The brand of the card has more to do with stability than the actual chipset.
I have had very good luck with Gigabyte cards using either ATI or NVidia
chipsets. The ATI seem to have a crisper display. With ATI you can buy ATI
branded cards direct from ATI which have support from the chipset
manufacturer. As far as I know there are no NVidia branded cards.
As far as ATI vs. NVidia, currently the drivers that are built into the RTM
release are the most stable for both. I'd give a slight nod to ATI but some
people have had problems with the sleep function on some motherboards.
Changing to an NVidia card often fixes this. By the time Vista is publicly
available this will probably change. In the past I have have found that
overall ATI drivers (without installing the Catalyst Control Center) are the
most stable but this changes as new drivers are released. I usually install
the drivers that came with the card and never change them unless there are
problems. Note - this is for business use. For gaming it's a whole different
story.
--
Kerry Brown
Microsoft MVP - Shell/User
http://www.vistahelp.ca
"joymac" <joymac@community.nospam> wrote in message
news:80AB43C2-4B5C-41DE-A8CE-E44131ADFB35@microsoft.com...
>I am presently running vista ultimate on a amd Athlon 64 x2 with aNvidia
> Geforce 7300 gs microsoft drivers as I had some troubles with Nvidia
> driver
> installing and am going to wait till driver is out of bata before trying
> again. Performance index is only 3.2 on business and gaming graphics same
> machine using RC2 and Nvidia driver result was 3.4. I have the task of
> upgrading serveral machines to Vista shortly and am tring to get a idea of
> the best cards to use on slighly less powerful machines but must have dual
> monitor support vga/dvi vga/vga or dvi/dvi. Not lookng for company loyalty
> responces. Thanks
> --
> Trying to make sense of it all