dell optiplex 755 cpu upgrade fail
i installed the intel core 2 extreme

( supposedly quad core ) q6700 2.66ghz 1033 mhz cpu in my dell optiplex 755. upgradeing my intel core2 duo 2.66 cpu. ( lined up same way in socket lga 775 ).

i turne on computer and immedietly get error.------ system halted.

alert! incompatible cpu detected.

am i suppose to put some conversion sticker on it or what??

please help