[BALU] 64 bit systems

Jim Vines jgoodguy at charter.net
Fri Jun 8 11:30:38 CDT 2007


two hundred fifty six thousand gigabytes for the 48 bit.

I think, sixteen gigas of gigabytes for the 64 bit.

A gig is 10 to the 9th and 64 bit address space can handle 10 to the 18th.

Jim

Mr. Panzer wrote:
> ok so how much ram we talking about?
>
>
> Panzer
>
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>
> 10 second quickie not long enough for you? Try it for 24 hours. 24 
> Heures du Mans
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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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