There are lots of different MoBo's that support the 965 ( AM2, AM2+, AM3 ). If you have a specific brand/board in mind go to the manufacture's web site and check the CPU compatibility list.
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Phenom II X4 965 is an AM3 CPU which will work with in an AM3 motherboard, also AM3 is backward compatible with some AM2/AM2+ motherboards(which may require a BIOS update)