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E6550 Compatibility issues

Hello I have a dell optiplex 745 with a Pentium d 3.0 and i just bought a Intel Core 2 Duo e6550 2.33 ghz but when i install the CPU the power light turn orange and the fan turns to high speed but no picture on the screen i have already tried flashing the bios to 2.6.4 hoping that this would resolve the issue but it has not.
Can some one please help.
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  1. Best answer
    http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf
    Your Dell only supports core2duo's with fsb of 1066MHz, the E6550 has fsb 1333MHz.
  2. Best answer selected by geektech4u.
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