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The model can take T9500,2.6,6MB . Its been tested by Dell and sure to work.
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Just installed a T8300, seemed OK at first, but noticed in the BIOS it says the CPU is currently running at 1.6 GHz, even though it sees it as a 2.4 GHz CPU. How can I make it run at 2.4 GHz? Speedstep is on in the BIOS.
This was the reason I replaced the T5450, even thought it was a 1.6 GHz CPU, it ran at 1 or 1.2 GHz.