IS7, at first i thought it was LS7 then after looking at the boardi realized it was an I
theres like no room for a heatsink on there unless those "clamps" go in between the fins on the heatsink to hold it down. that would be an easier way as opposed to intels stupid "clips" way those things are a pain in the ass to get off and the stupid fan is always a PITA to put on the heatsink....