Intel Based Board

I have a Radeon 9500 and Sis 730s motherboard.Whenever i enable Agp texture acceleration by installing the motherboard AGP driver, the system
crashes whenever i run a direct3d application.
So i have to unistall the motherboard AGP driver to make AGP texture Acceleration as unavailble.
The system runs fine without the AGP Texture acceleration, so i wanted to know how much is impact on the video performance if i dont enable AGP texture acceleration, i mean is it really required.

to all those peeps who have newer vid cards and such, if u have Windows XP, install Service Pack 1 before installing DX 9.0/9.0a/9.0b and installing Drivers for the vid cards and Mobos.

Service Pack 1a that is and get newest Internet Softwarebefore installing SP1/1a if u use any besides what is built into Windows XP, and another thing Do not install AOL 8.0 because it has more problems than 7.0 but some people have gotten it to work.

Please stop posting that link in everytopic u get into.

I'm having trouble with my computer locking up in Doom 3. I have the new Doom 3 patch (Retail v1.05 beta patch), the newest catalyst driver (Sept.2004), and have used DriverCleaner and reinstalled it which helped some. I have a Radeon 9600 and WinXP. 9.0c DirectX.
I disabled PCI write and AGP write under advanced SmartGart and now it would seem so far that my trouble with Doom 3 locking up my computer after 15 minutes has stopped though objects that move really fast in the game aren't rendered well.
I had read that turning Fast write off might help with this issue but I'm wondering seeing I don't have "fast write" per say, which one of these, PCI or AGP write, can I leave on or do I need to leave both off?
Thank you. -Nathan
P.S. I read something about disabling "write combining". I tried just that and re-enabled PCI and AGP write but the 'puter locked again after about 10 minutes into Doom 3. So my main question remains, do I need to disable both PCI and AGP write to accomplish what was suggested by "disabling Fast write" or just one of them and which one. ;P

there is an official patch out for doom 3, get it.