Intel® Core™ Ultra 9 285HX

The Intel Core Ultra 9 285HX is a laptop processor with a hybrid 24-core layout (8 performance cores + 16 efficiency cores) and 24 threads, built on the Arrow Lake architecture. It launched in Jan 2025. Clocks run from 2.8 GHz base to 5.5 GHz boost. A 36-MB L3 cache backs the cores (3.3 MB per core). It addresses DDR5 memory up to 256 GB across 2 channels. The chip drops into the FCBGA2114 socket and exposes PCIe 5.0 (24 lanes). Rated TDP is 55 W. Notable platform capabilities: Gaussian Neural Accelerator, Extended Page Tables (EPT), Control-flow Enforcement (CET).

The Intel Core Ultra 9 285HX scores 4,627 in single-core performance and 57,315 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 16,285 for overall performance, 43,733 for productivity performance, 39,852 for creator performance, 73,077 for engineering performance and 28,210 for gaming performance. Its multi-core throughput works out to 2,388 per core, 2,388 per thread and 1,042 per watt. Its computed efficiency index is 2,196. Its performance index is 202, so its overall performance is 102% above the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the Intel Core Ultra 9 285HX scores 155,342 in integer math, 195,521 in floating-point math, 634,254 in compression, 48,750 in cryptography, 3,503 in physics simulation, 49,358 in vector SIMD, 462 in the prime sieve and 77,523 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 164% above in integer math, 326% above in floating-point math, 178% above in compression, 324% above in cryptography, 221% above in physics simulation, 218% above in vector SIMD, 590% above in the prime sieve and 242% above in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The Intel Core Ultra 9 285HX has 24 physical cores and runs 24 logical threads. It uses a hybrid layout of 8 performance cores and 16 efficiency cores. It does not support simultaneous multithreading, so its thread count equals its core count. It runs at a base clock of 2.80 GHz and boosts up to 5.50 GHz.

The Intel Core Ultra 9 285HX is a laptop processor, belongs to the Intel Core Ultra 9 family, uses the Arrow Lake architecture, carries the codename Arrow Lake and is manufactured on a 3 nm process. It launched in Jan 2025.

The Intel Core Ultra 9 285HX has 2.38 MB of L1 cache, 40 MB of L2 cache and 36 MB of L3 cache. That adds up to about 78.4 MB of cache, or 3.27 MB per core.

The Intel Core Ultra 9 285HX has a 3-level cache hierarchy: L1 at 2.4 MB, L2 at 40 MB and L3 at 36 MB. L2 is the largest level and makes up about 51% of the cache listed here.

The Intel Core Ultra 9 285HX supports DDR5 memory, addresses up to 256 GB of memory, uses 2 memory channels, runs memory at up to 7,200 MT/s and delivers up to 115.2 GB/s of memory bandwidth. It does not support DDR4 and LPDDR memory. It supports ECC memory.

The Intel Core Ultra 9 285HX includes integrated graphics (Intel Graphics) and clocks the graphics up to 2.00 GHz.

The Intel Core Ultra 9 285HX uses the FCBGA2114 socket, supports PCI Express 5.0 and provides up to 24 PCIe lanes.

The Intel Core Ultra 9 285HX has a rated TDP of 55 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

The Intel Core Ultra 9 285HX is also identified by the model number 285HX and the processor number 285HX.

Feex has recorded 67% of the specifications it tracks for the Intel Core Ultra 9 285HX. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L2 Cache (per Core) and L4 Cache. Graphics: Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package and Package Size. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: SKU and Part Number.

Processors that use the same FCBGA2114 socket as the Intel Core Ultra 9 285HX and have the closest multi-core scores in the Feex database include Intel Core Ultra 9 275HX, Intel Core Ultra 9 290K Plus, Intel Core Ultra 9 290HX Plus, Intel Core Ultra 7 255HX and Intel Core Ultra 7 270HX+.