|Kuwese is right. Here is what cpu's your motherboard can support.|
He prob assumed that you are talking about the Pentuim D 8xx/9xxx series which was based on the Pentuim 4 series and not the Pentuim D E-series which is based on the Core 2 Duo series.
A lot of people have made that mistake and that's basicly due to Intel's numbering confusion with the way they label their processors now of days. The LGA 775 platform was a clutterd mess when it came to cpu compatibility, It can be a headache trying to figure out what cpu is compatible with what chipsets especially when you get to the Intel LGA 775 945/975x chipset which was basicly a crossroads chipset between the Core 2 Duo and the old Pentuim D where you would have some LGA 945/975x motherboards that were capable of running Core 2 Duo's while other LGA 945/975x motherboards that weren't capable of running Core 2 Duo's.
Iron Sharpens Iron.