"This fell in my lap over the weekend, but I didn’t have time to cover it last week: An update is available that allows for a potential power saving in an AMD multicore processor that is running an x64-based version of Windows Vista SP2, of Windows Server 2008 SP2, of Windows 7, or of Windows Server 2008 R2.

The update in itself is worth a download and an install, to make post-Vista 64-bit platforms play nice with Enhanced C1 state (C1E) for lower power consumption for an AMD multicore processor. But what is interesting is that under Hotfix Support for Windows 7/Windows Server 2008 R2 it says SP1 (Service Pack 1) and SP3 for Vista."