Product details
The Intel® Core™ Ultra 9 Processor 285K is the flagship of the “Arrow Lake-S” (Core Ultra Series 2) desktop lineup. Released in October 2024, it marks a major architectural pivot for Intel, focusing on significantly improved power efficiency and native AI integration while moving to the new LGA1851 socket.
Notably, this generation marks the end of Hyper-Threading for Intel’s desktop flagships, with every thread now mapped to a physical core.
Core & Clock Speed Specs
| Feature | Specification |
| Total Cores | 24 (8 Performance-cores + 16 Efficient-cores) |
| Total Threads | 24 (Hyper-Threading is not supported) |
| Max Turbo Frequency | 5.70 GHz (via Intel® Thermal Velocity Boost) |
| Intel® Turbo Boost Max 3.0 | 5.60 GHz |
| P-core Base Frequency | 3.70 GHz |
| E-core Base Frequency | 3.20 GHz |
| Intel® Smart Cache (L3) | 36 MB |
| Total L2 Cache | 40 MB |
AI & Graphics
NPU (Neural Processing Unit): Intel® AI Boost (13 TOPS)
Total AI Performance: Up to 36 TOPS (Combined CPU, GPU, and NPU)
Integrated Graphics: Intel® Graphics (4 Xe-cores)
Graphics Max Dynamic Frequency: 2.00 GHz
Power & Thermal
Processor Base Power (TDP): 125 W
Maximum Turbo Power (MTP): 250 W
Max Operating Temperature (Tjunction): 105°C
Lithography: TSMC N3B (Compute Tile)
Memory & Connectivity
Max Memory Size: 192 GB
Memory Support: DDR5-6400 MT/s (Native)
PCI Express Revision: 5.0 and 4.0
Max PCI Express Lanes: 24 total (20 CPU lanes + 4 secondary)
Socket: FCLGA1851 (Requires 800-series motherboards, such as Z890)
