Boards to add?

I figure I should post about this here since finding these directly with Intel can be challenging.

Intel D915GMHLK LGA775
intel.com/support/motherboards/desktop/d915gmh/sb/CS-026955.htm

Dell 3E851

Any way to match my Dell 3E851 motherboard to determine which Intel D845 motherboard it is, in order to determine maximum processor upgrade?

Thanks!

Intel DG35EC

Just want to know what are the compatible processor that this motherboard support.

thanks

Intel El Paso

I'm looking for information on what P4 processors can be used in an Intel El Paso motherboard sold by Gateway:

support.gateway.com/s/MOTHERBD/INTEL/2513695/2513695nv.shtml