Benchmark Reviews posted a review on the AMD Phenom II X3 720 BE Black Edition AM3 CPU

Three is a number not normally associated with processors, although it's actually gaining momentum thanks to Intel's triple-channel memory architecture that caters to the 3GB sweet-spot for Windows XP. Dispite this, a triple-core processor just doesn't seem natural to many of us, because we're so used to seeing everything come in twos. But three isn't a bad thing at all, because AMD's Phenom II X3 720 BE processor is actually quite good. Benchmark Reviews compares the 2.8GHz Black Edition AM3/AM2+ CPU against the Intel Core i7-920 and other AMD processors. You might be surprised by how well the odd man out can fit in.

AMD Phenom II X3 720 BE Black Edition CPU Review