agp switched off - gart drivers??

Hi all....hope someone can help me here.

I recently formatted my hard drive and loaded windows XP. once it was installed, the first drivers i installed were my ATI drivers for my radeon x800 pro. I've since found out that that may have been a mistake. I should have installed my nVidia drivers first for the motherboard - sound, lan etc.
The pc now moves any window on the screen like a slideshow ie slowly removing it from one location and redrawing it in the new location. it also makes scrolling on a webpage an extremely slow process. Any program using any decent level of video will not work because agp is switched off. From what i can gather it seems my agp slot drivers (gart) are not installed. I've tried removing all the ATI drivers and using 800x600 vga then installing the gart drivers from the nvidia mobo disc but it makes no difference.
I've checked the bios and agp is enabled but when i install the ati drivers adn check the control panel it says agp is off. I switch it on but on a reboot all the agp switches are off again.

can anyone help me sort this out?

cheers!!

 

i completely removed all ATI software and the pc booted in 16 colour mode. i then installed my nvidia software and re booted. ATI software next and rebooted. And not for the first time once it had completed rebooting my monitor displays "no signal" and goes into standby. i rebooted several times and occasionally the display would remain blank and i could hear the windows start up sound - it's as if the machine is working fine with the monitor switched off. i have to reboot in safe mode and remove al ati software and im back where i started.
Rather bizarrely whenever i right click on the desktop it starts the installation procedure for the ati catalyst centre.
i'm still operating with a slideshow speed pc and i think i might have to reformat....again.....unless someone can come up with something i've missed.

 

thanks guys.

still experiencing the same problem though - even after a another format and reload.
i installed the nvidia drivers - the disk is for nvidia nforce 2 chipset (rev 68.02) and also labelled ASUS for my mobo.
As yet i've not installed the ATI drivers. If i don't install the nvidia drivers then my usb 2.0, nvidia sound and ethernet are disabled.

I never had this problem before and my mb and video card haven't changed.
what part of the bios should i check to make sure the onboard graphics are disabled and that my agp slot is working. I've checked that my initial graphics slot is AGP so it may be that my agp slot is already activated.

still struggling with a slideshow although processing speed is fine. it means i can't play any games or use intensive programs like photoshop or google earth.

 

i've already installed sp2 but i think i have the answer...........
i visited my local pc shop and he said to open the task manager and go to the performance tab. he said let the pc settle and then move the task manager window - if the cpu usage jumps then the pc is using cpu power to move it instead of graphics card power.
i tried it and it's exactly like he said - a large peak and 100% cpu usage just dragging the window around the desktop.
it seems that despite the device manager saying my graphics card is working fine, it isn't. It looks like the graphics card is not doing what it's meant to be so the cpu is having to work harder than it's meant to.
probably a different thread now......but if i've installed the latest drivers for my video card and it's acting like this....is it time for the bin? or is there something else i can do??
thanks for all your help and suggestions so far!!
Dave

 

Thanks for the input guys.....problem solved.
I borrowed a Radeon 9800 AIW from a mate and tried it. Hey Presto....pc behaving as it should.
i've since ordered a new card which i should have in a few days.
it seems my video card has died and a replacement card has proved it since it works perfectly well.

thanks again
David