Hello.. thanks for your answer.. it looks like if this mobo accept only pentium dual core.. in dell forums everybody says that core 2 duo does not work in this mobo.. ARE YOU SURE I can buy this core 2 duo e6xxx or e4xxx for this socket LGA775?.. Bye
But this is for a Dell motherboard so no it will not work the Pentium D is all that it will support.
The OP PMd me and said its for a Dell XPS
Some manufactures might have been able to get a bios to work withe Core 2 conroes but Dell never updated past Pentium Ds it wont even work with the Pentium D 965 extreme edition because the board can only handle an 800mhz FSB.
Yup thats it and in fact the OP said he has a Pentium D 940 in it when those came out it only had support for the old Pentium D 800 smithfields but they must of made a bios update for the presslers at some point.