Quick Answer
The Intel Core Ultra 7 155U and the Intel Core i7-1355U are both 15-watt mobile processors designed for thin and light laptops. The Core Ultra 7 155U, part of the newer Meteor Lake generation, introduces a dedicated AI accelerator (NPU) and a more advanced integrated Arc graphics unit. The Core i7-1355U, from the previous Raptor Lake generation, offers strong traditional CPU performance but lacks a dedicated NPU and uses older Intel Iris Xe graphics.
Intel Core Ultra 7 155U vs Intel Core i7 1355U: Full Comparison
Introduction
Choosing a laptop often involves understanding the processor at its heart. For users considering modern thin-and-light devices, the Intel Core Ultra 7 155U and the Intel Core i7-1355U are two prominent options from consecutive generations. This comparison breaks down their architectures, performance profiles, and feature sets to clarify their differences. By examining aspects like core design, graphics, and AI capabilities, this guide aims to help you understand which processor might align better with specific computing needs, from everyday productivity to more demanding creative tasks.
Architecture and Manufacturing Process
The fundamental difference between these processors lies in their underlying architecture and how they are built.
- Intel Core Ultra 7 155U (Meteor Lake): This chip represents a significant architectural shift. It is built on Intel 4 process technology and utilizes a disaggregated “chiplet” design. This means the CPU cores, GPU, and I/O are built on separate tiles and packaged together. This approach is generally considered more power-efficient and allows for better integration of specialized components.
- Intel Core i7-1355U (Raptor Lake): This processor is based on an evolved version of the older architecture, built on the Intel 7 process (previously known as 10nm Enhanced SuperFin). It uses a more traditional monolithic die design where all components are on a single piece of silicon.
The move to the Intel 4 process and chiplet design in the Ultra 7 155U typically aims for improved power efficiency, which can contribute to longer battery life in similar laptop designs.
CPU Core Configuration and Performance
Both CPUs are configured with a hybrid architecture combining Performance-cores (P-cores) and Efficient-cores (E-cores), but their layouts differ.
- Core Ultra 7 155U: It features 2 P-cores, 8 E-cores, and an additional 2 Low Power E-cores (LP E-cores) on a separate tile. This totals 12 cores (14 threads). The LP E-cores are designed to handle background tasks with minimal power draw, further aiding efficiency.
- Core i7-1355U: It is configured with 2 P-cores and 8 E-cores, for a total of 10 cores (12 threads). It does not include the dedicated Low Power E-core cluster found in the Meteor Lake design.
In terms of raw CPU performance for traditional tasks like office applications, web browsing, and light multi-tasking, the differences may not be dramatic in daily use. The i7-1355U’s higher base and turbo frequencies can give it an edge in short, bursty workloads. The Ultra 7 155U’s more advanced architecture and additional LP E-cores may provide an advantage in sustained multi-threaded workloads and overall system efficiency.
Integrated Graphics and AI Capabilities
This is one of the most notable areas of differentiation between the two generations.
- Graphics (GPU): The Core Ultra 7 155U integrates an Intel Arc graphics unit with 8 Xe-cores. This represents a generational leap over the Intel Iris Xe graphics (with 96 execution units) found in the i7-1355U. The Arc graphics typically offer significantly better performance for light gaming, video editing, and GPU-accelerated applications.
- AI Processing (NPU): A key feature of the Meteor Lake generation is the inclusion of a dedicated Neural Processing Unit (NPU). The Core Ultra 7 155U has this AI engine on-die, designed to efficiently handle AI workloads like background blur in video calls, voice assistants, and creative software filters. The Core i7-1355U lacks a dedicated NPU, so any AI tasks are handled by the CPU or GPU, which can be less efficient.
Platform Features and Connectivity
The newer platform of the Core Ultra 7 155U brings updated standards and support.
- Wireless Connectivity: Laptops featuring the Core Ultra 7 155U typically come with newer Wi-Fi 6E or Wi-Fi 7 and Bluetooth 5.4 support. Systems with the Core i7-1355U commonly feature Wi-Fi 6E and Bluetooth 5.1 or 5.2.
- Memory Support: Both processors support LPDDR5/x and DDR5 memory. The Core Ultra 7 platform may offer support for higher memory speeds depending on the laptop manufacturer’s implementation.
