Home > CPU Comparison > Core Ultra 9 285HX or Core Ultra 7 255HX: what's better?

Intel Core Ultra 9 285HX vs Ultra 7 255HX

82 out of 100
Intel Core Ultra 9 285HX
VS
75 out of 100
Intel Core Ultra 7 255HX
Intel Core Ultra 9 285HX
Intel Core Ultra 7 255HX

We compared two laptop CPUs: the 2.8 GHz Intel Core Ultra 9 285HX with 24-cores against the 2.4 GHz Ultra 7 255HX with 20-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.

  1. Review
  2. Differences
  3. Performance
  4. Specs
  5. Comments

Review

General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
Integrated Graphics
iGPU capabilities for gaming and 3D-intensive tasks
NanoReview Final Score
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
πŸ”Œ Usage Scenario:

Key Differences

What are the key differences between 255HX and 285HX
Advantages of Intel Core Ultra 9 285HX
  • Has 4 more physical cores
  • Has 6 MB larger L3 cache size, helping fully utilize a high-end GPU in gaming
  • 6% higher Turbo Boost frequency (5.5 GHz vs 5.2 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Core Ultra 9 285HX
vs
Core Ultra 7 255HX

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
Cinebench Scores (11th and 47th place)
Submit your benchmark results

GeekBench v6

The new version of this benchmark emulates common operations often used in real-world apps
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
File compression 1540 MB/sec 1140 MB/sec
Clang compilation 227 Klines/sec 149.8 Klines/sec
HTML 5 Browser 483.8 pages/sec 312.2 pages/sec
PDF Renderer 592.1 Mpixels/sec 423.9 Mpixels/sec
Text processing 350.1 pages/sec 335.6 pages/sec
Background blur 90.1 images/sec 64.1 images/sec
Photo processing 161.3 images/sec 111.8 images/sec
Ray tracing 50.5 Mpixels/sec 31.1 Mpixels/sec
Sources: GeekBench [1], [2]

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Integer math 154.3 GOps/sec 127 GOps/sec
Floating point math 193.9 GOps/sec 160.3 GOps/sec
Find prime numbers 457M Primes/sec 400M Primes/sec
Random string sorting 76.7M Strings/sec 62.4M Strings/sec
Data encryption 48.3 GBytes/sec 39.4 GBytes/sec
Data compression 628.2 MBytes/sec 513.6 MBytes/sec
Physics 3444 Frames/sec 2916 Frames/sec
Extended instructions 48.8B Matrices/sec 41.1B Matrices/sec
Sources: PassMark [3], [4] – 821 & 976 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 40.7 PPW 32 PPW
Geekbench 6 Multi / Watt 382.6 PPW 328 PPW
Passmark CPU Mark / Watt 1028.2 PPW 874.8 PPW
Blender / Watt 9.47 PPW 7.11 PPW
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.

Recent User Tests

The latest benchmark tests that have been submitted by users
Intel Core Ultra 9 285HX
DateBenchmarkResult
πŸ“˜ 2025-04-19 (bikerboy80)Cinebench 2024126 / 2240
πŸ“˜ 2025-04-19 (bikerboy85)Cinebench 2024126 / 2240
Add View all (2)
Intel Core Ultra 7 255HX
DateBenchmarkResult
πŸ“˜ 2026-06-05 (Levi)GeekBench2907 / 17742
πŸ“˜ 2025-12-25 (Junebug)Cinebench 2024131 / 1759
πŸ“˜ 2025-12-17 (balihardik009)Cinebench 2024131 / 1820
πŸ“˜ 2025-11-26 (Verbickisd)Cinebench 2024125 / 1666
πŸ“˜ 2025-11-24 (Abhi)GeekBench2823 / 17264
Add View all (5)

Specifications

Full technical specification of Intel Core Ultra 9 285HX and Ultra 7 255HX

General

Vendor Intel Intel
Released January 6, 2025 January 6, 2025
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Arrow Lake Arrow Lake
Model number 285HX 255HX
Integrated GPU Arc Graphics (4-Cores) Arc Graphics (4-Cores)
Rival Equivalent - AMD Ryzen 9 9955HX - AMD Ryzen AI Max Pro 380
Intel CPU rating (12th and 29th place)

CPU

Performance Cores
P-Cores 8 8
P-Threads 8 8
Base Frequency (P) 2.8 GHz 2.4 GHz
Turbo Boost Frequency (P) 5.5 GHz 5.2 GHz
Efficient Cores
E-Cores 16 12
E-Threads 16 12
Base Frequency (E) 2.1 GHz 1.8 GHz
Turbo Boost Frequency (E) 4.6 GHz 4.5 GHz
Total
Total Cores 24 20
Total Threads 24 20
Bus Frequency 100 MHz 100 MHz
Multiplier 28x 24x
L1 Cache 192K (per core) 192K (per core)
L2 Cache 2MB (per core) 2MB (per core)
L3 Cache 36MB (shared) 30MB (shared)
Unlocked Multiplier Yes Yes

Package

Fabrication Process 3 nm 3 nm
TDP (PL1) 45-55 W (configurable) 45-55 W (configurable)
Max. Boost TDP (PL2) 160 W 160 W
Socket FCBGA-2114 FCBGA-2114
Peak Temperature 105Β°C 105Β°C
Laptop processors ranking (18th and 33rd place)

iGPU

Integrated Graphics Arc Graphics (4-Cores) Arc Graphics (4-Cores)
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 2000 MHz 1850 MHz
Shading Units 512 512
TMUs 32 32
ROPs 16 16
Execution Units 64 64
TGP 14 W 14 W
iGPU FLOPS
Core Ultra 9 285HX +5%
2 TFLOPS
Core Ultra 7 255HX
1.9 TFLOPS
See: Intel Arc iGPU (4-Cores) benchmarks

Memory Support

Memory Types - DDR5-6400 - DDR5-6400
Max. Memory Size 256 GB 256 GB
Memory Channels 2 2
Max. Memory Bandwidth 102.4 GB/s 102.4 GB/s
ECC Support Yes Yes

Misc

Official Site Intel Core Ultra 9 285HX official page Intel Core Ultra 7 255HX official page
PCI Express Version 5.0 5.0
PCI Express Lanes 24 24

Cast your vote

Choose between two processors
6 (26.1%)
17 (73.9%)
Total votes: 23

Competitors

1. Intel Core Ultra 7 255HX vs Intel Core Ultra 9 275HX
2. Intel Core Ultra 7 255HX vs AMD Ryzen 7 260
3. Intel Core Ultra 7 255HX vs AMD Ryzen AI 9 HX 370 (1)
4. Intel Core Ultra 7 255HX vs Intel Core Ultra 7 155H
5. Intel Core Ultra 7 255HX vs Intel Core Ultra 7 265HX
6. Intel Core Ultra 9 285HX vs Intel Core Ultra 9 275HX
7. Intel Core Ultra 9 285HX vs Intel Core i9 14900HX (4)
8. Intel Core Ultra 9 285HX vs AMD Ryzen 9 9955HX3D (12)
9. Intel Core Ultra 9 285HX vs AMD Ryzen 9 9955HX
10. Intel Core Ultra 9 285HX vs Intel Core Ultra 9 285H
Compare other CPUs (460+)

Comments

So which CPU will you choose: Intel Core Ultra 7 255HX or Ultra 9 285HX?
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