Benchmark Results: A/V Encoding
Proof that Apple's media software isn’t optimized for more than two threads is seen when the weakest processor—when clocked higher—beats everything else in iTunes.
Lame shows the stock speed $1,250 and $2,500 systems with exactly the same performance, which is expected for two machines that have the same processor. Yet, the cheaper of these takes a huge lead when overclocked, thanks almost entirely to its oversized CPU cooler and, by extension, its larger case.
TMPGEnc and Mainconcept love quad cores, and the $1,250 machine’s better overclocking capability again puts it ahead.