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Intel Core ultra 9 CPU 285k 24 cores

Product image: Intel Core ultra 9 CPU 285k 24 cores, , medium-null
Product image: Intel Core ultra 9 CPU 285k 24 cores, , medium-null
Product image: Intel Core ultra 9 CPU 285k 24 cores, , medium-null
Product image: Intel Core ultra 9 CPU 285k 24 cores, , medium-null
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Intel Core ultra 9 CPU 285k 24 cores

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Description

Item No. 0bcc26e2-4869-4c1b-9d13-ce51dfad4be5
Intel Core Ultra 9 CPU 285K 24 cores up to 5.7 GHz

Attributes

Processor Characteristics

  • L3 Cache: 36 MB
  • Processor Threads: 24
  • Socket: LGA 1851
  • Thermal Design Power (TDP): 125 W
  • CPU Frequency: Up to 5.7 GHz
  • Processor Cores: 24

Details

Intel Core Ultra 9 285K Unlocked Desktop Processor

Core Ultra Series 2 Arrow Lake · FCLGA1851 · Boxed (no cooler)
24-Core 24-ThreadUp to 5.7 GHz36 MB Intel Smart Cache CacheIntel Arc (Xe-LPG)

TheIntel Core Ultra 9 285K is a Core Ultra Series 2 (Arrow Lake) desktop processor with 8 Performance-cores + 16 Efficient-cores (24 total) and 24 threads, a 3.7 GHz base clock that boosts to 5.7 GHz, plus integrated Intel Arc (Xe-LPG) graphics. Supplied as the retail boxed version (part number BX80768285K, EAN 5032037281928); note that unlocked K-series boxed processors do not include a cooler. Typically in stock with fast delivery across Cyprus.

Compatibility — read before you buy
This processor uses the Intel LGA1851 socket and needs a compatible motherboard (Intel 800-series boards only, such as Z890, B860 or H810 — note the new LGA1851 socket is not compatible with LGA1700). It supports DDR5-6400 memory up to 192GB. The unlocked multiplier allows overclocking on Z-series boards. As an unlocked CPU it ships without a cooler — add a compatible air or liquid cooler.

Best For

✓Enthusiast & flagship gaming
✓Professional content creation
✓3D rendering & video editing
✓Simulation & compute workloads
✓Streaming while gaming
✓No-compromise performance builds

Key Features

 
24-Core 24-Thread Hybrid Design
8 Performance-cores handle demanding single-threaded tasks while 16 Efficient-cores tackle background and multi-threaded workloads, with 24 total threads for smooth multitasking and content creation.
 
Up to 5.7 GHz Turbo
A 3.7 GHz base clock lifts to 5.7 GHz on demand for responsive, high-FPS performance.
 
Unlocked for Overclocking
The unlocked multiplier lets you push clocks higher on a Z-series motherboard with adequate cooling, extracting extra performance for enthusiasts.
 
DDR5 & PCIe 5.0 / 4.0 Platform
Supports DDR5-6400 and PCI Express 5.0 / 4.0 with 24 (20x Gen5 + 4x Gen4) CPU lanes, giving fast storage and graphics bandwidth on its LGA1851 platform.

Technical Specifications

Identification
Part Number BX80768285K
EAN / GTIN 5032037281928
MPN BX80768285K
Processor
Family Intel Core-class (Core Ultra Series 2, Arrow Lake)
Segment Desktop
Cores / Threads 24 / 24 — 8P + 16E
Base Frequency P-core 3.7 GHz / E-core 3.2 GHz
Max Turbo Frequency 5.7 GHz
L3 Cache 36 MB Intel Smart Cache
L2 Cache 40 MB
Processor Base Power 125 W base / 250 W max turbo
Lithography TSMC N3B compute tile
Memory
Memory Support DDR5-6400
Max Memory 192GB
Memory Channels 2
Max Bandwidth 102.4GB/s
ECC Support No
Graphics
Integrated GPU Intel Arc (Xe-LPG)
Graphics Clock up to 2.0 GHz
Displays Supported Up to 4
Expansion
PCI Express PCIe 5.0 / 4.0 — 1x16 + 1x4 on Gen5, plus 1x4 on Gen4
Max PCIe Lanes 24 (20x Gen5 + 4x Gen4)
Package
Socket FCLGA1851
TJUNCTION 105°C
In the Box Processor (no cooler included)

Frequently Asked Questions

What motherboard do I need for the Core Ultra 9 285K?
It uses the Intel LGA1851 socket, so it fits compatible boards (Intel 800-series boards only, such as Z890, B860 or H810 — note the new LGA1851 socket is not compatible with LGA1700). A BIOS update may be needed on older boards for newer CPUs. It will not fit other Intel sockets.
Does the Core Ultra 9 285K come with a cooler?
No. As an unlocked boxed K-series processor it does not include a cooler — you will need a capable air or liquid cooler, especially for sustained turbo and overclocking.
Do I need a graphics card with the Core Ultra 9 285K?
Not necessarily. It includes Intel Arc (Xe-LPG) for desktop, office and video use across multiple displays. For gaming or GPU-accelerated work, add a dedicated graphics card.
What is the difference between the Core Ultra 9 285K and the Core Ultra 7 265K?
The Core Ultra 9 285K is the flagship with 24 cores (8P+16E) and up to 5.7 GHz, while the Core Ultra 7 265K has 20 cores (8P+12E) for less money. Arrow Lake P-cores do not use Hyper-Threading, so cores and threads are equal. This boxed K-series ships without a cooler.
Singular Expert Insight
The Core Ultra 9 285K is Intel’s Arrow Lake flagship: 24 cores (8 Performance + 16 Efficient, no Hyper-Threading) deliver excellent multi-threaded performance with much lower power and heat than the previous i9-14900K. It includes an Intel AI Boost NPU (13 TOPS, an AI PC though below the 40+ TOPS Copilot+ threshold) and integrated Intel Arc graphics. It requires a new LGA1851 800-series board and DDR5, and as a K-series ships without a cooler. To get the most from it, pair it with dual-channel DDR5 memory and a motherboard that matches your performance and upgrade plans.

Buyer's Guide

Buy it if
You want a flagship, power-efficient 24-core CPU for content creation, rendering and high-end gaming on the latest LGA1851 platform, with DDR5 and strong cooling.
Skip it if
You are on an existing LGA1700 build (this needs a new board), want maximum gaming FPS per euro, or do not need 24 cores.
Also consider
The Core Ultra 7 265K (fewer cores, cheaper), the i7-14700K on LGA1700, orAMD Ryzen 9 alternatives.