SFX PSU vs ATX PSU: Choosing the Right PSU Size

Daftar Isi

When building or upgrading a PC, selecting the right power supply unit (PSU) is crucial. Among the various considerations, one often overlooked factor is the PSU size. Two common sizes are SFX (Small Form Factor) and ATX (Advanced Technology Extended). Let’s explore the differences, advantages, and scenarios where each shines.

Unlocking Compact Power with SFX PSU: A Guide to Small Builds

In the realm of PC building, the quest for compact yet powerful components has led to the emergence of SFX PSUs—Small Form Factor Power Supply Units—ushering in a new era of space-efficient computing solutions. But what exactly is SFX, and why is it gaining traction among builders? Let’s delve into the intricacies of SFX PSUs and explore their advantages for small builds.

Understanding SFX

SFX PSUs, as the name suggests, are power supply units designed with compactness in mind. Compared to their larger ATX counterparts, SFX PSUs boast significantly smaller dimensions, measuring approximately 100mm x 125mm x 63.5mm (W x L x H), making them a perfect fit for space-constrained environments such as mini-ITX builds or Home Theater PCs (HTPCs).

Power Output and Applications

Despite their diminutive size, SFX PSUs pack a punch when it comes to power delivery. With power outputs ranging from 300W to 800W or more, these compact units are more than capable of meeting the demands of modern computing systems, including gaming rigs, multimedia setups, and workstation configurations.

Advantages of SFX PSUs

  1. Space Efficiency: One of the primary advantages of SFX PSUs lies in their space-efficient design. By opting for an SFX PSU, builders can maximize the use of available space within compact cases, enabling the creation of sleek and minimalist PC builds without compromising on performance.
  2. Portability: Another notable benefit of SFX PSUs is their lightweight and portable nature. Unlike bulkier ATX PSUs, SFX units are easy to transport, making them an ideal choice for enthusiasts who frequent LAN parties or require a portable gaming solution for on-the-go gaming experiences.
  3. Quiet Operation: High-quality SFX PSUs often feature advanced cooling solutions, including quiet fans and efficient heat dissipation mechanisms. This results in a quieter computing experience, with reduced noise levels even under heavy load, ensuring a peaceful environment for both work and play.

The Future of Small Form Factor Computing

As the demand for compact and portable computing solutions continues to grow, SFX PSUs are poised to play a pivotal role in shaping the future of small form factor PC builds. With their space-efficient design, robust power delivery, and quiet operation, SFX PSUs offer a compelling solution for enthusiasts and professionals seeking to harness the power of modern computing in a smaller footprint.

Read More: 12VXO and Beyond: The Future of PSU Standards

Unveiling the Backbone of PC Power: The ATX PSU

In the dynamic landscape of PC building, the ATX PSU stands as a stalwart symbol of versatility and power, providing the backbone for a myriad of computing configurations. But what exactly is ATX, and why does it remain the go-to choice for discerning builders? Let’s embark on a journey to unravel the essence of ATX PSUs and explore their inherent advantages.

Deciphering ATX

ATX, short for Advanced Technology eXtended, represents the quintessential PSU form factor that has solidified its presence in the realm of PC building. Characterized by its standardization and widespread adoption, ATX PSUs are commonly found in mid-tower and full-tower cases, offering a universal solution for housing a diverse range of computing setups.

Size Matters

In the realm of PSU form factors, size plays a pivotal role in determining compatibility and functionality. Unlike their compact SFX counterparts, ATX PSUs boast larger dimensions, providing ample room for components within standard ATX cases. This spaciousness ensures a hassle-free installation process and allows for the accommodation of high-performance hardware configurations.

Power at Your Fingertips

With power outputs ranging from 500W to 1000W or more, ATX PSUs offer a broad spectrum of wattage options to cater to the diverse needs of modern computing systems. Whether you’re equipping your rig with multiple GPUs, high-end CPUs, or extensive storage arrays, an ATX PSU delivers the necessary firepower to fuel your computing endeavors.

Advantages of ATX PSUs

  1. Unrivaled Compatibility: One of the standout features of ATX PSUs is their universal compatibility with a wide range of cases. Whether you’re building a gaming powerhouse, a multimedia workstation, or a robust server infrastructure, the ATX form factor ensures seamless integration into virtually any chassis, offering builders unparalleled versatility and flexibility.
  2. Ample Power Reserves: For users demanding maximum performance from their hardware, ATX PSUs provide the ideal solution with their higher wattage options. Whether you’re engaging in intense gaming sessions, content creation endeavors, or resource-intensive computational tasks, an ATX PSU delivers the robust power delivery required to meet the demands of even the most power-hungry components.
  3. Enhanced Cooling Capabilities: Thanks to their larger size, ATX PSUs offer enhanced cooling capabilities compared to smaller form factors. The spacious interior allows for the integration of larger fans and improved airflow management, ensuring optimal thermal performance and system stability even under demanding workloads.


Choose wisely based on your build’s requirements. If space is at a premium, opt for an SFX PSU. For versatility and power, go with ATX. Remember, the right PSU ensures stable performance and longevity for your PC.

error: Content is protected !!