I wonder what the "official" max ram is for your motherboard. I had a Compaq
box that "officially" only supported 3x128mb (384mb). At one point I pulled
a 128 and added a 256 to take it to 512mb and it worked like a charm. Buoyed
by my success, I tried to add two more 256 to go to 768 and although all of
it was recognized in the bios, when the system booted (XP), it crawled so
slow that it was unusable. It easily took over 30 minutes to start-up and
then probably 20 more to choose shutdown. I suspected a bad memory module
but further experimenting revealed that all combinations > 512mb displayed
this behavior while any combination of 512 or less was fine.

"Squibbly" <notreal@tostopspam.com> wrote in message
news:uP4L1pPYHHA.3656@TK2MSFTNGP05.phx.gbl...[color=blue]
>i upgraded and vista recognised, but it started booting up very slowly
>
> "Grandecom News" <gargoyle@grandecom.net> wrote in message
> news:060B4BB6-E850-4DBE-9354-884E695335C5@microsoft.com...[color=green]
>> have Windows Vista Premium on a Dell 1501 Inspiron.
>>
>> I replaced X2 512 Ram with X2 1024 Ram.
>>
>> The system Bios reports:
>>
>> 633 System
>> 1964032 Extended
>>
>> Bios Version 2.1.0
>>
>> Windows Vista still reports memory as being 895. (ATI Radon Xpress Video
>> Hyper memory takes up 319).
>>
>> How do I fix this?[/color]
>[/color]