Yes, I have SP1. Vista is not that slow, but XP seems to be faster.
When i was installed XP, It was slower than Vista now.
Maybe Vista is kinda slow, but Vista SP1 is a lightning!
I have read a few reviews in the net and most of them could show that XP is indeed faster than Vista and faster than preview versions of Win 7. Also most games run faster on XP than on Vista. Often they even run faster on DX 9 than on DX 10.
Actually, You're wrong, DirectX 10 is faster than DirectX 9.
And the slow problem isn't in DirectX, The problem is in your Video Card.
