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Intel Core Ultra 7 255H vs Intel Atom C3955
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
More benchmarks
Specifications
At a glance
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| Family | Intel Core Ultra 7 (31) | Intel Atom (108) |
| CPU group | Intel Core Ultra 200H (5) | Intel Atom C3000 (20) |
| Architecture | Arrow Lake H | Denverton |
| Technology | 3 nm | 14 nm |
| Segment | Notebook | Desktop |
| Socket | BGA 2049 | BGA 1310 |
| Predecessor | Intel Core Ultra 7 155H | |
| Successor | Intel Core Ultra X7 358H |
CPU Cores and Base Frequency
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| CPU Cores / Threads | 16 / 16 | 16 / 16 |
| Hyperthreading / SMT | ✗ | ✗ |
| Core architecture | hybrid (big.LITTLE) | normal |
| Core Cluster 1: | 6x Lion Cove 2.00 - 5.10 GHz |
16x 2.10 - 2.40 GHz |
| Core Cluster 2: | 8x Skymont 1.50 - 4.40 GHz |
|
| Core Cluster 3: | 2x Crestmont 0.70 - 2.50 GHz |
|
| L2-Cache | 6.00 MB | 16.00 MB |
| L3-Cache | 24.00 MB | |
| Overclocking | ✗ | ✗ |
Integrated graphics (iGPU)
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| GPU name | Intel Arc 140T | no iGPU |
| GPU frequency | 0.60 - 2.25 GHz | |
| CUs / Shader | 64 / 1024 | / |
| Raytracing | ✓ | ✗ |
| Max. displays | 3 | |
| Max. GPU Memory | 32 GB | |
| Technology | 5 nm | |
| Release date | Q1/2025 |
NPU AI performance
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| AI hardware | Intel® AI Boost | |
| AI specifications | Intel AI Boost (OpenVINO, WindowsML, DirectML, ONNX RT) | |
| NPU + CPU + iGPU | 96 TOPS |
Memory & PCIe
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| Memory | LPDDR5X-8400 (134.4 GB/s) DDR5-6400 (102.4 GB/s) | DDR4-2400 (38.4 GB/s) |
| Max. Memory | 128 GB | 256 GB |
| Memory channels | 2 | 2 |
| ECC | No | Yes |
| PCIe | 5.0 x 28 | 3.0 x 16 |
| PCIe Bandwidth | 110.3 GB/s | 15.8 GB/s |
Thermal Management
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| TDP | 28 W | 32 W |
| TDP (PL2) | 115 W | |
| TDP up | ||
| TDP down | 20 W | |
| T. junction max. | 110 °C | 100 °C |
Technical details
|
Wischen
|
Intel Core Ultra 7 255H | Intel Atom C3955 |
|---|---|---|
| Chip design | Chiplet | Monolithic |
| AES-NI | ✓ | ✓ |
| Operating systems | Windows 11, Linux | Windows 10, Linux |
| Instruction set | x86-64 (64 bit) | x86-64 (64 bit) |
| ISA extensions | SSE4.1, SSE4.2, AVX2 | SSE4.1, SSE4.2 |
| Release date | Q1/2025 | Q3/2017 |
| Release price | 434 $ | |
| Documents | Technical data sheet | Technical data sheet |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of Intel Core Ultra 7 255H is 3.6 stars (239 ratings), while Intel Atom C3955 has received 5.0 stars (1 ratings).
Click on the stars to rate one or both processors.
Most popular CPUs in both categories
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Intel Atom C3955
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Apple M5 Max (18-CPU 32-GPU)
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Apple M2 Ultra (76-GPU)
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Apple M5 Max (18-CPU 40-GPU)
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Apple M3 Ultra (32-CPU 80-GPU)
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Apple M1 Ultra (48-GPU)
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Apple M2 Ultra (60-GPU)
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Intel Core Ultra 7 255H
16C / 16T · 5.10 GHz
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