Bear in mind that a lot of the mobos for the Pentium D will usually take earlier-grade Core 2 Duos and Pentium Dual Cores with just a bios flash. Should be able to pick those CPUs up nice and cheaply these days and power usage figures are miles better.

The motherboards are in the council tip now. Dell and Packard Bell, so probably proprietary fittings anyway. Sold the p4d for a fiver on eBay but accidentally posted it to the wrong person :-$