Built for the demanding power requirements of tomorrow, these PSUs offer maximum total power excursion support as per ATX 3.1 and PCIe Gen 5.1 specifications, ensuring peak performance with future hardware upgrades. Some changes in the new spec. from ATX3.0 to ATX3.1, FSP follows Intel recommended criteria to keep it on the latest version and focus on user benefits. Hold-up time indicates the length of time a power supply is able to maintain a consistent output voltage at a regular output level, after it is shut down or in a power shortage. This length of time is able to prevent instabilities in the computer system, or prevent interferences in case of sudden short circuit.