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AMD's 'Barcelona' cuts power one core at a time
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Written by Gizmo   
Monday, 12 February 2007 10:06
AMD's elaborate and lengthy four-core processor striptease continues this week with some geeky revelations around power saving technology.

Read the full story at The Register:

At the ISSCC (International Solid State Circuits Conference) in San Francisco, AMD will talk up "Enhanced PowerNow!" – the latest iteration of its power tweaking technology due to appear in the four-core "Barcelona" version of the Opteron chip.

While the PowerNow! tools in today's Opteron still warrant an !, according to AMD, the Enhanced tools are altogether more fantastic. Most notably, the technology makes it possible to control the frequency and power of each core individually.

"What we have today with the dual-core Opteron and PowerNow! is nice," Brent Kerby, AMD's Opteron product manager told us. "We show up to a 75 per cent power savings at idle.

"The limitation is we can only lower the performance state to the highest utilized core setting no matter what's happening with the other one. With the Enhanced PowerNow!, you can tweak each core to deal with the demands of a software workload."

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