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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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