My brief experience shows that there is no difference in power consumption whether you are using C4 or lowering a voltage with [est(4)](http://leaf.dragonflybsd.org/cgi/web-man/?command#est§ion4). C5 and C6 can make sense in tickless system only (DragonFly isn't such).
-You can find more general info about processor C-states [here](http://www.techarp.com/showarticle.aspx?artno#420&pgno5).
+You can find more general info about processor C-states [here](http://www.techarp.com/showarticle.aspx?artno=420&pgno=5).
## EST
* [ath(4)](http://leaf.dragonflybsd.org/cgi/web-man/?command#ath§ion4) - ~0.2W
* [snd_hda(4)](http://leaf.dragonflybsd.org/cgi/web-man/?command#snd_hda§ion4) - ~0.3W
-[Here](http://www.techarp.com/showarticle.aspx?artno#420&pgno4) you can find more general info about devices' D-states.
+[Here](http://www.techarp.com/showarticle.aspx?artno=420&pgno=4) you can find more general info about devices' D-states.
*More to come ...*