The Intel® Pentium® D 805 was a socket 775 and would be compatible with the following chipsets 945G, 945GZ, 945P, 945PL, 946GZ, 946PL, 955X, 975X, G965, P965, Q963, and the Q965. So a motherboard that is using one of these chipset will most likely be compatible with that processor. Also there may be some boards that are produced by other manufacturers which may also support this processor.