Windows 7 No 4GB (32bit) and in 64bit BootCamp drivers do not work!!!

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Windows 7 No 4GB (32bit) and in 64bit BootCamp drivers do not work!!!

Hello. I have a MacBook 3,1 (late 2007 model) with 4GB RAM. Under Windows 7 32bit, only 2.96gb Ram is useable and the Boot Camp drivers run fine. How do I get Windows 7 to recognize the entire 4GB? I have used bcdedit /set pae ForeceEnable and that doesn't do anything, still 2.92gb useable not 4gb although W7 recognizes the 4Gb as available? How to enable to fully?

Second, 64bit Windows 7 recognzes the full 4gb but the Boot Camp drivers do not install at all! Hence, no mouse, sounce is crap/unusable, and the rest of the Apple devices are crap. I have downloaded BootCamp 2.1 update but in 64bit Vista, when I run BootCampx64.msi it sells me "Bot Camp x64 is not supported for this model." Hence, the 64bit drivers do not install DESPITE a 64bit OS.

I went to the Genius Bar but the guy was an oaf and didn't know anything helpful. Help please!?!!!

Help please.

Macbook 3,1, Mac OS X (10.5.7), 32 & 64bit Windows 7

Posted on Jul 7, 2009 6:45 PM

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Answer 1

Jul 7, 2009 9:48 PM in response to MC_MAC

That is because 32bit version do not support 4 gigs of memory. It only supports up to 2 gigs even though it can read more than that.

Windows 7 is not fully supported as it is not released yet. You might be able to find some Windows Vista 64bit drivers for it but there is no guarantee that it will work.

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Answer 2

MC_MAC Author

Level 1

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Jul 8, 2009 3:05 AM in response to whitedragon

whitedragon wrote:
That is because 32bit version do not support 4 gigs of memory. It only supports up to 2 gigs even though it can read more than that.

Windows 7 is not fully supported as it is not released yet. You might be able to find some Windows Vista 64bit drivers for it but there is no guarantee that it will work.

You are incorrect! I am UPGRADING from Vista 32bit which supports 4GB of RAM with SP1. If you read my original post, you will see that I already tried the Vista 64bit drivers in Windows 7 64bit.

Windows 7 is downloadable from Microsoft and also supported already by Parallels v4 and the latest Fusion.

Hence, my original questions stand: How can I enable fully enable 4GB in Windows 7 32bit? Or, install, with Windows 7 64bit, install the correct Boot Camp drivers?

As I said, when brunning the Vista 64bit Boot Camp drivers in Windows 7 64bit, it says "Vista x64 Boot Camp not supported on this model."

Anyone have any suggestions?

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Answer 3

The hatter

Level 9

61,031 points

Jul 8, 2009 4:15 AM in response to MC_MAC

You can edit the line in the installer that checks for something, not sure what but I know it is pretty easy.

http://forums.macrumors.com/forumdisplay.php?f=86

Apple uses EFI and for some reason, the way it emulates a PC BIOS means that you probably have to use 64-bit Windows.

Some people bypass the Apple Setup.exe and install the individual parts they need.

When I went to install BC 64-bit there was a Microsoft "known to cause compatibility issue" but also option there to ignore and bypass, unlike what you saw from Apple.

So try editing the installer script if you can't find 64-bit drivers.

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Answer 4

Jul 8, 2009 4:44 AM in response to MC_MAC

look into this forum: http://forums.macrumors.com/

here you find boot camp 3.0 and other hints ...

be sure, my mbp 3.06 ssd, has also win7 rc1 (32bit) and the important drivers for the keyboard are all working best !

but it takes also some time to get them running !

p.s. for the mbp3,1 it's much easier, you don't need bc 3.0 it will do it all with bc 2.1 ..

the sound driver could be sigmatel, this is on the osX dvd (1) that came with your computer, or realtek, here you have to download the latest "high-dev" and restart twice; you must install all needed drivers seperatly as "problem, worked before with vista", mostly right click ..

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