I don't know if the small partners have any impression of the names of ATX 2.3 and ATX 2.52, no and it is not surprising, because the standards of these power supplies have not been updated for a long time, and they have rarely been paid attention to. For example, the large version of ATX 2.0 was released in 2003, and the latest small version of ATX 2.52 also appeared in mid-2019, which is not surprising in the face of current power supply needs. Fortunately, not so long ago, the standard ATX 3.0, which was newer, stronger and more suitable for the new platform, finally arrived.
Here's a thing to understand, who made and released the ATX standard? Small partners first do not point out that this question is easy to confuse the concept, because the ATX motherboard standard and the ATX power standard are really developed and released by Intel. And just like the BTX motherboard, even if Intel is so strong, there are still unpentified power standards, such as ATX12VO, which only provides 12V output, which may be obsolete, and many technical standards will probably be incorporated into ATX 3.0.
Why? In fact, it is very simple, that is, in ATX 3.0, it still retains the +5V and other power supply. It has made a lot of changes that are no smaller than ATX12VO on the basis of retaining these traditional voltages, the first is to deal with the so-called PCIe 5.0 power supply interface of future graphics cards, the official name is 12VHPPWR, this confirmation, requiring more than 450W power supply must be standard.
Some of the small partners who have seen the previous push may be a little strange, is this interface not 600W power supply? How can a 450W power supply be provided? Under the ATX 3.0 standard, the power supply capacity of 12VHPPWR is divided into multiple versions, the minimum is only 75W, the highest is 600W, and the power supply capacity is reported to the graphics card through the sideband signal (sideband signal), so that the latter automatically sets the power consumption limit, and the power supply capacity will be marked on this interface, avoiding the fact that Mimi quietly confirms the power supply power of the graphics card after some power releases.
Another major change should be the efficiency, this time the efficiency of ultra-low load has requirements, 10W or 2% of the maximum nominal power, the efficiency should not be less than 60%, recommended not less than 70%, it is obviously the CPU performance core, GPU low load power saving and other design optimization. Such a high-power power supply, whether it is fully loaded to support games or high-end work, or daily Internet office, will not waste too much power.
As for stability, ATX 3.0 is more demanding. The instantaneous power supply peak of the power supply is 200% of the nominal power in 10% of the working cycle and 100 microseconds; the range of each voltage is also expanded, such as the most important 12V power supply can support up to 12.2V and a certain drop voltage.
Then there is the response time that was ignored by many users before, and probably there are manufacturers, and this time it is valued. Similar to the above ultra-low load reasons, the accessory supports power switching in order to save power, and it needs the cooperation of power supply to perform better. Therefore, ATX 3.0 requires increasing the voltage slew rate of the instantaneous load, and the +12V circuit should reach 2 to 5 times the previous one; adjust the PowerOn power-up signal speed to speed up the response and system wake-up.
This time not only emphasizes the response time, but even requires that the power label must include T1, T3 timing, coupled with this time is officially recognized, the probability of being added to the power plate Cybenetics certification, it seems that in the future for DIY novices, the power parameters are more difficult to understand.