Re: Reduce Vista Video memory allocation

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No it didn't. Here's the situation:

All 32-bit client versions of Windows (not just Vista/XP) have a 4GB
address space. That's the theoretical upper limit beyond which you can
not go.

But you can't use the entire 4GB of address space. Even though you
have a 4GB address space, you can only use *around* 3.1GB of RAM.
That's because some of that space is used by hardware and is not
available to the operating system and applications. The amount you can
use varies, depending on what hardware you have installed, but can
range from as little as 2GB to as much as 3.5GB. It's usually around
3.1GB.

Note that the hardware is using the address *space*, not the actual
RAM itself. The rest of the RAM goes unused because there is no
address space to map it too.

Yes, I am using 32bits OS, and aware about the 4GB limitation. 64Bits
applications are not as available as 32bits yet, and this is the fact
I can't change now.

However, I do not understands why the Hardware used up 800MB, isn't
that just too much?

x86 is having a different address spaces for I/O and RAM. Only the
Video needs to share the RAM address space because of performance
issue (HDD and etc uses DMA which doesn't consume RAM as Video). I am
just wondering if it si not the Video driver then who else is using up
the RAM?

I need more RAM because I am doing some testing recently and need to
fireup at least 3 Virtual PC together, toether with VS2008 and a bunch
of other memory hungry softwares
.

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