On 12/17/2009 12:51 PM, Mark Ryden wrote:
Hello, AFAIK, in windows 7, **32 bit**, there is a limit of 3GB physical RAM which can be recognized by the operating system. This means that if you have 4GB of RAM, only 3 will be used.
This is usually a BIOS limitation.
My question is:
- In Fedora 12 32 bit default installation , does the kernel knows
more than 3 GB of RAM ? what is the limit ?
The same. It uses what the BIOS tell it is available, unless you run a PAE kernel. The Physical Address Extensions allow you to address the full amount of your RAM.
- In Fedora 12 64 bit default installation , does the kernel knows
more than 3 GB of RAM ? what is the limit ?
64-bit does not have the artificial limitation (the actual limit is *much* higher than you can currently put in a machine today) that 32-bit does. You should see the same with Windows too.
Rgs, Mark