Home > CPU Comparison > Core i7 1355U or Core i3 1215U: what's better?

Intel Core i7 1355U vs i3 1215U

49 out of 100
Intel Core i7 1355U
VS
42 out of 100
Intel Core i3 1215U
Intel Core i7 1355U
Intel Core i3 1215U

We compared two laptop CPUs: the 1.7 GHz Intel Core i7 1355U with 10-cores against the 1.2 GHz i3 1215U with 6-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.
๐Ÿ”Œ Usage Scenario:

Key Differences

What are the key differences between 1215U and 1355U
Advantages of Intel Core i7 1355U
  • More powerful Intel Iris Xe Graphics (96EU) integrated graphics: 2 vs 1.1 TFLOPS
  • Has 4 more physical cores
  • Supports up to 96 GB DDR5-5200 RAM
  • Newer - released 10 months later
  • Has 2 MB larger L3 cache size
  • 14% higher Turbo Boost frequency (5 GHz vs 4.4 GHz)
  • 13% faster in a single-core Geekbench v6 test - 2466 vs 2184 points

Test in Benchmarks

Comparing the performance of CPUs across various tasks
CPU:
Core i7 1355U
vs
Core i3 1215U

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 +13%
2466
Core i3 1215U
2184
Geekbench 6 (Multi-Core)
Core i7 1355U +33%
7553
Core i3 1215U
5662
File compression 519.7 MB/sec 356.7 MB/sec
Clang compilation 58.7 Klines/sec 45.1 Klines/sec
HTML 5 Browser 159 pages/sec 117.1 pages/sec
PDF Renderer 219.7 Mpixels/sec 180.5 Mpixels/sec
Text processing 221.5 pages/sec 224.7 pages/sec
Background blur 33.4 images/sec 18.9 images/sec
Photo processing 64.2 images/sec 54.2 images/sec
Ray tracing 12.5 Mpixels/sec 9.45 Mpixels/sec
Sources: GeekBench [1], [2] โ€“ 653 & 1106 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 +37%
13850
Core i3 1215U
10106
Integer math 50.4 GOps/sec 34.4 GOps/sec
Floating point math 33.9 GOps/sec 24.6 GOps/sec
Find prime numbers 48M Primes/sec 30M Primes/sec
Random string sorting 17.2M Strings/sec 12.7M Strings/sec
Data encryption 9.6 GBytes/sec 6.8 GBytes/sec
Data compression 152.3 MBytes/sec 113.1 MBytes/sec
Physics 844 Frames/sec 546 Frames/sec
Extended instructions 8.5B Matrices/sec 6.7B Matrices/sec
Sources: PassMark [3], [4] โ€“ 3976 & 3915 samples

Blender

3D rendering test that measures CPU performance in 3D modeling tasks (uses all cores)
Blender CPU
Core i7 1355U +61%
94.87
Core i3 1215U
58.9

Performance Per Watt

Shows the score you get per each watt of PL1 TDP
Cinebench 2024 / Watt 33.9 PPW 18.9 PPW
Geekbench 6 Multi / Watt 503.5 PPW 377.5 PPW
Passmark CPU Mark / Watt 923.3 PPW 673.7 PPW
Blender / Watt 6.32 PPW 3.93 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
๐Ÿ“˜ 2026-04-28 (Linode)Geekbench 6 CPU2435 / 7355
Add View all (1)
Intel Core i3 1215U
DateBenchmarkResult
๐Ÿ“˜ 2025-04-11 (Shanmukh)Geekbench 6 CPU2126 / 6248
๐Ÿ“˜ 2023-11-06 (goryn81)Cinebench 202489 / 283
Add View all (2)

Specifications

Full technical specification of Intel Core i7 1355U and i3 1215U

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 i3-1215U
Integrated GPU Iris Xe Graphics (96EU) UHD Graphics (64EU)
Successor - Intel Core Ultra 7 255U - Intel Core 3 100U
Intel CPU rating (#159th place)

CPU

Performance Cores
P-Cores 2 2
P-Threads 4 4
Base Frequency (P) 1.7 GHz 1.2 GHz
Turbo Boost Frequency (P) 5 GHz 4.4 GHz
Efficient Cores
E-Cores 8 4
E-Threads 8 4
Base Frequency (E) 1.2 GHz 0.9 GHz
Turbo Boost Frequency (E) 3.7 GHz 3.3 GHz
Total
Total Cores 10 6
Total Threads 12 8
Bus Frequency 100 MHz 100 MHz
Multiplier 17x 12x
L1 Cache 80K (per core) 80K (per core)
L2 Cache 1280K (per core) 1280K (per core)
L3 Cache 12MB (shared) 10MB (shared)
Unlocked Multiplier No No

Package

Fabrication Process 10 nm 10 nm
TDP (PL1) 12-15 W (configurable) 12-15 W (configurable)
Max. Boost TDP (PL2) 55 W 55 W
Socket BGA-1744 BGA-1744
Peak Temperature 100ยฐC 100ยฐC

iGPU

Integrated Graphics Intel Iris Xe Graphics (96EU) Intel UHD Graphics (64EU)
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1300 MHz 1100 MHz
Shading Units 768 512
TMUs 48 32
ROPs 24 16
Execution Units 96 64
TGP 15 W 15 W
iGPU FLOPS
Core i7 1355U +82%
2 TFLOPS
Core i3 1215U
1.1 TFLOPS
More info: UHD Graphics (64 EU) compared to Iris 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 i3 1215U official page
PCI Express Version 4.0 4.0
PCI Express Lanes 20 20

Cast your vote

Choose between two processors
10 (33.3%)
20 (66.7%)
Total votes: 30

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6. Intel Core i7 1355U vs Intel Core Ultra 7 155U (1)
7. Intel Core i7 1355U vs Intel Core i5 1335U
8. Intel Core i7 1355U vs AMD Ryzen 7 7730U
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10. Intel Core i7 1355U vs AMD Ryzen 5 7530U
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Comments

So which CPU will you choose: Intel Core i3 1215U or i7 1355U?
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