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Silver-white ATX motherboard with CPU and thermal paste tube

ASUS

ASUS ROG STRIX Z790-A GAMING WIFI S Intel motherboard & Ultra 9 285K CPU combo

SKU CH-MKHJ-MR40N

A Z790 motherboard and Ultra 9 285K CPU combo with 16+1+2 power phases, DDR5 support to 8000, five M.2 slots, WiFi 7, 2.5Gbps LAN, and included Shin-Etsu thermal paste

  • ChipsetIntel Z790
  • Number of Memory Slots4x288pin (DDR5)
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel
  • Memory FeatureSupports Intel® Extreme Memory Profile (XMP) memory module S
  • PCI Express 5.0 x16Intel® Core™ Processors (14th & 13th & 12th Gen)* 1 x PCIe 5

model ROG STRIX Z790-A GAMING WIFI S

+CPU +Ultra 9 285K

  • Ready for AI workloads with Intel Core Ultra 9 285K 3nm processor
  • Stable overclocking headroom from 16+1+2 phase 70A DrMOS power design
  • High-speed DDR5 memory up to 8000 MT/s with DIMM Flex thermal control
  • Next-gen connectivity via WiFi 7 and 5 Gbps plus 2.5 Gbps LAN
  • Five M.2 slots with full thermal armour for expansive storage

Combo Ready for AI Workloads

This bundle pairs an Intel Ultra 9 285K processor with an ASUS ROG STRIX Z790-A GAMING WIFI S motherboard. The 125W CPU delivers 36MB L3 cache and 40MB L2 cache built on a 3nm process. The board provides an LGA 1700 socket and a 16+1+2 phase 70A DrMOS power design. Four DDR5 slots support up to 192GB of memory with XMP and AEMP II profiles.

Thermals Power and Noise

The motherboard uses dual VRM heatsinks linked by heat pipes to manage the 70A power stages during heavy loads. M.2 slots feature double-sided thermal armour to keep drive temperatures stable. AI Cooling II auto-tunes fan curves based on system temperature data. The included Shin-Etsu X-23-7868-2D thermal compound offers 6.2 W/m.k conductivity and 0.07 °C*cm^2/W resistance for efficient heat transfer from the CPU.

Build Connectors and Daily Use

The silver and white armour carries Polymo dynamic lighting compatible with AURA Sync ecosystems. Rear I/O supplies 12 USB ports including one 20Gbps Type-C, three 10Gbps ports, four 5Gbps ports and four 2.0 ports. Networking combines Wi-Fi 7, Bluetooth 5.4, 5Gbps LAN and 2.5Gbps LAN. Five M.2 slots and four SATA 6Gb/s ports provide extensive storage expansion. The board also includes PCIe 5.0 x16 and PCIe 4.0 x16 slots for graphics and add-in cards.

Highlights

  • Ready for AI workloads with Intel Core Ultra 9 285K 3nm processor
  • Stable overclocking headroom from 16+1+2 phase 70A DrMOS power design
  • High-speed DDR5 memory up to 8000 MT/s with DIMM Flex thermal control
  • Next-gen connectivity via WiFi 7 and 5 Gbps plus 2.5 Gbps LAN
  • Five M.2 slots with full thermal armour for expansive storage

