To see how much of a performance hit Propus takes as a result of its missing L3 cache, we underclocked our Phenom II X4 965 chip down to the same speed as the Athlon II X4 630 – 2.8GHz – we also included benchmarks with the 2.8GHz Phenom II X3 720 to see how AMD’s triple-core CPU fares against the quad-cores.