The KB article in the following link may prove helpfull:
http://support.microsoft.com/kb/929605/en-us
If you are using DDR2 memory are you using 4 Dimms or 3. With some MOBOs
Vista does not seem to like the fact that all memory is not running at the
same speed if you are using an odd number of DDR2 dimms.
"LarryC" <(E-Mail Removed)> wrote in message
news:6F4ADA6B-D48B-4E59-A522-(E-Mail Removed)...
> Things to check.
>
> Make sure your BIOS is the latest and that the BIOS settings are correct.
>
> Make sure your memory is not defective. Even though they are new and it
> boots up doesn't mean that your new RAM is not defective. Make sure all
> your
> memory are of the same brand and make.
>
> Check your power supply. Just because it turns on doesn't mean your power
> supply is giving out proper voltages.
>
> Best advice I could make though is to call your Motherboard manufacturer
> for
> tech support or visit their user forum. I don't think it is a Vista
> problem
> but hardware issues. You might want to double check the Vista hardware
> compatiblity list to make sure your components are Vista certified. If
> not,
> your just beta testing your hardware.
>
>
>
> "Ward Taylor" wrote:
>
>> Good Day
>> After upgrading my system from 2GB to 4GB of ram, I am having problems
>> with applications that display anything in 3d. This includes unreal
>> tournament as well as the built-in vista "media center" and aero. I do
>> not run with aero enabled, but tried it just as a test. After a reboot,
>> I can load an application that uses 3d once, and it will work fine, game
>> plays great, or I can watch a dvd. Upon trying to load a 3d application
>> again, the frame rate is abysmal, < 1 frame per second. This then also
>> affects 2d apps, they do not refresh areas of the screen in a timely
>> fashion. This happens with both the builtin vista drivers for my
>> graphics card and the latest 101.41 from nvidia. Dxdiag reports that my
>> video card has 487mb approx total memory, when it actually has 128mb
>> onboard, and the agp aperture size is also set to 128mb Other than this,
>> the system runs great. I am thinking that this is a driver issue, but
>> was wondering if anyone else had a similar experience or know of a work
>> around.
>> System specs:
>> Tyan 2875 m/b
>> 2 opteron 246
>> 4 gb ram
>> Gigabyte 6800 based agp video card w/128mb
>> Windows vista ultimate x64
>> Thank you for any and all replies
>>