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.
Futuremak's synthetic benchmarks ranks Athlon II X3 425 quite high with performance being equal or even better than Phenom II X3 710. Apparently, L3 cache memory plays little part in these tests.
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.