Barcelona: the technical lowdown
This feeds into its claim that its “total-platform” power consumption – the total power being sucked out of the mains socket – is lower for an AMD system than an equivalent Intel box. It gives typical figures of 186W for a Barcelona server, against 228W for a quad-core Xeon 5300 series system. Intel, however, tends to claim roughly the opposite.
Other power management enhancements include “Enhanced AMD Power Now” giving independent processor frequency control (allowing idle cores to reduce clock speed and save power), plus independent power planes for the cores and memory controller, allowing each to enter power-saving states independently.