I am not sure yet, but probably one of the Intel i5's.
Probably this one-
http://www.newegg.com/Product/Produ...215&cm_re=Intel_i5_750-_-19-115-215-_-Product
Probably this one-
http://www.newegg.com/Product/Produ...215&cm_re=Intel_i5_750-_-19-115-215-_-Product