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Dell :: BIOS CPU Settings For Latitude D630

In the BIOS on my Latitude D630 there is an option for the CPU to be seen as a single processor or as two processors. The CPU is a T7500 Core 2 Duo 2.2GHz processor.

The BIOS info states that some applications may run faster when it is seen as two processors. Can anyone give me any insight into what these options actually mean in terms of PC performance ?

Also, what types of application would be impacted by the single processor or two processor options ?

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