Abstract: Information handling systems (IHSs) and methods are provided herein to allocate Peripheral Component Interconnect Express (PCIe) bus resources to a plurality of PCIe slots according to various PCIe bus resource allocation option settings. At least one host processor is included within the IHS for executing program instructions to detect a PCIe bus allocation option setting selected from a plurality of options provided in a boot firmware setup menu; determine if the PCIe bus allocation option setting has changed since the IHS was last booted; and allocate PCIe bus resources to the plurality of PCIe slots according to the detected PCIe bus allocation option setting. The plurality of options provided in the boot firmware setup menu include at least an auto detect option, which when selected, enables the at least one host processor to automatically detect unused PCIe slots and reallocate PCIe bus resources to used PCIe slots.

Abstract: An information handling system includes a system board configured to serialize sideband signals from a sideband cable resulting in serialized sideband signals, and a peripheral device expansion card that has a power management embedded controller. If the sideband cable is connected to the peripheral device expansion card, then the controller may transmit the sideband signals to a card controller. If the sideband cable is not connected to the peripheral device expansion card, then the controller may decode and parallelize the serialized sideband signals resulting in parallelized sideband signals, and transmit the parallelized sideband signals to the controller. The controller determines a power state of the information handling system based on the sideband signals from the sideband cable or the parallelized sideband signals.

Abstract: An information handling system includes a system board configured to serialize sideband signals from a sideband cable resulting in serialized sideband signals, and a peripheral device expansion card that has a power management embedded controller. If the sideband cable is connected to the peripheral device expansion card, then the controller may transmit the sideband signals to a card controller. If the sideband cable is not connected to the peripheral device expansion card, then the controller may decode and parallelize the serialized sideband signals resulting in parallelized sideband signals, and transmit the parallelized sideband signals to the controller. The controller determines a power state of the information handling system based on the sideband signals from the sideband cable or the parallelized sideband signals.

Abstract: Information handling systems (IHSs) and methods are provided herein to allocate Peripheral Component Interconnect Express (PCIe) bus resources to a plurality of PCIe slots according to various PCIe bus resource allocation option settings. At least one host processor is included within the IHS for executing program instructions to detect a PCIe bus allocation option setting selected from a plurality of options provided in a boot firmware setup menu; determine if the PCIe bus allocation option setting has changed since the IHS was last booted; and allocate PCIe bus resources to the plurality of PCIe slots according to the detected PCIe bus allocation option setting. The plurality of options provided in the boot firmware setup menu include at least an auto detect option, which when selected, enables the at least one host processor to automatically detect unused PCIe slots and reallocate PCIe bus resources to used PCIe slots.

Abstract: A power supply system includes a power supply coupled to a load via a main power rail, and a switch coupled between the power supply and the load on an auxiliary power rail. A controller controls the switch to couple the auxiliary power rail to the load in response to a startup command, and the controller controls the switch to uncouple the load from the auxiliary power rail in response to a shut down command and a low power mode being enabled.

Abstract: A power supply system includes a power supply coupled to a load via a main power rail, and a switch coupled between the power supply and the load on an auxiliary power rail. A controller controls the switch to couple the auxiliary power rail to the load in response to a startup command, and the controller controls the switch to uncouple the load from the auxiliary power rail in response to a shut down command and a low power mode being enabled.