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Highest clock frequency achieved by a silicon processor

Highest clock frequency achieved by a silicon processor
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Who
AMD (Advanced Micro Devices)
Where
United States (Austin,)
When
31 August 2011
The highest clock frequency achieved by a silicon processor was 8429.38 MHz by AMD’s "Bulldozer" as tested at AMD Headquarters in Austin, Texas, USA, on 31 August 2011.