Linked by Thom Holwerda on Sun 22nd Jul 2007 15:26 UTC
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32 bit address bus translates to 2^32 addresses, that much is true.
But, it doesn't mean that an OS running on a CPU with 32 bits address bus can only do 4 GB.
Here's how it can be done:
http://en.wikipedia.org/wiki/Physical_Address_Extension
Solaris, Linux and Windows XP all support more than 4 GB of physical memory while being 32 bit for example.




Member since:
2005-07-06
The original i386 could only address 4GB RAM. It had only 32 address bus lines.
The first x86 to break this barrier was the Pentium Pro, which had 36 address bits, hence 64GB RAM.
I don't know of any processors that can address 64TB of RAM.