XFX announces the compatibility of XFX Pro Series PSUs with Intel's new 4th generation Intel Core processor, code-named Haswell , and their ability to go into a lower power sleep state. These select power supplies have been tested to assure readiness to support the new 4th generation Intel Core processor family.

When an Intel Core (i3, i5, i7) processor is idle, it enters a sleep state that requires less power than when the CPU is active with a minimum current of 0.05 Amps at 95W and 65W. Since the motherboard voltage regulation modules that provide power to the CPU gets their power from the power supply's +12V rail, these sleep states can dramatically reduce the load on the power supply's +12V rail.

According to Intel's presentation at IDF, the new Haswell processors enter a sleep state called C6/C7 that can drop processor power usage as low as 0.05A. Certain legacy PSUs may become unstable at the new minimum load of 0.05 Amps and trigger the PSU's under/overvoltage protection circuit causing the PSU to shut down. This will require the user to cycle the power on their power supply using the power switch on the back of the unit.