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  • To determine whether a power supply (PSU) supports the ATX 3.0 or ATX( 2025/07/04 )

    1. Check the Manufacturer’s Specifications

    • Look for the official product page or datasheet of the PSU on the manufacturer’s website.
    • Search for terms like:
      • "ATX 3.0 compliant"
      • "ATX 3.1 compliant"
      • "PCIe 5.0 ready" (since ATX 3.0+ requires support for high-power GPU transients)
    • Some manufacturers explicitly state compliance in the product name (e.g., "Corsair RM1000e ATX 3.0").

    2. Look for the 12VHPWR (12+4-pin) Connector (ATX 3.0)

    • ATX 3.0 introduced the 12VHPWR (12+4-pin) connector for high-power GPUs (like NVIDIA RTX 40-series).
    • ATX 3.1 replaces it with the 12V-2×6 connector (improved safety).
    • If your PSU has a 12VHPWR or 12V-2×6 cable, it’s likely ATX 3.0/3.1 compliant.

    3. Read the PSU Label or Documentation

    • Some PSUs have compliance labels on the side or back (e.g., "Intel ATX 3.0 Certified").
    • Check the manual for mentions of Intel ATX 3.0/3.1 specifications.

    4. Verify Power Excursion Capability

    • ATX 3.0/3.1 PSUs must handle 200% power excursions (short bursts) for GPUs.
    • Look for claims like:
      • "200% GPU power excursion support"
      • "Handles 2x total power for 100μs"

    5. Use a PSU Database or Review

    • Websites like:
      • TechPowerUp PSU Database
      • Tom’s Hardware PSU Reviews
      • Cybenetics (PSU Certification Database)
    • These often list whether a PSU meets ATX 3.0/3.1 standards.

    6. Check the Release Date

    • PSUs released before 2022 are unlikely to be ATX 3.0 compliant.
    • ATX 3.1 was introduced in 2024, so newer models may support it.

    7. Contact Manufacturer Support

    • If unsure, email the manufacturer with the exact model number and ask if it’s ATX 3.0 or ATX 3.1 compliant.

    Key Differences: ATX 3.0 vs. ATX 3.1

    Feature

    ATX 3.0

    ATX 3.1

    Connector

    12VHPWR (12+4-pin)

    12V-2×6 (improved safety)

    Power Excursion

    200% GPU load

    Same, but refined specs

    Release Date

    2022

    2024

    Conclusion

    • If your PSU has a 12VHPWR/12V-2×6 connector and supports 200% power spikes, it’s likely ATX 3.0/3.1.

    Always verify with official specs to be sure.

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