600W Power Supply Buyer's Guide for ATX 3.1 Builds

I have analyzed the 600W power supply market and product trends for 2026. The industry is currently defined by a critical transition to ATX 3.1 and PCIe 5.1 standards, primarily to ensure the safety and efficiency of next-generation GPU and AI PC builds.

Key insights include:

Technical Standards: ATX 3.1 has superseded 3.0, introducing the safer 12V-2x6 connector to mitigate overheating risks associated with high-power GPUs. Tomshardware Msi
Consumer Behavior: Buyers are increasingly "right-sizing," with 600W-650W units identified as the efficiency sweet spot for mainstream builds. Tomshardware
Market Growth: The computer PSU market is projected to reach $21.42 billion by 2034, driven by a 6.2% CAGR and the rise of AI-accelerated hardware. Dataintelo
Technology Drivers: GaN (Gallium Nitride) semiconductors are enabling high-density, compact SFX units that remain cool and quiet. Asus Accio