Home > CPU Comparison > Core i7 1355U or Core i5 1240P: what's better?

Intel Core i7 1355U vs i5 1240P

49 out of 100
Intel Core i7 1355U
VS
45 out of 100
Intel Core i5 1240P
Intel Core i7 1355U
Intel Core i5 1240P

We compared two laptop CPUs: the 1.7 GHz Intel Core i7 1355U with 10-cores against the 1.7 GHz i5 1240P with 12-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
DeviceFacts 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 1240P and 1355U
Advantages of Intel Core i7 1355U
  • Supports up to 96 GB DDR5-5200 RAM
  • Newer - released 10 months later
  • More powerful Intel Iris Xe Graphics (96EU) integrated graphics: 2 vs 1.7 TFLOPS
  • 14% higher Turbo Boost frequency (5 GHz vs 4.4 GHz)
  • 12% faster in a single-core Geekbench v6 test - 2466 vs 2201 points
Advantages of Intel Core i5 1240P
  • Has 2 more physical cores

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Core i7 1355U
vs
Core i5 1240P

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)
Core i7 1355U +12%
2466
Core i5 1240P
2201
Geekbench 6 (Multi-Core)
Core i7 1355U
7553
Core i5 1240P +14%
8643
File compression 519.7 MB/sec 629 MB/sec
Clang compilation 58.7 Klines/sec 61.4 Klines/sec
HTML 5 Browser 159 pages/sec 212.7 pages/sec
PDF Renderer 219.7 Mpixels/sec 278.2 Mpixels/sec
Text processing 221.5 pages/sec 196.2 pages/sec
Background blur 33.4 images/sec 39 images/sec
Photo processing 64.2 images/sec 76.8 images/sec
Ray tracing 12.5 Mpixels/sec 13.8 Mpixels/sec
Sources: GeekBench [1], [2] – 653 & 536 samples

PassMark

Synthetic test that focuses on raw computational performance for low-level functions
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Core i7 1355U
13850
Core i5 1240P +14%
15763
Integer math 50.4 GOps/sec 60.9 GOps/sec
Floating point math 33.9 GOps/sec 41.8 GOps/sec
Find prime numbers 48M Primes/sec 44M Primes/sec
Random string sorting 17.2M Strings/sec 20.7M Strings/sec
Data encryption 9.6 GBytes/sec 10.9 GBytes/sec
Data compression 152.3 MBytes/sec 183.4 MBytes/sec
Physics 844 Frames/sec 859 Frames/sec
Extended instructions 8.5B Matrices/sec 10.6B Matrices/sec
Sources: PassMark [3], [4] – 3976 & 2088 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Core i7 1355U
94.87
Core i5 1240P +16%
110.19

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 33.9 PPW 17.1 PPW
Geekbench 6 Multi / Watt 503.5 PPW 308.7 PPW
Passmark CPU Mark / Watt 923.3 PPW 563 PPW
Blender / Watt 6.32 PPW 3.94 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 i7 1355U
DateBenchmarkResult
πŸ“˜ 2026-04-28 (Linode)Geekbench 6 CPU2435 / 7355
Add View all (1)
Intel Core i5 1240P
DateBenchmarkResult
πŸ“˜ 2025-11-19 (Aki)Geekbench 6 CPU2214 / 9632
πŸ“˜ 2025-11-19 (Aki)Cinebench 202498 / 523
πŸ“˜ 2025-11-16 (tg)Cinebench 202480 / 480
πŸ“˜ 2025-02-15 (Piyush)Cinebench 202465 / 88
Add View all (4)

Specifications

Full technical specification of Intel Core i7 1355U and i5 1240P

General

Vendor Intel Intel
Released January 3, 2023 February 23, 2022
Type Laptop Laptop
Instruction Set x86-64 x86-64
Codename Raptor Lake Alder Lake
Model number i7-1355U i5-1240P
Integrated GPU Iris Xe Graphics (96EU) Iris Xe Graphics (80EU)
Rival Equivalent - - AMD Ryzen 5 5500U
Successor - Intel Core Ultra 7 255U - Intel Core i5 1340P
Intel CPU rating (159th and 186th place)

CPU

Performance Cores
P-Cores 2 4
P-Threads 4 8
Base Frequency (P) 1.7 GHz 1.7 GHz
Turbo Boost Frequency (P) 5 GHz 4.4 GHz
Efficient Cores
E-Cores 8 8
E-Threads 8 8
Base Frequency (E) 1.2 GHz 1.2 GHz
Turbo Boost Frequency (E) 3.7 GHz 3.3 GHz
Total
Total Cores 10 12
Total Threads 12 16
Bus Frequency 100 MHz 100 MHz
Multiplier 17x 17x
L1 Cache 80K (per core) 80K (per core)
L2 Cache 1280K (per core) 1280K (per core)
L3 Cache 12MB (shared) 12MB (shared)
Unlocked Multiplier No No

Package

Fabrication Process 10 nm 10 nm
TDP (PL1) 12-15 W (configurable) 20-28 W (configurable)
Max. Boost TDP (PL2) 55 W 64 W
Socket BGA-1744 BGA-1744
Peak Temperature 100Β°C 100Β°C

iGPU

Integrated Graphics Intel Iris Xe Graphics (96EU) Intel Iris Xe Graphics (80EU)
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1300 MHz 1300 MHz
Shading Units 768 640
TMUs 48 40
ROPs 24 20
Execution Units 96 80
TGP 15 W 15 W
iGPU FLOPS
Core i7 1355U +18%
2 TFLOPS
Core i5 1240P
1.7 TFLOPS
More info: Iris Xe Graphics G7 (80EU) compared to Xe Graphics G7 (96EU)

Memory Support

Memory Types - DDR5-5200
- DDR4-3200
- LPDDR5-6400
- LPDDR5x-6400
- LPDDR4x-4267		 - DDR5-4800
- DDR4-3200
- LPDDR5-5200
- LPDDR4x-4267
Max. Memory Size 96 GB 64 GB
Memory Channels 2 2
ECC Support No No

Misc

Official Site Intel Core i7 1355U official page Intel Core i5 1240P official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
32 (47.1%)
36 (52.9%)
Total votes: 68

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6. Intel Core i7 1355U vs Intel Core i5 1335U
7. Intel Core i7 1355U vs AMD Ryzen 5 7530U
8. Intel Core i5 1240P vs Intel Core i5 12500H (2)
9. Intel Core i5 1240P vs AMD Ryzen 5 7530U
10. Intel Core i5 1240P vs Intel Core i5 12450H (6)
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Comments

So which CPU will you choose: Intel Core i5 1240P or i7 1355U?
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