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This week's developments have included the revelation that this bug affects all "Barcelona" quad-core Opterons, leading to a "stop ship" order on quad-core Opterons to most customers. The erratum also affects all speed grades of Phenom processors, which are still shipping to PC makers and resellers. AMD admitted the presence of the erratum prior to the Phenom's public introduction, but the firm's initial statements gave many the impression that the erratum affected only the 2.4GHz version of the Phenom, which it had decided to delay. In truth, all current Phenom variants have the bug, and systems with those processors will have to be patched and suffer the accompanying performance penalty.
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