Intel® Core™ Ultra 9 Processor 285K 24 cores
- CPU Processor
- 125 watts
- 1
- 24
- More reviewed than 56%
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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How it ranks among the 16 cpu processors we track
4.6★ across 791 Amazon ratings, Bayesian-smoothed toward the category average.
791 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
500+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 16 cpu processors we track - how the scorecard works · full cpu processors data report. Confidence: high - strong rating volume and complete data.Updated 6 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
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.
Strengths and trade-offs
Drawn from this product's published specifications.
- 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.
Specifications
| Brand | Intel® |
|---|---|
| Dimensions & fit | |
| Item Weight | 10.6 ounces |
| Item Dimensions L x W | 6.7 × 6 inches |
| Cache Memory Installed Size | 40 MB |
| Capacity & performance | |
| Processor Speed | 5.7 GHz |
| Power & efficiency | |
| Wattage | 125 watts |
| Warranty & support | |
| Warranty Description | 3 years |
| Other details | |
| Number of Items | 1 |
| Processor Core Count | 24 |
| Processor Count | 24 |
| Mfr Part Number | BX80768285K |
| Platform | Windows 11 |
| Processor Brand | Intel |
| Processor Number of Concurrent Threads | 24 |
| Processor Series | Core i9 |
| Processor Socket | LGA 1851 |
| Secondary Cache | 36 MB |
| BuiltIn Media | Item |
Other Intel® cpu processors
How it compares
This product against the closest alternatives we track in cpu processors.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Intel® Core™ Ultra 9 Processor 285K 24 coresThis product | 4.6 / 5 | 791 | 4.4 / 5 |
| AMD RYZEN 7 9800X3D 8-CoreAMD | 4.8 / 5 | 6,100 | 4.8 / 5 |
| INTEL CPU Core i5-12400F / 6/12 / 2.5GHz / 6xxChipset / BX8071512400FINTEL | 4.8 / 5 | 3,000 | 4.5 / 5 |
| AMD Ryzen™ 7 9700X 8-CoreAMD | 4.8 / 5 | 2,600 | 4.6 / 5 |
| AMD Ryzen™ 9 9900X 12-CoreAMD | 4.8 / 5 | 1,700 | 4.6 / 5 |
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Questions about the Intel® cpu processors
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Core Ultra 9 285K come with a cooler?
No, Intel sells it without a thermal solution, so a cooler rated for 125W or more needs to be bought separately.
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.