliver ultra-fast connectivity

Intel LGA 1851 combo for AI workloads

The bundle pairs a ROG MAXIMUS Z890 EXTREME motherboard with an Intel Core Ultra 9 285K processor on the LGA 1851 platform. It targets builders who want a single SKU for advanced AI PC tasks and high-end desktop performance. The board delivers a 24+2+1+2 stage power design and supports DDR5 memory up to 9200 MT/s. Buyers who need a second CPU or a different socket should look elsewhere.

Massive heatsinks with U-shaped heatpipe and 3D VC

Large heatsinks integrate with the I/O cover and connect to the power stages through high-conductivity thermal pads. A U-shaped heatpipe links the VRM and chipset zones, while a 3D vapor-chamber heatsink covers the primary PCIe 5.0 M.2 slot. AI Cooling II adjusts fan curves automatically based on system load. The included processor has a 125 W base power rating and no cooler in the box.

AI Advisor, AI Overclocking.

ASUS AI Advisor provides natural-language guidance for BIOS settings. AI Overclocking profiles the CPU and cooling to suggest stable frequency targets. AI Networking II optimises traffic across the 10 Gbps and 2.5 Gbps Ethernet ports plus WiFi7. NitroPath DRAM Technology, DIMM Fit, DIMM Flex and AEMP III simplify DDR5 tuning. Thunderbolt 5 adds two 80 Gbps USB-C ports for high-speed peripherals.

How it compares

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

Price $2,022.99
Pricier than about 97% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASUS
Product lineROG MAXIMUS Z890 EXTREME+Ultra9 285K
Model nameROG MAXIMUS Z890 EXTREME+Ultra9 285K
Processor
ProcessorIntel Core Ultra Processors (Series 2)
CPU socketLGA 1851
ChipsetIntel Z890
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsSupport Intel Core Ultra Processors (series 2)*
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 modes)**
M.2_4 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 modes)**
Intel Z890 Chipset
DIMM.2_1 slot (Key M) via ROG Q-DIMM.2, type 2230/2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
DIMM.2_2 slot (Key M) via ROG Q-DIMM.2, type 2230/2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
**M.2_3 & M.2_4 share bandwidth wit
SATA and RAID support*Intel Rapid Storage Technology supports PCIe RAID 0/1/5/10, SATA RAID 0/1/5/10, M.2 slot from CPU only supports RAID 0/1/5.
Audio & video
Sound channelsROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4082**
- 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 10 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel
Audio Features
- SupremeFX Shielding Technology
- ESS ES9219 QUAD DAC
- LED-illuminated audio jacks
- Rear optical S/PDIF out port
- Premium audio capacitors
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Soun
Connectivity
Maximum network speed10 Gbit/s + 2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsIntel Core Ultra Processors (series 2)*
2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 or x8/x4/x4 modes)**
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connector
1 × 8-pin PCIe Power connector
Size & build
Form factorExtended ATX
Width and length12.0 in × 10.9 in
Compatibility
Windows 11 supportWindows 11, Windows 10 64-bit
More details
BIOS2 × 256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

5 more in the same range

Questions about this item

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

Align the triangle marker on the Core Ultra 9 285K with the socket corner, lower it straight down without pressure, then close the retention lever; the integrated loading mechanism seats the processor evenly across the 1851 contacts.

What maintenance will the 125 W processor and 24+2+1+2 stage VRM need after prolonged use?

Clean dust from the massive heatsinks, U-shaped heatpipe and 3D VC M.2 heatsink every 6-12 months; reapply thermal paste on the CPU die if temperatures rise above your normal baseline.

Which thermal or power limit appears first when the 285K runs all-core workloads continuously?

The 125 W base power envelope is the first ceiling; AI Cooling II and the VRM heatsink array manage the resulting heat, but sustained all-core boost will sit at or below that 125 W figure.

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