[BALU] 64 bit systems

Mr. Panzer panzermkz at hotmail.com
Fri Jun 8 11:02:27 CDT 2007


ok so how much ram we talking about?


Panzer



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>From: Thomas Stover <thomas at wsinnovations.com>
>Reply-To: members at lists.bham-lug.org
>To: members at lists.bham-lug.org
>Subject: Re: [BALU] 64 bit systems
>Date: Fri, 08 Jun 2007 10:49:46 -0500
>
>The physical address space is 48 bits, so that limits the amount of real 
>ram in the system. However from a process's point of view the "virtual" 
>address space is 64 bits, and that could still be utilized with file 
>mapping and /or  NUMA  machines.
>
>jim wrote:
>
>>Is not the address space only 48 bits, 256 terabytes
>><http://en.wikipedia.org/wiki/Tebibyte>.    (I am looking foward to
>>buying 1 terabyte[1000 gigabytes] surplus memory). and the actual Ram only 
>>40 bit addressing or just 1 terabyte of RA.
>>
>>But the registers and data width are 64 bits are they not.
>>
>>I think the 40 and 48 restrictions are only for memory ops.
>>
>
>
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