The power range of the SFX power supply is quite wide, and it depends on the product design and market demand:

The power range of the SFX power supply is typically between 300W and 800W. With technological advancements, there are now high-power models with 1000W capacity on the market. Different power levels are suitable for different hardware configuration requirements. Specifically, they can be divided into the following categories:

Low power range (300W - 500W)

The SFX power supply in this power range is mainly suitable for light-duty office and home mini-computers. These computers usually come with entry-level CPUs (such as Intel Celeron or AMD Athlon) and integrated graphics, without an independent graphics card, and have relatively low power consumption. For example, mini-ITX computers used for daily document processing, web browsing, and video playback can be powered by an SFX power supply ranging from 300W to 400W; if combined with a few SATA hard drives and external devices, a 500W model can provide more sufficient power supply capacity.

Medium power range (500W - 800W)

This is the mainstream power range of SFX power supplies, suitable for small gaming consoles or design computers equipped with mid-range CPUs (such as Intel i5, AMD Ryzen 5) and mid-to-high-end discrete GPUs (such as RTX 4060, RX 7600). For example, a mini-ITX gaming console equipped with i5-13400F and RTX 4060 can be powered stably by a 650W-750W SFX power supply; while for a configuration with Ryzen 7 7700 and RX 7900 GRE, an 800W model is a more reliable choice.

High power range (800W - 1000W)

High-power SFX power supplies are niche models, mainly designed for "supercharged" computers equipped with high-end CPUs (such as Intel i9, AMD Ryzen 9) and flagship graphics cards (such as RTX 4090, RX 7900 XTX). Examples include Corsair SF1000, SilverStone SX1000R and other 1000W models, which can meet the high power consumption requirements of high-end hardware. However, these power supplies are relatively expensive and have higher requirements for the cooling of the computer case.

In conclusion, the power range of SFX power supplies varies from 550W to 1300W, depending on the product's positioning and design. With the advancement of technology, the power limit of SFX power supplies is also continuously increasing.