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ASUS ROG STRIX B860-A motherboard and Ultra 9 285K CPU in retail packaging

ASUS

ASUS ROG STRIX B860-A GAMING WIFI S Intel motherboard & Ultra 9 285K CPU combo

SKU CH-7TPC-4MXQT

A motherboard and CPU bundle with 14-phase power delivery, DDR5-7600 support, four M.2 slots, WiFi 6E, 2.5Gb LAN, USB4 header and Shin-Etsu thermal grease

  • CPU Socket TypeLGA 1851

model ROG STRIX B860-A GAMING WIFI S

+CPU +Ultra 9 285K

  • Ready-to-build bundle with motherboard, CPU and thermal grease included
  • 14 plus 1 phase 50A and 60A DrMOS VRM with ProCool II connectors
  • DDR5 optimised to 7600 plus speeds via AEMP II with SafeDIMM reinforcement
  • PCIe 5.0 x16 SafeSlot and four M.2 slots with heatsinks
  • WiFi 6E plus 2.5Gb LAN, USB4 header and rear USB 20Gbps Type-C

Combo overview

This bundle pairs the ASUS ROG STRIX B860-A GAMING WIFI S motherboard with the Intel Core Ultra 9 285K processor and Shin-Etsu X-23-7868-2D thermal paste. The board uses the LGA 1851 socket and is built for DDR5 memory. The CPU is a 125W part fabricated on a 3nm process with 36MB L3 and 40MB L2 cache. Integrated Intel graphics are included on the processor die.

Sustained power delivery

The motherboard implements a 14+1 phase VRM using 50A and 60A DrMOS stages fed by ProCool II connectors and enlarged heatsinks. This design is intended to maintain stable voltage for the 125W processor during extended workloads rather than only brief bursts. AEMP II technology on the board helps DDR5 modules reach 7600 MT/s while the reinforced SafeDIMM slots protect signal integrity under continuous thermal cycling.

Interface practical limits

The platform provides a PCIe 5.0 x16 SafeSlot and four M.2 sockets with heatsinks, one of which operates at PCIe 5.0 x4. Rear I/O includes a USB 20Gbps Type-C port and 2.5Gb LAN while a front-panel USB 10Gbps Type-C header and a USB4 header are available internally. WiFi 6E handles wireless connectivity. These interfaces define the maximum throughput ceiling for attached storage, peripherals and network links.

Points forts

  • Ready-to-build bundle with motherboard, CPU and thermal grease included
  • 14 plus 1 phase 50A and 60A DrMOS VRM with ProCool II connectors
  • DDR5 optimised to 7600 plus speeds via AEMP II with SafeDIMM reinforcement
  • PCIe 5.0 x16 SafeSlot and four M.2 slots with heatsinks
  • WiFi 6E plus 2.5Gb LAN, USB4 header and rear USB 20Gbps Type-C

Caractéristiques

BrandASUS
ModelROG STRIX B860-A GAMING WIFI S+Ultra 9 285K
CPU Socket TypeLGA 1851

Autres versions de ce modèle

5 de plus dans cette gamme

Même famille, mémoire, ventirad ou fréquence différents — comparez avant de vous décider.

Questions sur cet article

How hot does the Ultra 9 285K run with the Shin-Etsu X-23-7868-2D paste during sustained loads?

The Ultra 9 285K is a 125W processor. The included Shin-Etsu X-23-7868-2D thermal grease has a 6.2 W/m.k conductivity and 0.07 °C·cm²/W resistance to transfer heat efficiently from the CPU die to your cooler.

What memory and cooler must I supply to complete this LGA 1851 build?

You need DDR5 modules — the board supports DDR5-7600+ via AEMP II — and a separate CPU cooler, because the Ultra 9 285K ships without one. The kit includes Shin-Etsu X-23-7868-2D paste for the install.

Can I keep my PCIe 5.0 graphics card and M.2 drives when moving to this B860 board?

Yes. The board provides a PCIe 5.0 x16 SafeSlot for your graphics card and four M.2 slots — one wired for PCIe 5.0 x4 — all with heatsinks, so existing high-speed storage and GPUs work at full speed.

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