Re: hardware problems with Vista 64..ram and Nvidia
- From: "Colin Barnhorst" <c.barnhorst@xxxxxxxxxxx>
- Date: Wed, 2 Jul 2008 17:15:13 -0600
Yes, I am familiar with the Option key for selecting the boot drive.
You need chipset drivers for the mobo. It is an Apple mobo, of course. Where are you getting the 64bit chipset drivers for Windows for the Apple mobo? I suspect that the memory controller needs the proper driver to see 8GB.
"Jim" <Jim@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:2C9844A6-CD70-40F3-9EE3-2FF2E1BA5801@xxxxxxxxxxxxxxxx
I forgot to mention that I do not use boot camp. The Mac Pro just boots up
to the last OS you were using. Only if you hold down the option key while
booting can I change OS.
Apple says that if you run Vista 32 bit, and boot up with either bootcamp or
just a straight boot their EFI/Bios has a limit on ram you can use....only
2gb, which is not a popular feature with anyone. But they say if you intall
Vista 64bit, there is no limit to ram Vista 64 sees...at least up to 128GB
that is.
So far that appears to be true.
I will see if I can get all my 8gb with Sp1.
"Colin Barnhorst" wrote:
I didn't see the Mac Pro part on the other ng. Sorry. That matters.
Have you inserted the Leopard dvd while running Vista? Did the driver
package autostart and install the Mac drivers for Vista for you?
I run a Windows partition on my MacBook Pro, but I have not attempted a
64bit Windows because of drivers. I'm not so sure that the Mac drivers for
Vista on the Leopard dvd include 64bit drivers at all. I'm pretty sure that
they are only 32bit. The Boot Camp main page at:
http://www.apple.com/macosx/features/bootcamp.html does clearly say "Boot
Camp supports the most popular 32-bit releases of Windows XP and Windows
Vista." It never refers to 64bit editions. That means that the Mac drivers
for Windows are almost certainly 32bit drivers only.
If you don't know for sure, check in the apple.com discussions accessed via
the support tab on apple.com.
"Jim" <Jim@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:5A6590FA-0EB9-47F2-AC00-71E48EF6F59F@xxxxxxxxxxxxxxxx
>I orginally posted over at Vista 64 but they suggested I try here.
> I just ungraded to Vista Ultimate 64 bit (I should add I also called MS
> techs but with no solution).
> I have 8gb of ram and Vista 64 only see's 4
>
> I have a Nvidia geforce 8800GT graphics card and downloaded the lastest
> drivers for Vista 64 bit. Vista see's the card and the correct driver
> version however on my performance index I get a 1. It should be > getting
> at
> least a 5.4. This card has 512mg of ram on it, plus it is one of there
> faster cards. On my Vista 32 it saw the full Nivdia and gave me a 5.7.
> So I
> would like to fix this as well.
> I do video editing so I need all the speed I need.
>
> I must add this too...I hope it is not a factor but I am running a Mac > Pro
> Intel.
> However I run Vista only, boot camp is set to vista and when I upgraded > I
> by-passed boot camp and did a full clean install of Vista 64 on a new
> drive.
> (I found I dont like Mac's) The Mac EFI (bios) will only allow 2gb for
> Vista UNLESS you go to Vista 64 and then all will be seen .... I called
> Apple
> support to make sure and they said yes, if you load Vista 64 all ram > will
> be
> seen. That is why I went to Vista 64. When I was with tech spport > (from
> India) they seem to think Vista 64 could only see 4gb but I hope that > is
> not
> true.
>
> Any ideas
> Jim
.
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