All about mini-ITX | ENBLE

All about mini-ITX | ENBLE

The Ultimate Guide to Mini-ITX: Building Compact Powerhouses

ASUS ROG Strix Z790-I Gaming Image: ASUS

The mini-ITX platform has become increasingly popular in recent years, captivating gamers, content creators, and enthusiasts alike. Its compact size and high-performance potential make it perfect for those who want a small yet capable system. In this guide, we will delve into the world of mini-ITX, providing you with everything you need to know about this small form factor and guiding you on how to build or buy your own mini-ITX system.

What is mini-ITX?

Mini-ITX, developed by VIA Technologies in 2001, is a small form factor (SFF) standard for motherboards and computer cases. Its main goal was to create compact and space-efficient computer systems while preserving the functionality of a typical desktop computer.

Mini-ITX boards are smaller than their more common counterparts, ATX and micro-ATX. They usually measure 170mm x 170mm (6.7 inches x 6.7 inches) and feature a single PCIe expansion slot, two RAM slots, and various I/O ports for USB, SATA, audio, and networking. Surprisingly, despite their small size, mini-ITX motherboards can support full-sized CPUs, memory, and storage devices, making them suitable for a wide range of computing tasks.

Given their size and capabilities, mini-ITX systems find applications as home theater PCs (HTPCs), compact gaming rigs, office computers, and other scenarios where space is limited or a small footprint is desired. Moreover, mini-ITX has gained popularity in the DIY and custom PC-building communities due to its flexibility and the creative possibilities it offers for building space-efficient yet powerful systems.

However, it’s important to note that mini-ITX motherboards do have some limitations when it comes to expandability and cooling, especially when compared to larger form factors like ATX. The size constraints can sometimes make cable routing and efficient cooling solutions challenging within compact mini-ITX cases.

Mini-ITX vs micro-ATX: A Quick Comparison

Mini-ITX vs micro-ATX Image: Voltcave

Mini-ITX and micro-ATX are both SFF standards for motherboards and computer cases, each with its own advantages and considerations. Let’s quickly compare the two:

Size and Dimensions

Mini-ITX boards are the smallest mainstream motherboard style, measuring 170mm by 170mm (6.7 inches by 6.7 inches). They are designed for extremely compact systems where space is at a premium. On the other hand, micro-ATX boards are larger, measuring around 244mm by 244mm (9.6 inches by 9.6 inches). While still compact compared to the standard ATX form factor, micro-ATX boards provide more room for expansion and features compared to mini-ITX, such as a secondary PCI-Express port.

Choosing the right case and other components for your system depends on these dimensions. A PC case with internal space of 25 liters or below is considered a mini-ITX chassis. Micro-ATX cases generally sit between mini-ITX and full-size ATX tower cases, with a few exceptions.

Expansion Slots

Mini-ITX boards typically have a single PCIe expansion slot, limiting your ability to install multiple graphics cards or expansion cards like sound cards or capture cards.

Micro-ATX boards, on the other hand, usually offer more expansion slots, commonly ranging from two to four PCIe slots. This allows for greater flexibility in adding multiple graphics cards, RAID controllers, or other expansion cards.

RAM Slots and Ports

Mini-ITX boards often have only two RAM slots, which limits the amount of RAM you can install. Similarly, they might have fewer SATA and I/O ports compared to larger form factors.

Micro-ATX boards generally offer more RAM slots than mini-ITX, allowing for greater memory capacity. They also tend to have more SATA ports, USB ports, and other connectors.

Cooling and Build Considerations

Due to limited space for heat sinks, fans, and airflow, mini-ITX systems pose challenges in terms of cooling. Additionally, cable management can be a daunting task in smaller cases.

Micro-ATX systems usually have more room for cooling solutions, larger fans, and better airflow. This can result in potentially better thermal performance and quieter operation.

Choosing between mini-ITX and micro-ATX depends entirely on your specific requirements and preferences. If you prioritize a small footprint and are willing to sacrifice expandability, mini-ITX might be a suitable option. On the other hand, if you desire more room for expansion options and better cooling, micro-ATX could be a better fit.

