Coreboot Adds CC6 To Improve AMD Power Savings
Added to Coreboot this week was CC6 support to provide greater power-savings for current-generation AMD processors.
Timothy Pearson of Raptor Engineering took on the challenge to implement CC6 support for Coreboot so there's more competitive power-savings when using this free BIOS/UEFI implementation. He explained of the patch, "This patch adds CC6 power save support to the AMD Family 15h support code. As CC6 is a complex power saving state that relies heavily on CPU, northbridge, and southbridge cooperation, this patch alters significant amounts of code throughout the tree simultaneously. Allowing the CPU to enter CC6 allows the second level of turbo boost to be reached, and also provides significant power savings when the system is idle due to the complete core shutdown."
AMD Family 15h are the Bulldozer CPUs. CC6 is short for the Core-C6 sleep state.