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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
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM192 GB
  • Memory channelsDual Channel
  • Memory highlightsSupports Intel® Extreme Memory Profile (XMP) memory module S

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.

How it compares

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

Price $1,235.99
Pricier than about 94% of the 2,965 comparable items (median $97.99).

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Specifications

Product
Brand nameASUS
Product lineROG STRIX Z790-A GAMING WIFI S+Intel Ultra 9 285K
Model nameROG STRIX Z790-A GAMING WIFI S+Intel Ultra 9 285K
Processor
ChipsetIntel Z790
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM192 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsSupports 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 and RAID support* Intel® Rapid Storage Technology supports PCIe RAID 0/1/5/10, SATA RAID 0/1/5/10
Audio & video
Sound channels7.1 Channels
Connectivity
Maximum network speed5 Gbit/s + 2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsIntel® Core™ Processors (14th & 13th & 12th Gen)*
1 x PCIe 5.0 x16 slot
PCIe 4.0 x16 slotsIntel® Z790 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
1 x PCIe 3.0 x1 slot
PCIe x4 slots1 x PCIe 4.0 x16 slot
Power
Power connectors1 × 24-pin main power connector
2 × 8-pin +12 V power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportWindows® 11, Windows® 10 64-bit
More details
BIOS256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

5 more in the same range

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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