Synthetic Benchmarks
Possibly the best known and widely used synthetic benchmark, 3D Mark Vantage tests the gaming performance of the PC. PC Mark Vantage on the other hand tests other performance aspects of the PC like video encoding, home entertainment multimedia features, working in an office environment, and basic gaming.
Athlon II X4 620 sits comfortably in the golden middle, not the fastest, but not too slow either, just trailing its main competitor Q8200.
3D Mark Vantage
PC Mark Vantage
wPrime 32M
Prime is a benchmarking application designed to use a highly multithreaded approach to calculate the square-roots of large amounts of numbers, primarily used by overclockers to check the stability and performance of overclocked CPUs.