Abstract: A data center cooling system, including a support structure having a lower portion and an upper portion, one or more fans supported by the support structure at a height that is equal to or greater than a height of the electronics cabinets, and a heat exchanger having one or more cooling coils supported at the upper portion of the support structure. In some embodiments, the cooling coils can be supported by the upper portion of the support structure so as to be above the top of and/or over one or more of the electronics cabinets. The fans can be configured to draw air from the one or two rows of electronics cabinets and to cause the air to be passed through the heat exchanger to cool the warmer air from the electronics cabinets.

Abstract: Described is a personal computer system which includes a central processing unit (CPU) and power management circuitry (PMC) in circuit communication with the CPU. A power supply is in circuit communication with the CPU and the PMC and includes circuitry for selectively providing system power to the computer system and auxiliary power to the PMC (1) from an external source or (2) from an internal source. When the system is in a normal operating state and the external source stops providing power at a predetermined level (e.g., brownout or blackout) to the power supply, the power supply is operative to generate a control signal to the PMC and switch to its internal power source. The power management circuitry is characterized in that while in the normal operating state, responsive to the power supply activating the control signal, the PMC causes the computer system to change to the suspend state wherein the entire state of the system is safely saved to a non-volatile storage device.

Abstract: Described is a personal computer system which includes a central processing unit (CPU) and power management circuitry (PMC) in circuit communication with the CPU. A switch is coupled to the PMC. A power supply is coupled to the CPU, PMC and the switch and includes circuitry for selectively providing system power to the computer system and auxiliary power to the PMC (1) from an external source or (2) from an internal source. When the system is in a normal operating state and the external source stops providing power at a predetermined level (e.g., blackout or brownout) to the power supply, the power supply is operative to change to its internal power and generate a control signal to the switch. The control signal causes the switch to activate a closure event and generate another control signal.