PowerHousePC

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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