[luv-talk] Causes of anomalous difference in execution time same application, same OS, different boxes ?

Assembled cognoscenti; just idle curiosity really. I am wondering about , causes of anomalous difference in execution time, same application (FreeDVDDecrypter), same OS (XP x64), different boxes ? Box 1: Asus M4A79XTD_EVO; 16GB RAM;CPU AMD Phenom II x4 (4 core) 965 3.4GHz takes about 30min for 6GB DVD, with 1 core obviously flat-chat ~100% Box 2: Asus_P6T-intel-i7; 20GB RAM; CPU Intel i7 (4 core) 940 2.93 GHz takes about 10min for same 6GB DVD, with no core seemingly particularly active regards Rohan McLeod