AMD Athlon II X3 425 2.70 GHz
 

AMD's Athlon II X3 425 offers all the features of the of the more expensive Quad Cores, and you can potentially unlock the fourth core. Being priced at only $79 it creates tough competition for Intel in this segment, but also for AMD who has a number of other processors in this market. Even though it lacks the L3 cache it still offers decent performance, especially considering its price. http://www.techpowerup.com/reviews/AMD/Athlon_II_X3_425