Home > CPU Comparison > Core Ultra 7 255U or Core Ultra 7 155U: what's better?

Intel Core Ultra 7 255U vs Ultra 7 155U

54 out of 100
Intel Core Ultra 7 255U
VS
50 out of 100
Intel Core Ultra 7 155U
Intel Core Ultra 7 255U
Intel Core Ultra 7 155U

We compared two 12-core laptop CPUs: the 2.0 GHz Intel Core Ultra 7 255U against the 1.7 GHz Ultra 7 155U. 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 155U and 255U
Advantages of Intel Core Ultra 7 255U
  • More modern manufacturing process – 3 versus 7 nanometers
  • Newer - released 1 year and 1 month later
  • Supports up to 128 GB LPDDR5-8400 RAM
  • 8% higher Turbo Boost frequency (5.2 GHz vs 4.8 GHz)

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Core Ultra 7 255U
vs
Core Ultra 7 155U

Cinebench

Reputable cross-platform benchmark for high-performance processors
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
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 999.4 MB/sec 1000 MB/sec
Clang compilation 75.6 Klines/sec 62.5 Klines/sec
HTML 5 Browser 267.7 pages/sec 241.5 pages/sec
PDF Renderer 334.8 Mpixels/sec 264.8 Mpixels/sec
Text processing 240.5 pages/sec 233.2 pages/sec
Background blur 46.6 images/sec 39 images/sec
Photo processing 80.8 images/sec 97.3 images/sec
Ray tracing 12 Mpixels/sec 13.2 Mpixels/sec
Sources: GeekBench [1], [2] – 21 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Integer math 65.3 GOps/sec 56.8 GOps/sec
Floating point math 45.7 GOps/sec 39.6 GOps/sec
Find prime numbers 63M Primes/sec 65M Primes/sec
Random string sorting 21.3M Strings/sec 19.5M Strings/sec
Data encryption 12.4 GBytes/sec 11.2 GBytes/sec
Data compression 196.1 MBytes/sec 174.6 MBytes/sec
Physics 1137 Frames/sec 1076 Frames/sec
Extended instructions 10.8B Matrices/sec 9.7B Matrices/sec
Sources: PassMark [3], [4] – 649 & 1857 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 34.3 PPW 36.6 PPW
Geekbench 6 Multi / Watt 670.5 PPW 632.4 PPW
Passmark CPU Mark / Watt 1191.6 PPW 1076.1 PPW
Blender / Watt - 6.65 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 7 255U
No benchmark results yet
Add
Intel Core Ultra 7 155U
DateBenchmarkResult
πŸ“˜ 2025-03-17 (KNOTs_007)Cinebench 2024101 / 997
πŸ“˜ 2025-02-14 (hanswurst)Cinebench 202490 / 348
πŸ“˜ 2024-07-18 (Makikou)Cinebench 202494 / 333
Add View all (3)

Specifications

Full technical specification of Intel Core Ultra 7 255U and Ultra 7 155U

General

Vendor Intel Intel
Released January 6, 2025 December 14, 2023
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Arrow Lake Meteor Lake
Model number 255U 155U
Integrated GPU Arc Graphics (4-Cores) Arc Graphics (4-Cores)
Rival Equivalent - - AMD Ryzen 7 8840U
Successor - - Intel Core Ultra 7 255U
Intel CPU rating (120th and 149th place)

CPU

Performance Cores
P-Cores 2 2
P-Threads 4 4
Base Frequency (P) 2.0 GHz 1.7 GHz
Turbo Boost Frequency (P) 5.2 GHz 4.8 GHz
Efficient Cores
E-Cores 10 10
E-Threads 10 10
Base Frequency (E) 1.7 GHz 1.2 GHz
Turbo Boost Frequency (E) 4.2 GHz 3.8 GHz
Total
Total Cores 12 12
Total Threads 14 14
Bus Frequency 100 MHz 100 MHz
Multiplier 20x 17x
L1 Cache 112K (per core) 112K (per core)
L2 Cache 2MB (per core) 2MB (per core)
L3 Cache 12MB (shared) 12MB (shared)
Unlocked Multiplier No No

Package

Fabrication Process 3 nm 7 nm
TDP (PL1) 12-15 W (configurable) 12-15 W (configurable)
Max. Boost TDP (PL2) 57 W 57 W
Socket FCBGA-2049 FCBGA-2049
Peak Temperature 110Β°C 110Β°C
Laptop processors ranking (159th and 197th place)

iGPU

Integrated Graphics Arc Graphics (4-Cores) Arc Graphics (4-Cores)
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 2100 MHz 1950 MHz
Shading Units 512 512
TMUs 32 32
ROPs 16 16
Execution Units 64 64
TGP 14 W 14 W
iGPU FLOPS
Core Ultra 7 255U +10%
2.2 TFLOPS
Core Ultra 7 155U
2 TFLOPS
See: Intel Arc iGPU (4-Cores) benchmarks

Memory Support

Memory Types - LPDDR5-8400
- LPDDR5x-8400
- DDR5-6400		 - LPDDR5-7467
- LPDDR5x-7467
- DDR5-5600
Max. Memory Size 128 GB 96 GB
Memory Channels 2 2
Max. Memory Bandwidth - 89.6 GB/s
ECC Support No No

Misc

Official Site Intel Core Ultra 7 255U official page Intel Core Ultra 7 155U official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
11 (78.6%)
3 (21.4%)
Total votes: 14

Competitors

1. Intel Core Ultra 7 155U vs Intel Core Ultra 7 155H (6)
2. Intel Core Ultra 7 155U vs Intel Core i7 1360P
3. Intel Core Ultra 7 155U vs Intel Core Ultra 7 165U
4. Intel Core Ultra 7 155U vs AMD Ryzen 7 8840U (3)
5. Intel Core Ultra 7 155U vs Intel Core Ultra 5 125U (5)
6. Intel Core Ultra 7 255U vs Intel Core Ultra 7 255H
7. Intel Core Ultra 7 255U vs Intel Core Ultra 7 165U
8. Intel Core Ultra 7 255U vs Intel Core 7 150U
9. Intel Core Ultra 7 255U vs Intel Core Ultra 7 265U
10. Intel Core Ultra 7 255U vs Intel Core i7 1355U
Compare other CPUs (460+)

Comments

So which CPU will you choose: Intel Core Ultra 7 155U or Ultra 7 255U?
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