Sorry for me english (i'm italian...) I don't know if the performance is increased, but i'm sure.. the DirectX updates resolve some problems of the DirectX... Example: Install Windows XP SP2, WMP10, WMPEncoder9, the drivers of your system & PCMARK 2004.... the PCMARK 2004 encounter an error if you don't update DirectX!!! Hi Sorry for me english (i'm italian...) I don't know if the performance is increased, but i'm sure.. the DirectX updates resolve some problems of the DirectX... Example: Install Windows XP SP2, WMP10, WMPEncoder9, the drivers of your system & PCMARK 2004.... the PCMARK 2004 encounter an error if you don't update DirectX!!! Hi