ATX12VO Power Supply Standard gets tested, shows really good IDLE power consumption

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We've talked about the new ATX power supply connector for motherboards a couple of times already. But a production model has been tested by our German colleagues from Heise, and it shows promising results.



A while ago Intel already announced that it is working on a new standard for PC power supplies. ATX12VO will only offer a 12 volts connection. So doesn't that pose a big issue with the compatibility of 5V devices like your SSD? Well no, because future motherboards will then become responsible for converting 12 volts to other required voltages through DC-DC conversion.



Such a power supply would need much fewer wires on that ATX motherboard connector, and as such ATX12VO only has 10 cables at that specific connector. Of course, there will be PEG connectors, etc for say your graphics card leading from the PSUs, but really all cables coming from that PSU would be 12v based. The new standard will be implemented in the industry first, and it might take many years before it'll hit the consumer market. Intel will release the ATX12VO specification this year. 


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The German tech publication Heise has been given the opportunity to test an atx12vo system and saw notable steps in overall efficiency.

ATX12VO overall system uses less than 7 watts

Intel provided Heise with an early series LGA1200 motherboard Asrock Z490 Phantom Gaming 4SR and a power supply HP1-P650GD-F12S with ATX12VO technology. Even with the BIOS standard settings, the system with a Core i9-10900K, a SATA SSD and 16 GB of RAM achieved a power consumption of only 13 watts when the Windows desktop was idle. Only a few (current) ATX boards can do this and only with optimized CPU energy-saving settings. 

With activated C-states and activated SATA and PCIe Link Power Management, they were able to reduce the idle value of the ATX12VO test system to below 7 watts. initially, there will be mainly complete systems from large PC manufacturers with ATX12VO technology. In the longer term, the new standard will also be of interest to PC hobbyists, because Intel works with power supply manufacturers such as Channel Well, Cooler Master, Corsair, Delta, FSP, High Power and SeaSonic.

ATX12VO Power Supply Standard gets tested, shows really good IDLE power consumption

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