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ATX motherboard with silver heatsinks and two DDR5 slots

ASUS

ASUS ROG MAXIMUS Z890 APEX +Ultra9 285K Intel motherboard

SKU CH-B151-FJWHJ

Intel Z890 ATX motherboard paired with a Core Ultra 9 285K CPU, 22+2+1+2 power stages, dual DDR5 slots up to 128GB, 5G LAN, WiFi 7, three PCIe 5.0 M.2 and Thunderbolt 4

  • ProcessorIntel Core Ultra Processors (Series 2)
  • ChipsetIntel Z890
  • Form factorATX
  • CPU socketLGA 1851
  • Memory slot count2 × 288pin (DDR5)
  • Max supported RAM128 GB

Motherboard ROG MAXIMUS Z890 APEX

CPU +Ultra9 285K

  • Ready for advanced AI PCs with Intel Core Ultra Series 2 support
  • Robust 22+2+1+2 stage power delivery with 110A, 90A and 80A stages
  • Exclusive AI overclocking, cooling and networking technologies simplify setup
  • Two DDR5 slots support up to 128GB at 9600+ MT/s overclocked
  • 5Gbps LAN, WiFi 7 and Bluetooth 5.4 for high-speed connectivity

Extreme Overclocking Platform

The ASUS ROG MAXIMUS Z890 APEX pairs an Intel Core Ultra 9 285K processor with a two-slot DDR5 motherboard built for record-seeking overclockers. The LGA 1851 socket and Z890 chipset deliver 22 power stages rated at 110A alongside supplementary 90A and 80A stages. AI Overclocking and NPU Boost automate frequency tuning while DIMM Fit and DIMM Flex optimise memory signal integrity. This combination targets enthusiasts who push silicon limits daily.

Dual-Channel DDR5 Headroom

Two 288-pin slots support up to 128GB of DDR5 running beyond 9600 MT/s when overclocked. The reduced slot count shortens trace lengths for higher frequency stability compared to four-slot designs. Dual-channel bandwidth feeds the 36MB L3 and 40MB L2 caches of the Arrow Lake CPU during memory-intensive workloads. Capacity tops out at 128GB so extreme multi-tasking or large dataset work may require a different platform.

125W Thermal Envelope

The bundled Core Ultra 9 285K carries a 125W base power rating on TSMC N3B silicon. No cooler ships in the box so thermal performance depends entirely on the chosen solution. Robust VRM cooling on the board handles the 22+2+1+2 stage array during sustained loads. Fan headers driven by AI Cooling II adjust curves automatically to balance airflow against acoustic output.

How it compares

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

Price $1,486.99
Pricier than about 95% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASUS
Product lineROG MAXIMUS Z890 APEX +Ultra9 285K
Model nameROG MAXIMUS Z890 APEX +Ultra9 285K
Processor
ProcessorIntel Core Ultra Processors (Series 2)
CPU socketLGA 1851
ChipsetIntel Z890
Memory
Memory slot count2 × 288pin (DDR5)
Max supported RAM128 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 (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 DIMM.2, type 2230/2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
DIMM.2_2 slot (Key M) via ROG DIMM.2, type 2230/2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
**M.2_3 & M.2_4 share bandwidth with PCIEX16(
Audio & video
Sound 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
- Gold-plated audio jacks
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
* A chassis with an HD audio module in the front panel is required to support 7.1 Su
Connectivity
Maximum network speed5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsSupport Intel Core Ultra Processors(series 2)*
2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 or x8/x4/x4 modes)**
Rear panel ports2 x Thunderbolt 4 ports (USB Type-C)
1 x USB 20 Gbit/s port (1 x USB Type-C)
4 x USB 10 Gbit/s ports (4 x Type-A)
4 x USB 5 Gbit/s ports (4 x Type-A)
1 x Wi-Fi Module
1 x Realtek 5Gb Ethernet port
2 x Gold-plated audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x Clear CMOS button
1 x PS/2 keyboard/mouse combo port
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V Power connector
1 × 8-pin PCIe Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 support(22H2 & later), Windows 10 64-bit (21H2 & later)
More details
BIOS2 × 256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

Will the LGA 1851 socket and 22+2+1+2 power stages run an older Intel Core Ultra processor if I keep my current CPU?

The socket is LGA 1851 and the VRM has 22(110A)+2(90A)+1(90A)+2(80A) stages; only Intel Core Ultra Series 2 processors are listed as supported.

How can I confirm the board is running the DDR5 memory at the rated 9600 MT/s after I enable XMP?

Enter the UEFI, enable the XMP profile, save and reboot; the POST screen and AI Advisor will report the active memory frequency.

Does the box include a CPU cooler for the 125 W Ultra 9 285K or must I buy one separately?

The processor is supplied without a cooling device; a compatible LGA 1851 cooler must be purchased separately.

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