- Thunderbolt 4: Both CPUs support Thunderbolt 4 connectivity.
Power Efficiency and Battery Life
Both processors share the same 15W base processor power (PBP) and a 57W Maximum Turbo Power rating, meaning laptop manufacturers can design cooling systems around similar power envelopes. However, the Core Ultra 7 155U’s Intel 4 process technology, chiplet design, and Low Power E-cores are engineered specifically for better power management. In comparable laptop chassis with similar battery sizes, systems equipped with the Ultra 7 155U have the potential to deliver longer battery life, especially during light usage where the LP E-cores and NPU can operate efficiently.
Comparison Table: Intel Core Ultra 7 155U vs Intel Core i7-1355U
| Feature | Intel Core Ultra 7 155U | Intel Core i7-1355U |
|---|---|---|
| Generation & Codename | Meteor Lake | Raptor Lake (Refresh) |
| Manufacturing Process | Intel 4 | Intel 7 |
| Architecture | Disaggregated Chiplet Design | Monolithic Die |
| Total Cores / Threads | 12 Cores (2P + 8E + 2 LP E) / 14 Threads | 10 Cores (2P + 8E) / 12 Threads |
| Max Turbo Frequency | Typically up to 4.8 GHz | Typically up to 5.0 GHz |
| Integrated Graphics | Intel Arc Graphics (8 Xe-Cores) | Intel Iris Xe Graphics (96 EUs) |
| Dedicated AI Engine (NPU) | Yes (Intel AI Boost) | No |
| Base Processor Power (PBP) | 15W | 15W |
| Max Turbo Power (MTP) | 57W | 57W |
| Memory Support | LPDDR5/x-7467, DDR5-5600 | LPDDR5/x-6400, DDR5-5200 |
| Wireless Support (Typical) | Wi-Fi 6E/7, Bluetooth 5.4 | Wi-Fi 6E, Bluetooth 5.1/5.2 |
| Key Platform Advantage | Modern architecture, superior iGPU, dedicated NPU for AI, potential efficiency gains. | Mature platform, strong traditional CPU performance in burst workloads. |
Frequently Asked Questions (FAQ)
What is the main difference between the Core Ultra 7 155U and the Core i7-1355U?
The primary differences are architectural. The Core Ultra 7 155U is built on a newer chiplet design (Meteor Lake) with a dedicated NPU for AI tasks and significantly more powerful Intel Arc integrated graphics. The Core i7-1355U uses the previous monolithic design and features older Iris Xe graphics without a dedicated NPU.
Which processor is better for battery life?
While both have the same official 15W power rating, the Core Ultra 7 155U is engineered with power efficiency as a key goal. Its Intel 4 process, Low Power E-cores, and NPU are designed to reduce power consumption during common tasks. Therefore, in similarly configured laptops, the Ultra 7 155U generally has the potential for longer battery life.
Is the Core Ultra 7 155U better for gaming?
For light gaming on integrated graphics, yes. The Intel Arc graphics in the Ultra 7 155U are a substantial upgrade over the Iris Xe graphics in the i7-1355U. It can typically handle modern esports titles and older AAA games at lower settings more comfortably.
Does the Core i7-1355U support AI features?
It can run AI-assisted features, but it lacks a dedicated Neural Processing Unit (NPU). This means AI workloads are processed by the CPU or GPU, which can be less efficient and may impact system performance or battery life compared to a processor with a dedicated NPU like the Core Ultra 7 155U.
Final Thoughts
The Intel Core Ultra 7 155U represents a forward-looking step in mobile computing, bringing a modern chiplet architecture, a capable Arc GPU, and dedicated AI hardware to the 15W segment. Its design prioritizes balanced performance with a strong focus on graphics and power efficiency. The Intel Core i7-1355U remains a competent processor from the previous generation, offering reliable and proven performance for general productivity, with potentially higher peak CPU clock speeds. The choice between them often depends on whether the user values the newer platform’s advancements in graphics, AI acceleration, and potential battery life improvements, or if their needs are fully met by the strong traditional computing performance of the prior generation. The specific implementation by the laptop manufacturer, including cooling, display, and battery size, will also play a significant role in the final user experience.