Qseven vs COM Express vs SMARC: How to Choose the Right Computer-on-Module
Home Blog Qseven blogs Qseven vs COM Express vs SMARC: How to Choose the Right Computer-on-Module Published On: 22 October 2026 Table of Contents Choosing the right Computer-on-Module (COM) is an important factor when designing an embedded system. The module affects the size of the system, its connections, power consumption, heat and upgradeability. Qseven, COM Express, and SMARC are three standards used in embedded computing. Each has its own size, connector, and design features. Knowing the differences can help engineers, OEMs and product creators to select the right one. Qseven is designed around a compact module format, COM Express offers multiple form factors and interface options, and SMARC targets compact embedded designs with an emphasis on low power This guide compares Qseven, COM Express, and SMARC. It outlines their key differences and what to look for when choosing a module for an industrial or embedded system What Is a QSeven Module?  Qseven is a Computer-on-Module standard for compact embedded designs. The module connects to a compatible carrier board, while processor options and supported interfaces depend on the specific model.  Features of Qseven Size: The Qseven Module is available in 70 × 70 mm and 40 × 70 mm sizes. Connector: Qseven Modules use a 230-pin MXM connector. Design: Qseven Modules can work with a compatible carrier board. Range of uses: Qseven Modules can be used in devices and other embedded products. Product choice: Processor types and features available depend on the Qseven module. Hence, a QSeven computer on a module can be a choice for designs that need a small module and a clear path for future upgrades. I always recommend checking the Qseven Module’s processor, ports, power needs, and software support before making a choice. What Is COM Express? COM Express is a Computer-on-Module standard developed by the PCI Industrial Computer Manufacturers Group (PICMG). It supports a range of embedded computing needs. Different COM Express types and sizes offer different layouts and connection options. This gives designers more choice when building systems for demanding tasks. Features of COM Express Several sizes: Common sizes include Mini, Compact, Basic, and Extended. Different module types: Connector layouts and available signals depend on the COM Express type. Wide range of uses: It can support industrial control, medical devices, and other embedded systems. Flexible design: A compatible carrier board provides the ports needed by the final product. Scalable computing: Different modules may offer different levels of processing power. COM Express may suit projects that need more processing power or a wider range of connections. The right choice depends on the required features, board space, power use, and budget. Before choosing a module, check its exact COM Express type. The module and COM Express carrier board must use compatible layouts and signals. What Is SMARC? SMARC stands for Smart Mobility ARChitecture. It is a Computer-on-Module standard maintained by SGET. SMARC is designed for compact, low-power embedded systems. It is often used with Arm-based processors, although the processor choice depends on the available module. Features of SMARC Compact design: Common module sizes are 82 × 50 mm and 82 × 80 mm. Standard connector: SMARC uses a 314-pin edge-finger connector. Low-power focus: Many SMARC designs suit systems with tight power limits. Small footprint: Its size can help when board space is limited. Flexible applications: It can be used in devices such as control systems, gateways, and other embedded products. SMARC may be a good option when size and power use are key concerns. Check the processor, memory, interfaces, cooling needs, and software support for each module. Qseven vs COM Express vs SMARC: Key Differences The three standards support modular embedded computing, but they differ in size, connectors, and design goals. Choose a Computer-on-Module by matching the processor, board space, interfaces, power and cooling limits, and carrier-board compatibility to your application’s requirements. Feature Qseven COM Express SMARC Standard body SGET PICMG SGET Main design focus Compact embedded systems A wide range of computing needs Compact, low-power systems Common module sizes 70 × 70 mm; 40 × 70 mm Mini, Compact, Basic, Extended 82 × 50 mm; 82 × 80 mm Connector 230-pin MXM Depends on module type 314-pin edge-finger Processor options Depends on module Depends on module Often Arm-based; check each model Connections Depend on module and carrier board Depend on module type and carrier board Depend on module and carrier board Best starting point Small designs with suitable module support Projects with specific computing and I/O needs Compact designs with tight power limits Not Sure Which Computer-on-Module Fits Your Design? Compare your processing, interface, power, and space requirements with Portwell’s team. Get Expert Guidance How to Choose the Right Computer-on-Module? There is no one universal best standard to use in all applications. It all depends on the requirements of your particular product. Consider these criteria before making your decision. 1. Application review Identify all the functions your product is going to perform first. For instance, a basic controller may require less computing power compared to a machine vision system that requires more advanced graphic or AI support. Document the main functions your product is going to perform before module comparison. 2. Module size and space for a board Calculate the dimensions of the free space available in your product. Consider the size of the module, the area for connectors and cooling elements. Qseven SOM and SMARC are small modules, whereas the COM Express has a variety of form factors. Evaluate the entire design, not the size of the module itself. 3. Selection of the right processor A processor defines the performance characteristics of the system such as speed, power consumption and capabilities. Evaluate the following parameters: Processor type and speed Number of cores Memory capacity Graphic or AI support, if necessary Operating system support Select a processor that meets your needs without additional unnecessary features. 4. Required Interfaces Depending on your project your product may require Ethernet, USB, PCIe, display interface and others. Make a list of all ports and signals required by your product and
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