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ATX motherboard with silver heatsinks and black PCB, boxed Intel Core Ultra 5 245K CPU beside it

ASUS

ASUS ROG MAXIMUS Z890 APEX + Ultra 5 245K Intel motherboard CPU combo

SKU CH-8HZJ-J89Q7

Z890 ATX board paired with a Core Ultra 5 245K, 22+2+1+2 power stages, DDR5 to 9600 MT/s, WiFi 7, 5G LAN, three PCIe 5.0 M.2 slots 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 +Ultra 5 245K

  • Ready for AI workloads with Intel Core Ultra 5 245K 3nm processor
  • Robust 22+2+1+2 stage power delivery with 110A and 90A stages
  • DDR5 memory support up to 9600 MT/s on two slots for 128GB max
  • WiFi 7 and 5Gbps LAN plus Bluetooth 5.4 for fast connectivity
  • Three PCIe 5.0 M.2 slots and Thunderbolt 4 ports for high-speed storage

Z890 APEX combo for AI workloads

The board pairs an LGA 1851 socket with the Intel Core Ultra 5 245K processor built on a 3 nm process. Dual-channel DDR5 support reaches 128 GB at speeds beyond 9600 MT/s when overclocked. The 22+2+1+2 phase VRM uses 110 A, 90 A and 80 A stages to feed the 125 W CPU during sustained AI inference and heavy multitasking.

AI tuning and connectivity bundle

ASUS AI Advisor, AI Overclocking, AI Cooling II and AI Networking II automate voltage, fan curves and traffic prioritisation without manual intervention. NPU Boost, DIMM Fit, DIMM Flex and AEMP III simplify memory optimisation. Rear I/O adds two Thunderbolt 4 ports, one 20 Gbps USB-C, four 10 Gbps Type-A, four 5 Gbps Type-A, 5 Gb Ethernet, Wi-Fi 7 and Bluetooth 5.4 plus SupremeFX 7.1 audio.

Three PCIe 5.0 M.2 slots and dual x16

M.2_1 runs at PCIe 5.0 x4 while M.2_2 and M.2_3 share bandwidth with the second x16 slot, dropping it to x8 or x4 when populated. Two additional PCIe 4.0 x4 slots and four SATA 6 Gb/s ports handle secondary storage. The 128 GB memory ceiling and robust VRM give headroom for large language models, but the two DIMM slots limit maximum density per channel.

Highlights

  • Ready for AI workloads with Intel Core Ultra 5 245K 3nm processor
  • Robust 22+2+1+2 stage power delivery with 110A and 90A stages
  • DDR5 memory support up to 9600 MT/s on two slots for 128GB max
  • WiFi 7 and 5Gbps LAN plus Bluetooth 5.4 for fast connectivity
  • Three PCIe 5.0 M.2 slots and Thunderbolt 4 ports for high-speed storage

Specifications

BrandASUS
SeriesROG MAXIMUS Z890 APEX+Ultra 5 245K
ModelROG MAXIMUS Z890 APEX+Ultra 5 245K
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 CPU cooler need upgrading if I push the Core Ultra 5 245K beyond its 125W base power?

The processor has a 125W base power rating. Sustained loads above that level will require a cooler rated for higher thermal dissipation than the stock solution.

What limits the PCIe 5.0 x16 slots when all three M.2 drives are populated?

Enabling M.2_3 and M.2_4 forces the primary PCIe 5.0 x16 slot to run at x8 and the second at x4, reducing GPU bandwidth.

How hot do the 22+2+1+2 power stages get during all-day AI workloads?

The 110A, 90A and 80A stages are paired with MicroFine alloy chokes and metallic capacitors to manage heat, while AI Cooling II adjusts fan curves automatically.

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