Why is mini-ITX so Expensive?

SSUPD Meshlicious Mini-ITX Case Image: SSUPD

Building a mini-ITX PC typically incurs higher costs compared to its larger counterparts. Several factors contribute to the higher price tag, including design complexity, manufacturing intricacies, and niche demand. Let’s explore why mini-ITX is often more expensive:

  • Engineering and Design Costs: Designing compact PC parts, such as mini-ITX motherboards, requires specialized engineering to fit all the necessary components into a smaller space. This often involves intricate circuit layouts, custom components, and additional research and development efforts. Moreover, manufacturing and assembly become more intricate and labor-intensive, resulting in higher production costs.

  • Limited Market Demand: The mini-ITX form factor caters to a specific market niche, including enthusiasts, compact PC builders, and those seeking small form factor solutions. The demand for mini-ITX is lower compared to standard ATX or even micro-ATX, leading to higher manufacturing costs due to the lack of economies of scale.

  • Higher Quality Components: Mini-ITX motherboards must accommodate all the necessary components, such as the CPU socket, RAM slots, power delivery, and expansion slots, within a smaller area. This often necessitates the use of smaller and sometimes more expensive components that can handle the higher power demands and heat dissipation challenges associated with limited space.

  • Features and Innovations: Mini-ITX motherboards often integrate a range of features to maximize the limited space available. These additional features can include improved power delivery, built-in Wi-Fi, M.2 slots, and other innovations, which can contribute to the overall cost.

While mini-ITX systems come at a higher price, they offer unique advantages and possibilities for those who value compactness and creativity in their PC builds.

Do Mini-ITX PCs Overheat?

Mini-ITX PCs can potentially experience higher temperatures and overheating issues compared to larger form factor PCs due to their compact size and limited airflow. However, whether a mini-ITX PC overheats or not depends on several factors, including component quality, case design, cooling solutions, and workload. Consider the following factors when it comes to thermal management in mini-ITX systems:

  • Case Design: The design of the mini-ITX case plays a crucial role in managing heat. Cases with efficient airflow paths, strategically placed vents, and support for proper cooling solutions, such as fans or liquid cooling, can help dissipate heat effectively.

  • Cooling Solutions: Mini-ITX cases often have limited space for cooling solutions, which can result in higher temperatures. Using efficient cooling solutions, such as low-profile CPU coolers, compact graphics card coolers, and additional case fans, can help mitigate heat-related issues.

  • Component Selection: High-performance components generate more heat. When building a mini-ITX system, it’s crucial to choose components that can handle limited space and thermal challenges. Some manufacturers offer specialized mini-ITX versions of components designed for these conditions.

  • Thermal Management: Proper thermal management practices, such as correct application of thermal paste and ensuring proper contact between heatsinks and components, are essential for optimizing heat dissipation. Understanding the airflow path and fan curves in your mini-ITX case can also improve cooling efficiency.

  • Workload: The type of tasks your mini-ITX PC performs impacts its temperatures. Intensive tasks like gaming or rendering generate more heat compared to light web browsing or office work.

  • Room Temperature: The ambient temperature of the room where the PC is located can influence its internal temperatures. Higher room temperatures can result in higher internal temperatures, so it’s advisable to position your mini-ITX PC in a well-ventilated room or one with air conditioning.

  • Maintenance: Regular cleaning of the case and components is crucial for a mini-ITX PC. Removing dust buildup helps maintain proper airflow and prevents higher temperatures over time.

If you’re intrigued by compact systems and want to venture even smaller than mini-ITX, check out some unique microcomputer builds for inspiration!


Mini-ITX systems have captured the hearts of gamers, content creators, and enthusiasts with their compact size and powerful performance. In this comprehensive guide, we explored everything you need to know about mini-ITX, from its origins to its advantages and considerations compared to micro-ATX. We also discussed the reasons behind the higher cost of mini-ITX systems and provided insights into their cooling challenges. With this knowledge in hand, you’re now equipped to embark on your mini-ITX journey and build the compact powerhouse of your dreams.