Originally Posted by
VR-Zone
If you get your freak on by an extreme low power state you may need to get a new power supply if you want to use the new C6/C7 low power states of Intel's upcoming Haswell processors. These new power states require a power supply that can maintain a minimum current load of 0.05A on the CPU exclusive 12V2 rail.
The previous ATX12V v2.3 design guidelines called for a minimum load of 0.5A on the CPU power rail, so a lot of older and budget power supplies will likely not meet the new specification, resulting in stability or shutdown issues once the system enters the C6/C7 power state.