Definition: Power Good Delay (PG Delay) is the amount of time it takes a power supply to start up completely and begin delivering the proper voltages to the connected devices.
According to the Power Supply Design Guide for Desktop Platform Form Factors (PDF), Power Good Delay, referred to as PWR_OK delay in the linked document, should be 100 ms to 500 ms.
Also Known As: PG Delay, PWR_OK Delay
Examples:
"When I tested my power supply with a power supply tester, the 'PG' indicator said 375 ms, which indicated that my 'power good' signal was working properly."

