Quick Answer
The Intel Core Ultra 7 255U and Intel Core i7-1355U are both laptop processors designed for thin-and-light notebooks. The Core Ultra 7 255U is a newer generation chip featuring a hybrid architecture with dedicated AI acceleration (NPU), while the Core i7-1355U is from the previous generation and focuses on traditional CPU performance and efficiency.
Intel Core Ultra 7 255U vs Intel Core i7 1355U: Full Comparison
Introduction
Choosing a laptop often involves understanding the processor at its heart. This comparison examines two notable U-series mobile CPUs from Intel: the newer Core Ultra 7 255U from the “Meteor Lake” generation and the Core i7-1355U from the prior “Raptor Lake” generation. While both are aimed at efficient, portable laptops, they represent different architectural philosophies. This analysis will break down their specifications, performance characteristics, and key features to help clarify their roles in the market.
Architecture and Process Technology
The fundamental difference between these processors lies in their underlying design and manufacturing.
- Core Ultra 7 255U: This chip is built on Intel’s new disaggregated “Meteor Lake” architecture. It uses a tile-based design manufactured on different process nodes, including Intel 4 for the compute tile. A key introduction is the integrated Neural Processing Unit (NPU) for dedicated AI task acceleration.
- Core i7-1355U: This processor is based on the older “Raptor Lake” architecture, which is a more traditional monolithic design. It is manufactured using an enhanced version of Intel’s 10nm process (Intel 7). It lacks a dedicated NPU, relying on the CPU and integrated GPU for AI workloads.
The shift in architecture for the Ultra 7 series generally aims at improving power efficiency and enabling new AI-centric features.
Core Configuration and Performance
Both CPUs use a hybrid core design, but the composition and capabilities differ.
- Core Ultra 7 255U: It features a 2+8+2 core configuration. This includes 2 Performance-cores (P-cores), 8 Efficient-cores (E-cores), and 2 new Low Power Efficient-cores (LP E-cores). The LP E-cores are designed to handle background tasks with minimal power draw. Its maximum turbo frequency typically reaches up to 4.8 GHz.
- Core i7-1355U: It utilizes a 2+8 core configuration, with 2 P-cores and 8 E-cores. It does not include the LP E-core tier. This chip can often reach slightly higher turbo frequencies, generally up to 5.0 GHz, which can benefit short-burst, single-threaded tasks.
In multi-threaded workloads, the Core Ultra 7 255U may show efficiency advantages, while the Core i7-1355U might hold an edge in certain peak single-threaded applications due to its higher clock speeds.
Integrated Graphics and AI Capabilities
The graphical and AI processing capabilities mark a significant generational leap.
- Core Ultra 7 255U: It integrates an Intel Arc graphics unit. This represents a major architectural upgrade over previous generations, offering significantly better performance for light gaming, content creation, and media playback. Its dedicated NPU handles AI and machine learning tasks efficiently, which is becoming increasingly relevant for features like background blur in video calls and creative software enhancements.
- Core i7-1355U: It features Intel Iris Xe Graphics. While capable for everyday use and light graphical tasks, it is typically less powerful than the Arc graphics in the Ultra series. AI workloads are processed by the CPU and GPU, which can be less power-efficient for sustained AI tasks.
Power Efficiency and Platform Features
Efficiency and connectivity are crucial for mobile devices.
- Power Efficiency: The Core Ultra 7 255U, with its new architecture and LP E-cores, is designed with a stronger focus on power efficiency, which can contribute to longer battery life in suitable laptop designs. The Core i7-1355U is also efficient but is based on a more mature, traditional design.
- Platform Support: Laptops featuring the Core Ultra 7 255U usually support newer connectivity standards like Wi-Fi 7 and Bluetooth 5.4, alongside Thunderbolt 4. The Core i7-1355U platform typically supports Wi-Fi 6E and Bluetooth 5.2, with Thunderbolt 4 support as well. Both support modern memory (LPDDR5/x) and storage standards.
Comparison Table
| Feature | Intel Core Ultra 7 255U | Intel Core i7-1355U |
|---|---|---|
| Codename / Generation | Meteor Lake (1st Gen Core Ultra) | Raptor Lake (13th Gen) |
| Core Configuration | 14 Cores (2P + 8E + 2 LP E) | 10 Cores (2P + 8E) |
| Threads | 14 Threads | 12 Threads |
| Max Turbo Frequency | Typically up to 4.8 GHz | Typically up to 5.0 GHz |
| Integrated Graphics | Intel Arc Graphics | Intel Iris Xe Graphics |
| AI Acceleration | Dedicated Neural Processing Unit (NPU) | CPU/GPU-based AI (No dedicated NPU) |
| Manufacturing Process | Intel 4 (Compute Tile) | Intel 7 |
| Base Power (PBP) | 15W | 15W |
| Memory Support | LPDDR5/x-7467, DDR5-5600 | LPDDR5/x-6400, DDR5-5200 |
| Wireless Connectivity | Typically Wi-Fi 7, Bluetooth 5.4 | Typically Wi-Fi 6E, Bluetooth 5.2 |
| Key Feature Introduction | Disaggregated tile design, LP E-cores, Arc GPU, NPU | Refined hybrid performance architecture |
Frequently Asked Questions (FAQ)
What is the main advantage of the Core Ultra 7 255U over the Core i7-1355U?
The main advantages are its newer integrated Arc graphics, which offer better performance for graphical tasks, and the inclusion of a dedicated NPU for more efficient AI and machine learning processing. Its architecture is also designed for improved power efficiency.
Does the Core i7-1355U have any performance advantages?
Potentially, yes. Due to its higher maximum turbo frequency (typically up to 5.0 GHz), the Core i7-1355U might deliver better performance in certain single-threaded applications that rely on peak clock speeds. Its performance in traditional workloads is well-established.
Which processor is better for battery life?
While actual battery life depends heavily on the laptop’s overall design, the Core Ultra 7 255U is architecturally designed with power efficiency as a primary goal, featuring Low Power E-cores for background tasks. This can generally lead to longer battery life in comparable systems.
Is the AI (NPU) in the Core Ultra 7 255U important for everyday use?
Its importance is growing. The NPU efficiently handles specific AI tasks like video call background effects, noise cancellation, and certain creative software filters. While not essential for basic computing, it enables and improves features that are becoming more common in modern applications.
Final Thoughts
The Intel Core Ultra 7 255U and Core i7-1355U cater to users with different priorities. The Core Ultra 7 255U represents Intel’s forward-looking vision, integrating advanced graphics and dedicated AI hardware within a power-efficient design. It is suited for users who value modern features, potential battery life gains, and improved graphical performance. The Core i7-1355U, on the other hand, is a proven performer from the previous generation, often available in a wide range of laptops and capable of delivering strong CPU performance, particularly in short-burst tasks. The choice between them typically depends on whether one prioritizes the latest architectural advancements and AI capabilities or seeks reliable performance from a mature platform.