Take Ethernet. You probably hadn't thought twice about that gray Ethernet cable on the floor, but an IEEE task force has been staring at it for well over a year, trying to make the darn thing more efficient.More info
The goals of the IEEE 802.3az task force are pretty straightforward: define a mechanism to reduce power consumption during periods of low link utilization and a protocol to coordinate transitions to or from a lower level of power consumption. It'll work only on new hardware, of course, but that hardware should be fully backward-compatible.
Parsing through some of the publicly available documents yields an awful lot of complex circuit diagrams ... and a bit of interesting information. According to a presentation by Hossein Sedarat of semiconductor manufacturer Aquantia, "channel staggering" in combination with a few other technologies may lead to a 75% power savings. That's in 10GBase-T, a wicked fast form of Ethernet. But it's not unreasonable to guess that ordinary 100MB Ethernet could see similar savings.
IEEE to make Ethernet greener
Posted on Monday, September 08 2008 @ 1:02 CEST by Thomas De Maesschalck
IEEE has a task force working on a new Ethernet standard that may lead to 75 percent power savings. The final spec is expected in March 2010.