Specifications

BrandASUS
SeriesROG STRIX Z790-A GAMING WIFI S+Intel Ultra 9 285K
ModelROG STRIX Z790-A GAMING WIFI S+Intel Ultra 9 285K
ChipsetIntel Z790
Number of Memory Slots4x288pin (DDR5)
Maximum Memory Supported192GB
Channel SupportedDual Channel
Memory FeatureSupports Intel® Extreme Memory Profile (XMP) memory module
Supports DIMM Flex
OptiMem II
ASUS Enhanced Memory Profile II (AEMP II)
* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information site or visit https://www.asus.com/support/.
** Non-ECC, un-buffered DDR5 memory supports On-Die ECC function
PCI Express 5.0 x16Intel® Core™ Processors (14th & 13th & 12th Gen)*
1 x PCIe 5.0 x16 slot
PCI Express 4.0 x16Intel® Z790 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
1 x PCIe 3.0 x1 slot
PCI Express x41 x PCIe 4.0 x16 slot
Serial ATA (SATA)4 x SATA 6Gb/s
M.2Supports 5 x M.2 slots and 4 x SATA 6Gb/s ports*
Intel® Core™ Processors (14th & 13th & 12th Gen)
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
Intel® Z790 Chipset
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
M.2_4 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
M.2_5 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes)
4 x SATA 6Gb/s ports
SATA RAID* Intel® Rapid Storage Technology supports PCIe RAID 0/1/5/10, SATA RAID 0/1/5/10
Audio Channels7.1 Channels
Max LAN Speed5Gbps + 2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports1 x USB 20Gbps port (1 x USB Type-C®)
3 x USB 10Gbps ports (2 x Type-A+1 x USB Type-C®)
4 x USB 5Gbps ports (4 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x DisplayPort
1 x HDMI™ port
1 x Wi-Fi module
1 x Intel® 2.5Gb Ethernet
2 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack™ button
1 x Clear CMOS button
Onboard USBRear USB (Total 12 ports)
1 x USB 20Gbps port (1 x USB Type-C®)
3 x USB 10Gbps ports (2 x Type-A + 1 x USB Type-C®)
4 x USB 5Gbps ports (4 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
Front USB (Total 7 ports)
1 x USB 20Gbps (supports USB Type-C® with up to with up to 30W PD Fast-charge )
1 x USB 5Gbps header supports 2 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
5 x 4-pin Chassis Fan headers
Miscellaneous
3 x Addressable Gen 2 headers
1 x Aura RGB header
1 x CPU Over voltage jumper
1 x Front panel audio header (F_AUDIO)
1 x 20-3 pin system panel header with Chassis intrude function
1 x Thermal sensor header
1 x Thunderbolt™ (USB4®) header
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
SoftwareROG Exclusive Software
- ROG CPU-Z
- DTS® Sound Unbound
ASUS Exclusive Software
Armoury Crate
- AIDA64 Extreme (60 days free trial)
- Aura Creator
- Aura Sync
- Fan Xpert 4 (with AI Cooling II)
- GameFirst
- Power Saving
- Sonic Studio
- Two-Way AI Noise Cancelation
AI Suite 3
- Easy Optimization with AI Overclocking
- TPU
- DIGI+ VRM
- Turbo app
- PC Cleaner
MyASUS
USB Wattage Watcher
Intel® Unison™
Adobe Creative Cloud (Free Trial)
Norton 360 for Gamers (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
AI Overclocking Guide
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Fla
Windows 11Windows® 11, Windows® 10 64-bit
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
FeaturesExtreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- M.2 Q-Latch
- PCIe Slot Q-Release
- Q-Antenna
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green]) with DRAM Detection
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS button
- CPU Socket lever protector
- ProCool II
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Aura RGB header
- Addressable Gen 2 headers
Front Panel USB 20Gbps with PD Fast Charge Support
- S
Package Contents1 x intel Ultra 9 285K CPU
1 x Thermal grease: Shin-Etsu X-23-7868-2D
Cables
2 x SATA 6Gb/s cables
Additional Cooling Kit
1 x Thermal pad for M.2
Miscellaneous
1 x ASUS Wi-Fi Q-Antenna
1 x Cable ties package
1 x M.2 backplate Q-Latch package
1 x M.2 Q-Latch package
1 x ROG key chain
1 x ROG Strix stickers
2 x M.2 rubber packages
1 x M.2 backplate Rubber package
Documentation
1 x Quick start guide

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Questions about this item

Will the included thermal paste cover the larger surface of the Ultra 9 285K?

Yes, the Shin-Etsu X-23-7868-2D syringe is rated for easy application on current LGA 1700 CPUs and its 6.2 W/m.k conductivity handles the 125 W processor.

Can I populate all four DDR5 slots and still reach high speeds?

The board supports up to 192 GB across four slots with XMP and AEMP II profiles; DIMM Flex helps maintain stability when all slots are filled.

How many PCIe 5.0 M.2 drives can I install without sharing bandwidth?

One M.2 slot runs at PCIe 5.0 x4 from the CPU; the remaining four operate at PCIe 4.0 x4 from the chipset.

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