Intel Core i7 1255U vs i5 1235U
45
out of 100
VS
43
out of 100
We compared two 10-core laptop CPUs: the 1.7 GHz Intel Core i7 1255U against the 1.3 GHz i5 1235U. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.
Review
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
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
Key Differences
Advantages of Intel Core i7 1255U
- More powerful Intel Iris Xe Graphics (96EU) integrated graphics: 1.9 vs 1.5 TFLOPS
- 7% higher Turbo Boost frequency (4.7 GHz vs 4.4 GHz)
Test in Benchmarks
Comparing the performance of CPUs across various tasksCinebench
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
| Cinebench 2026 (Single) | - | 400 |
| Cinebench 2026 (Multi) | - | 1046 |
GeekBench v6
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
| File compression | 626.4 MB/sec | 448.4 MB/sec |
| Clang compilation | 49.1 Klines/sec | 24.1 Klines/sec |
| HTML 5 Browser | 179.7 pages/sec | 156 pages/sec |
| PDF Renderer | 201.5 Mpixels/sec | 128.9 Mpixels/sec |
| Text processing | 217.7 pages/sec | 206.3 pages/sec |
| Background blur | 31.6 images/sec | 34.7 images/sec |
| Photo processing | 71.1 images/sec | 54.1 images/sec |
| Ray tracing | 9.8 Mpixels/sec | 10.5 Mpixels/sec |
PassMark
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
| Integer math | 47.7 GOps/sec | 47.4 GOps/sec |
| Floating point math | 32.2 GOps/sec | 37.4 GOps/sec |
| Find prime numbers | 38M Primes/sec | 534M Primes/sec |
| Random string sorting | 16.8M Strings/sec | 16.6M Strings/sec |
| Data encryption | 9.1 GBytes/sec | 9 GBytes/sec |
| Data compression | 145.7 MBytes/sec | 143.4 MBytes/sec |
| Physics | 750 Frames/sec | 649 Frames/sec |
| Extended instructions | 8.2B Matrices/sec | 7.9B Matrices/sec |
Blender
Blender CPU
Performance Per Watt
| Cinebench 2024 / Watt | 29.7 PPW | 24.5 PPW |
| Geekbench 6 Multi / Watt | 477.3 PPW | 424.1 PPW |
| Passmark CPU Mark / Watt | 865.2 PPW | 829.9 PPW |
| Blender / Watt | 5.15 PPW | 5.36 PPW |
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.
Recent User Tests
Intel Core i7 1255U
| Date | Benchmark | Result |
|---|---|---|
| π 2026-02-13 -> Lello75 | Geekbench 6 CPU | 2315 / 7219 |
| π 2025-04-13 (kapple) | Cinebench 2024 | 95 / 446 |
Intel Core i5 1235U
| Date | Benchmark | Result |
|---|---|---|
| π 2026-08-15 (zoetje) | Cinebench 2026 | 400 / 1046 |
| π 2026-08-09 (Jubayer) | Cinebench 2024 | 86 / 393 |
| π 2026-05-06 (TASIN AMIR) | Geekbench 6 CPU | 2191 / 7204 |
| π 2026-03-08 -> samueltails | Geekbench 6 CPU | 2147 / 6050 |
| π 2025-01-13 (sauron269) | Cinebench 2024 | 98 / 368 |
Specifications
Full technical specification of Intel Core i7 1255U and i5 1235UGeneral
| Vendor | Intel | Intel |
| Released | February 23, 2022 | February 23, 2022 |
| Type | Laptop | Laptop |
| Instruction Set | x86-64 | x86-64 |
| Codename | Alder Lake | Alder Lake |
| Model number | i7-1255U | i5-1235U |
| Integrated GPU | Iris Xe Graphics (96EU) | Iris Xe Graphics (80EU) |
| Successor | - Intel Core Ultra 7 255U | - Intel Core Ultra 5 225U |
Intel CPU rating (185th and 199th place)
CPU
| P-Cores | 2 | 2 |
| P-Threads | 4 | 4 |
| Base Frequency (P) | 1.7 GHz | 1.3 GHz |
| Turbo Boost Frequency (P) | 4.7 GHz | 4.4 GHz |
| E-Cores | 8 | 8 |
| E-Threads | 8 | 8 |
| Base Frequency (E) | 1.2 GHz | 0.9 GHz |
| Turbo Boost Frequency (E) | 3.5 GHz | 3.3 GHz |
| Total Cores | 10 | 10 |
| Total Threads | 12 | 12 |
| Bus Frequency | 100 MHz | 100 MHz |
| Multiplier | 17x | 13x |
| 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) | 12-15 W (configurable) |
| Max. Boost TDP (PL2) | 55 W | 55 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 | 1250 MHz | 1200 MHz |
| Shading Units | 768 | 640 |
| TMUs | 48 | 40 |
| ROPs | 24 | 20 |
| Execution Units | 96 | 80 |
| TGP | 15 W | 15 W |
iGPU FLOPS
Memory Support
| Memory Types | - DDR5-4800 - DDR4-3200 - LPDDR5-5200 - LPDDR4x-4267 |
- DDR5-4800 - DDR4-3200 - LPDDR5-5200 - LPDDR4x-4267 |
| Max. Memory Size | 64 GB | 64 GB |
| Memory Channels | 2 | 2 |
| ECC Support | No | No |
Misc
| Official Site | Intel Core i7 1255U official page | Intel Core i5 1235U official page |
| PCI Express Version | 4.0 | 4.0 |
| PCI Express Lanes | 20 | 20 |
Cast your vote
Total votes: 1245
