Intel Core Ultra 9 285K Desktop Processor
- Processor Core Count: 24
- Processor Count: 24
- Processor Socket: LGA 1851
- Processor Series: Core i9
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A capable hybrid 24-core chip for a fresh enthusiast build, provided the budget also covers an 800-series board, DDR5 memory and a cooler.
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ASIN: B0DFKC99VLCategory: CPU Processors
Overview
Intel's unlocked flagship desktop CPU, an 8 P-core plus 16 E-core hybrid design running up to 5.7GHz with 40MB of cache. Built for enthusiast gaming and content creation rigs on the new Intel 800-series platform.
This is a series-2 Core Ultra chip, which means it needs an 800-series chipset motherboard and DDR5 memory rather than dropping into an older LGA1700 board. It ships without a cooler, so the 125W base power draw is a line item to plan for, not an afterthought.
- 8 P-cores + 16 E-cores, 24 threads
- Up to 5.7GHz unlocked, 40MB cache
- PCIe 5.0 and 4.0, DDR5 support
- Compatible with Intel 800-series chipsets
Who it's for
Suits someone building a new high-end desktop from scratch who wants top single-thread clocks for gaming alongside 24 threads for rendering or streaming. Not a fit for anyone hoping to reuse an existing 12th or 13th gen Intel motherboard.
Pros and cons
- 24 cores and 24 threads for heavy multitasking
- Unlocked multiplier for manual overclocking
- PCIe 5.0 and 4.0 plus DDR5 support
- Integrated graphics as a fallback display
- No cooler included despite 125W base power
- Requires a new Intel 800-series motherboard
- DDR5-only, no path from an existing DDR4 build
Performance notes
The hybrid layout splits work between 8 performance cores for latency-sensitive tasks like gaming and 16 efficiency cores that soak up background and multi-threaded load, so the chip stays responsive under mixed workloads. Turbo Boost Max 3.0 pushes the fastest cores to 5.7GHz for single-threaded spikes, while PCIe 5.0 and 4.0 lanes keep storage and GPU bandwidth ahead of older platforms. Integrated graphics let the system post and display video even before a discrete card is installed.
Where it stands among cpu processors
- #8 most-searched brand and model of the 91 cpu processors lines we track (by search demand, not sales).
From the specs of the 16 cpu processors we list; not a test result.
Specifications
| Brand | Intel® |
|---|---|
| Dimensions & fit | |
| Cache Memory Installed Size | 0.04 GB |
| Item Weight | 0.66 pounds |
| Item Dimensions L x W | 6.7 × 6 inches |
| Power & efficiency | |
| Wattage | 125 watts |
| Warranty & support | |
| Warranty Description | 3 years |
| Other details | |
| Processor Core Count | 24 |
| Processor Count | 24 |
| Processor Socket | LGA 1851 |
| Processor Series | Core i9 |
| Processor Number of Concurrent Threads | 24 |
| Secondary Cache | 36 MB |
| Processor Brand | Intel |
| Platform | Windows 11 |
| Number of Items | 1 |
| Mfr Part Number | BX80768285K |
| BuiltIn Media | Item |
Closest rivals on specs
AMD Ryzen 7 5700 Desktop Processor- Cache Memory Installed Size 0.04 vs 0.02 GB (+100%)
- Item Weight 0.66 vs 0.95 pounds (-31%)
- Wattage 125 vs 65 watts (+92%)
Intel Core i5-12400F Desktop Processor- Cache Memory Installed Size 0.04 vs 0.02 GB (+122%)
- Item Weight 0.66 vs 1.04 pounds (-37%)
- Wattage 125 vs 65 watts (+92%)
AMD Ryzen 7 5800X3D Desktop Processor- Cache Memory Installed Size 0.04 vs 0.1 GB (-60%)
- Item Weight 0.66 vs 0.22 pounds (+200%)
- Wattage 125 vs 105 watts (+19%)
Frequently asked questions
What motherboards does it work with?
Boards built on the Intel 800-series chipset.
How many cores and threads does it have?
24 cores total, 8 performance and 16 efficiency, giving 24 threads.