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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

  • CPU Socket TypeLGA 1851
  • CPU TypeIntel Core Ultra Processors (Series 2)
  • ChipsetIntel Z890
  • Number of Memory Slots2x288pin (DDR5)
  • Maximum Memory Supported128GB
  • Channel SupportedDual Channel

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.

Highlights

  • 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

Specifications

BrandASUS
SeriesROG MAXIMUS Z890 APEX +Ultra9 285K
ModelROG MAXIMUS Z890 APEX +Ultra9 285K
CPU Socket TypeLGA 1851
CPU TypeIntel Core Ultra Processors (Series 2)
ChipsetIntel Z890
Number of Memory Slots2x288pin (DDR5)
Maximum Memory Supported128GB
Channel SupportedDual Channel
Memory FeatureSupports up to 9600+ 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
Supports DIMM Flex
ASUS Enhanced Memory Profile III (AEMP III)
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
PCI Express 5.0 x16Support Intel Core Ultra Processors(series 2)*
2 x PCIe 5.0 x16 slots (supports x16 or x8/x8 or x8/x4/x4 modes)**
PCI Express x42 x PCIe 4.0 x4 slots
** M.2_3 & M.2_4 share bandwidth with PCIEX16(G5)_2. When M.2_3 is enabled, PCIEX16(G5)_1 will run x8 & PCIEX16(G5)_2 will run x4. When M.2_3 & M.2_4 are enabled, PCIEX16(G5)_1 will run x8 & PCIEX16(G5)_2 will disabled.
Serial ATA (SATA)4 x SATA 6Gb/s
M.2Support 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 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
Max LAN Speed5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports2 x Thunderbolt 4 ports (USB Type-C)
1 x USB 20Gbps port (1 x USB Type-C)
4 x USB 10Gbps ports (4 x Type-A)
4 x USB 5Gbps 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
Onboard USB1 x USB 20Gbps connector (supports USB Type-C)
1 x USB 10Gbps connector (supports USB Type-C)
2 x USB 5Gbps headers support 4 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 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
2 x 4-pin Chassis Fan headers
2 x 4-pin Full Speed Fan headers
1 x W_PUMP+ header
1 x Extra Flow Fan header
Miscellaneous
1 x 80 Light Bar jumper
3 x Addressable Gen 2 headers
1 x Alteration PCIe mode switch
4 x BCLK button
1 x BIOS Switch button
1 x FlexKey button
1 x Front Panel Audio header (F_AUDIO)
1 x LN2 Mode jumper
1 x Pause switch
18 x ProbeIt Measurement Points
1 x ReTry button
2 x RSVD switches
1 x RSVD header
1 x Safe Boot button
1 x Slow Mode switch
1 x Start button
1
BIOS Feature2 x 256 Mb Flash ROM, UEFI AMI BIOS
SoftwareROG Exclusive Software
- ROG CPU-Z
- Dolby Atmos
- Internet Security (1-year full version)
ASUS Exclusive Software
Armoury Crate
- AIDA64 Extreme (1 year full version)
- Aura Creator
- Aura Sync
- Fan Xpert 4 (with AI Cooling II)
- GameFirst
- Power Saving
- HWiNFO
ASUS AI Advisor
ASUS Driver Hub
ASUS GlideX
Turbo Vcore
Adobe Creative Cloud (Free Trial)
Thunderbolt Share
USB Wattage Watcher
WinRAR (40 Days Free Trial)
UEFI BIOS
AI Overclocking Guide
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkey
NPU Boost
Windows 11Windows 11 (22H2 & later), Windows 10 64-bit (21H2 & later)
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
2 x 8-pin +12V Power connector
1 x 8-pin PCIe Power connector
FeaturesExtreme OC Kit
- FlexKey button
- LN2 Mode
- ProbeIt
- ReTry button
- Safe boot button
- Start button
- Slow Mode
Extreme Engine Digi+
- SMD Capacitor
- MicroFine Alloy Choke
ASUS Q-Design
- M.2 Q-Latch
- M.2 Q-Release
- M.2 Q-Slide
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- Q-Antenna
- Q-Code
- Q-Dashboard
- Q-Connector
- 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
- BIOS FlashBack button
- Clear CMOS button
- CPU Socket lever protect

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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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