Intel Xeon G-stepping significantly reduces idle power consumption

Posted on Monday, Aug 13 2007 @ 21:36 CEST by Thomas De Maesschalck
The Tech Report found out that Intel's new Xeon processors with the new G stepping use much less power at idle. Power consumption at idle drops by as much as 25W on some models with this new stepping!
The bigger news that you may hear less about is the advent of the new G stepping of chips across the Xeon lineup. These chips are still manufactured using a 65nm fabrication process, but a combination of changes—including the ability to reach lower CPU multipliers and thus lower clock speeds—leads to much lower power consumption at idle for many Xeon models. Here are the numbers Intel presented to us on the reduction in idle power use for its quad-core Xeons.
Clock speed Front-side bus TDP Old idle power New idle power
Xeon X5365 3.00GHz 1333 MHz 120W 50W 25W
Xeon X5355 2.66GHz 1333 MHz 120W 50W 25W
Xeon E5340 2.33GHz 1333 MHz 80W 30W 25W
Xeon E5330 2.00GHz 1333 MHz 80W 34W 34W
Xeon E5320 1.86GHz 1066 MHz 80W 30W 30W
Xeon E5310 1.60GHz 1066 MHz 80W 34W 34W
Xeon L5335 2.00GHz 1333 MHz 50W N/A 24W
Xeon L5320 1.86GHz 1066 MHz 50W 24W 24W
Xeon L5310 1.60GHz 1066 MHz 50W 24W 24W

And for the dual-core Xeons:

 

Clock speed Front-side bus TDP Old idle power New idle power
Xeon 5160 3.00GHz 1333 MHz 65W N/A 8W
Xeon 5150 2.66GHz 1333 MHz 65W 24W 8W
Xeon 5140 2.33GHz 1333 MHz 65W 24W 8W
Xeon 5130 2.00GHz 1333 MHz 65W 27W 27W
Xeon 5120 1.86GHz 1066 MHz 65W 24W 12W
Xeon 5110 1.60GHz 1066 MHz 65W 15W 6W


About the Author

Thomas De Maesschalck

Thomas has been messing with computer since early childhood and firmly believes the Internet is the best thing since sliced bread. Enjoys playing with new tech, is fascinated by science, and passionate about financial markets. When not behind a computer, he can be found with running shoes on or lifting heavy weights in the weight room.



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