Intel introduces the ATX 3.0 and ATX12VO 2.0 specifications, two new ATX PSU specifications for the next-generation hardware power demands. Intel has published the most significant update to industry power supply specifications since the initial ATX 2.0 specs were introduced in 2003. Updated ATX 3.0 specifications unlock the full power and potential of next-generation hardware and upcoming components built for technologies like PCIe Gen 5.0. Intel has also revised its ATX12VO spec to provide the PC industry with an updated blueprint for designing power supply units (PSUs) and motherboards that reduce power draw at idle, helping customers lower electrical demand.
Key Additions To ATX 3.0 / ATX12VO 2.0 Specifications
A new 12VHPWR connector will power most, if not all, future PCIe 5.0 desktop Add-in cards (e.g., graphics cards). This new connector provides up to 600 watts directly to any PCIe 5.0 Add-in/graphics card. It also includes sideband signals that will allow the power supply to communicate the power limit it can provide to any PCIe 5.0 graphic card.
New guidelines reflect the PCIe CEM Gen 5 power excursion limit for PCIe 5.0 add-in cards that was published in November 2021. Updated specifications include new DC output voltage regulation that will be necessary for managing new power excursion requirements.
ATX12VO 2.0 also adds the I_PSU% feature to desktop platforms – delivering an Intel-driven innovation previously available on mobile and server platforms. This feature provides benefits to small form-factor (SFF) systems that cannot employ larger power supplies. It also provides cost efficiencies for original equipment manufacturers (OEMs) as they are better able to right-size PSU selection to meet system requirements.
Source: Intel Newsroom
