Table of Contents
How much power does a 24 pin connector provide?
2) Below is the complete pinout table for the standard ATX 24-pin 12V power supply connector as of Version 2.2 of the ATX Specification (PDF).
Is the 24 pin connector supposed to be missing a pin?
This empty pin on your 24 pin connector used to be home to a wire carrying -5V. Since around 2003 the -5V rail was removed from ATX specification and as a result most modern power supplies do not include it.
What is the usage 24 pin ATX power?
This cable is also keyed, meaning it only connects in one direction. A power supply with a 24-pin connector can be used on a motherboard with a 20-pin connector by leaving the four additional pins disconnected. However, if you have a 24-pin connection on your motherboard all 24-pins need to be connected.
What is the voltage of the power good signal?
The ATX specification defines the Power-Good signal as a +5-volt (V) signal generated in the power supply when it has passed its internal self-tests and the outputs have stabilized. This normally takes between 0.1 and 0.5 seconds after the power supply is switched on.
Why is my PC not getting power?
Make sure any surge protector or power strip is correctly plugged into the outlet, and that the power switch is on. Plug in other devices to the power strip and confirm they are operating properly. Double-check that your PC’s power supply on/off switch is on.
What is the minimum efficiency (%) of a power supply unit PSU?
80%
The program got its name from the 80% minimum efficiency that a power supply needs to exhibit for its first level at 20% load, 50% load, and its full rated load, along with a power factor (PF) of at least 0.9 with full load.
Is the ATX12V necessary?
This connector is used to supply additional 12V current to the motherboard. While the system will likely still run without it, higher current demands such as extreme overclocking or large video card current draws may require it. “
Is it safe to mix PSU cables?
No. There is no universal standard for modular PSU cables. This is a public service announcement (PSA) – Never mix modular or semi-modular PSU cables between power supplies. Mixing Modular PSU Cables Can Kill Hard Drives or connected SSDs.