well i did some looking, cant find any real info as to which micro codes where added when. im going to have to say yes it will from this site and info listed.
http://www.lejabeach.com/DFI/dfiinfinity965s/
that should be for that board but being so long ago and DFI no longer around nor any backup of their site. as i dont recall them ever having more then one p965 based board. i would suggest a bit of digging to be sure before using the bios's listed on that page.
any way, if you look at this entry
it may have added that cpu or later ones. there are beta bios's listed and show them adding support for 1333fsb cpus and another with 45nm cpu support. which is why im saying yet it will work on that board.