Legit Reviews posted a review on the AMD Athlon II X2 255 Dual Core 3.1GHz Processor
A quote from the article:
>> AMD Athlon II X2 255 Dual Core 3.1GHz Processor Review
The AMD Athlon II X2 255 had a more than solid performance when putting through the paces today. It may not have performed as well as the Quad Core processors did, but keep in mind it is a dual core processor. When I ran the benchmarks on 1 core of each processor I was astonished to see the performance. The AMD Athlon II X2 255 was at or near the top of the list in those benchmarks. It was also able to overclock to 3.95GHz on air cooling, which is impressive for a $75 processor...
>> AMD Athlon II X2 255 Dual Core 3.1GHz Processor Review