ATX Converter Buyer's Guide: GaN, ATX 3.1 & High-Wattage Options

The market for ATX converters in 2026 is rapidly evolving, driven by the shift toward GaN (Gallium Nitride) technology and the ATX 3.1 standard. Key insights include:

GaN Integration: Gallium Nitride is now the strategic standard for high-density power design (65W–330W), enabling 330W adapters to fit into 1-inch low-profile cases while significantly reducing heat.
ATX 3.1 Adoption: The new standard, featuring the 12V-2x6 connector, is essential for modern GPUs, delivering up to 600W per cable with a safety handshake to manage extreme power spikes.
AI Influence: The rise of AI workstations has pushed demand for high-wattage PSUs into the 1000W–1600W range, capable of sustained maximum power draws.
B2B Sourcing: Current market offerings range from affordable DC-ATX Pico PSUs ($8–$18) for compact builds to high-performance ATX 3.1 modular units ($47–$80).

I have synthesized these findings into a detailed report below, which includes technological drivers, product categories, and representative supplier data.

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