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Intel Core Ultra 9 285K Tray Processor

Intel Core Ultra 9 285K is a desktop processor with 24 cores (8 Performance-cores and 16 Efficient-cores) and 24 threads, built on the Arrow Lake architecture for the FCLGA1851 socket. It reaches up to 5.7 GHz Max Turbo Frequency, supports DDR5 memory up to 6400 MT/s and up to 256GB capacity, and includes Intel Graphics plus an Intel AI Boost NPU. This is a Tray processor, meaning it ships without a cooler. Available at Alfrensia for 30,499 EGP.

⚡ Engineering Highlights at a Glance:

• 24 Cores / 24 Threads: 8 Performance-cores and 16 Efficient-cores for heavy multitasking and content creation workloads.
• Up to 5.7 GHz Max Turbo: Intel Thermal Velocity Boost and Turbo Boost Max Technology 3.0 push single-core clocks to 5.7 GHz.
• FCLGA1851 Socket: Requires an Intel 800-series chipset motherboard (Z890, B860, H810) for Core Ultra Series 2 processors.
• DDR5 Support: Dual-channel DDR5 up to 6400 MT/s, with a maximum memory capacity of 256GB.
• PCIe 5.0 and 4.0: Up to 24 PCI Express lanes with configurations up to 1×16+2×4, 2×8+2×4, or 1×8+4×4.
• Intel Graphics and AI Boost NPU: Integrated graphics with DisplayPort 2.1 and HDMI 2.1 outputs, plus a 13 TOPS NPU for AI acceleration.
• Tray Processor: Ships without a cooler; pair with a high-end air cooler or 240mm+ AIO for sustained loads.

Who is the Core Ultra 9 285K For?

🎬 Content Creators & Video EditorsYou render video, run 3D workflows, or multitask across heavy applications. The 24 cores and DDR5 support handle sustained multi-threaded work without dropping frames.

🤖 AI Workstation BuildersYou run local AI models or use AI-accelerated software. The Intel AI Boost NPU (13 TOPS) and 36 overall Peak TOPS (Int8) offload AI tasks while the CPU handles the rest.

🖥️ High-End Productivity UsersYou build a workstation for engineering, data analysis, or software development. 24 threads and 256GB memory support handle virtual machines and large datasets.

Expert Advice & Build Considerations

Motherboard and Socket Compatibility

The 285K uses the FCLGA1851 socket, so it requires an Intel 800-series chipset motherboard such as Z890, B860, or H810. It does not fit LGA1700 boards from the 12th-14th Gen era. Verify your motherboard’s CPU support list before purchase, and check that the board’s BIOS version supports Core Ultra Series 2 processors.

Cooling Is Mandatory

This is a Tray processor with no included cooler [citation:1][citation:5]. Intel specifies a PCG 2020A thermal solution for this chip. The 285K draws substantially more power than mid-range CPUs under sustained loads, so pair it with a high-end air cooler or a 240mm or larger AIO. Check your case’s CPU cooler height clearance and radiator mounting support before buying. Without adequate cooling, the processor will throttle and lose performance.

Memory and Power Delivery

Install DDR5 memory in matched pairs for dual-channel operation. The 285K officially supports up to DDR5 6400 MT/s; higher speeds may work with motherboard XMP/EXPO profiles but are not guaranteed. The maximum memory capacity is 256GB, which suits workstation use. Check your motherboard’s power delivery (VRM) design and PSU wattage against the CPU’s power draw, especially if you pair it with a high-end graphics card.

Technical Specifications

Model Name	Intel Core Ultra 9 Processor 285K
Brand	Intel
SKU / MPN	285K TRAY
EAN / UPC	314851010
Product Collection	Intel Core Ultra Processors (Series 2)
Code Name	Arrow Lake
Socket	FCLGA1851
Total Cores	24 (8 Performance-cores + 16 Efficient-cores)
Total Threads	24
Max Turbo Frequency	5.7 GHz
Performance-core Max Turbo	5.5 GHz
Efficient-core Max Turbo	4.6 GHz
Memory Support	DDR5 up to 6400 MT/s, 2 channels, max 256GB [citation:3]
Integrated Graphics	Intel Graphics, 4 Xe-cores, 2 GHz max dynamic frequency
NPU	Intel AI Boost, 13 TOPS (Int8)
Overall Peak TOPS (Int8)	36
PCI Express	5.0 and 4.0, up to 24 lanes
Thermal Solution	PCG 2020A (cooler not included)
Max Operating Temperature	105 °C
Package Size	45 mm x 37.5 mm
Form Factor	Tray (no cooler, no retail box)
Warranty	3 Years Local Alfrensia Warranty

Expert Recommendation: Building with the Core Ultra 9 285K

Pair the 285K with a Z890 motherboard for the fullest feature set, including PCIe 5.0 lanes and robust VRM for sustained loads. B860 boards also work if you do not need the extra I/O, but check the VRM design before pairing it with a 24-core chip under heavy load.

Because this is a Tray processor, budget for a separate cooler [citation:1][citation:5]. A high-end air cooler or a 240mm/360mm AIO is appropriate for the 285K’s power draw. Check your case’s CPU cooler height limit or radiator mounting support before ordering. Without adequate cooling, the CPU will throttle under sustained multi-threaded workloads.

Install DDR5 memory in matched pairs for dual-channel operation. Enable XMP or EXPO in the BIOS if your kit is rated above 6400 MT/s, and verify stability with a memory test. For workstation use, 64GB or 128GB is a practical starting point; the platform supports up to 256GB.

Update the motherboard BIOS to the latest version before installing the CPU, because early 800-series boards may ship with BIOS revisions that need updates for full Core Ultra Series 2 support. Also, confirm your PSU wattage with a power supply calculator that includes the 285K’s sustained load and your GPU, and leave headroom for transient spikes.

Frequently Asked Questions

Does the Intel Core Ultra 9 285K include a CPU cooler?

No. This is a Tray processor, and Intel does not include a cooler with K-series Core Ultra desktop processors [citation:1][citation:5]. You must purchase a separate cooler. Intel specifies a PCG 2020A thermal solution for this chip, and a high-end air cooler or 240mm+ AIO is recommended for sustained loads.

Which motherboards are compatible with the 285K?

The 285K uses the FCLGA1851 socket, so it requires an Intel 800-series chipset motherboard (Z890, B860, or H810). It does not fit LGA1700 boards. Verify the motherboard’s CPU support list and BIOS version before purchase, as early boards may need a BIOS update for Core Ultra Series 2.

What memory does the 285K support?

It supports dual-channel DDR5 memory up to 6400 MT/s and up to 256GB total capacity [citation:3]. Higher speeds may work with motherboard XMP/EXPO profiles but are not guaranteed by Intel. Install memory in matched pairs for dual-channel operation.

What is the difference between a Tray and a Box processor?

A Tray processor ships without retail packaging and without a cooler; it is intended for system builders and OEMs. A Box processor includes retail packaging and, for non-K models, a stock cooler. The 285K is a K-series chip, so even Box versions do not include a cooler. Tray units carry the same Alfrensia warranty but arrive without the retail box.

What is the Intel AI Boost NPU used for?

The Intel AI Boost NPU is a dedicated AI accelerator with 13 TOPS (Int8). It handles AI workloads such as Windows Studio Effects, local AI model inference, and supported creative applications, offloading these tasks from the CPU and GPU to improve efficiency. The processor’s overall Peak TOPS (Int8) is 36.