4 GB of RAM in x64

[Guest Gabriel Perez]

why windows 64 bits either xp or vista can use 4 GB of RAM and 32 bit

version only report 3 GB , what happened to the other GB , is it idle? or

simply cannot be addressed

 

thanks

[Guest Theo]

Re: 4 GB of RAM in x64

 

Because that is a design feature of the Intel 8086 chip

dating back to the early 1980's when it was perceived that

no one would ever have that much memory nor need to approach

that memory limit! It's called a memory hole. It's just

below the 4GB boundary and that is where the BIOS

information is place when the system boots.

 

 

Gabriel Perez wrote:

> why windows 64 bits either xp or vista can use 4 GB of RAM and 32 bit

> version only report 3 GB , what happened to the other GB , is it idle?

> or simply cannot be addressed

>

> thanks

[Guest Carlos]

RE: 4 GB of RAM in x64

 

Gabriel:

Here's what you are looking for:

http://support.microsoft.com/default.aspx/kb/929605/en-us

Or...

Aqui esta lo que estas buscando en español:

http://support.microsoft.com/kb/929605/es

 

Carlos

 

"Gabriel Perez" wrote:

> why windows 64 bits either xp or vista can use 4 GB of RAM and 32 bit

> version only report 3 GB , what happened to the other GB , is it idle? or

> simply cannot be addressed

>

> thanks

>

>

[Guest miso@sushi.com]

Re: 4 GB of RAM in x64

 

On Aug 2, 8:33 am, "Gabriel Perez" <gabriel2...@msn.com> wrote:

> why windows 64 bits either xp or vista can use 4 GB of RAM and 32 bit

> version only report 3 GB , what happened to the other GB , is it idle? or

> simply cannot be addressed

>

> thanks

 

Just as a reminder, some motherboards require a "memory remap" to see

all the DRAM.