On Tue, Oct 18, 2011 at 6:36 PM, STeve Andre' <and...@msu.edu> wrote: > If going from 1.3GHz to 800MHz saves .5 watts, the power supply isn't > the most efficient, I'd say. You ought to see several watts, though less > than 10, at a wild guess. Of course, your kill-a-watt meter might be off, > too. I saw one that was +/- 20% of its crate mates, so while I think > the product is neat, I'm not sure of their build quality. > > The other think you can do is get a 'green' disk and shave off a few > watts (2.5 inch disks are better), and if the Radeon card isn't built in, > put a simpler card in (assuming a server). > > Lastly, if you have multiple machines try a different power supply. >
http://www.openbsd.org/cgi-bin/cvsweb/~checkout~/src/sys/kern/sched_bsd.c I think looking at that file, maybe the CPU's cores are all awake every rrticks_init. Is that a big reason for low power savings, each core waking up?
