1 x 5.51" - 1600 rpm - Socket R LGA-2011, Socket B LGA-1366, Socket H LGA-1156, Socket H2 LGA-1155, Socket H3 LGA-1150, Socket T LGA-775, Socket FM2, Socket FM1, Socket AM3+, Socket AM3 PGA-941, Socket AM2 PGA-940 Compatible Processor Socket