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A 32 bit CPU and DDR2 64 bit lane?


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9 replies to this topic

#1 Philak1

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Posted 19 May 2014 - 04:26 PM

Probably a stupid question, please help me understand.

 



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#2 dicke

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Posted 19 May 2014 - 08:14 PM

Welcome,

Stupid questions are the ones you don't ask!

I'm not sure I understand the question so I can't offer and answer.

Maybe a restatement will help me out

Thanks


Stay well and surf safe [stay protected]

Dick E


#3 Philak1

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Posted 20 May 2014 - 01:16 AM

H, thank you for responding.

I am looking to by a new computer and believe I have read too much info for my brain.

I am confused over a 32 bit CPU that addresses at 32 bits at a time, and DDR DIMMS that have 64 bit lanes to address on the same system.

How does that work.

Cheers

Phil



#4 Platypus

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Posted 20 May 2014 - 01:46 AM

That's all taken care of by the memory controller. There's been a long history of systems where the CPU operation has used a different number of bits to the memory bus - in IBM compatibles right from the initial 8086 processor where it was the other way around (16 bit CPU with 8 bit memory bus). It just means it takes the memory controller less memory cycles to transfer a given amount of data across the wider bus, improving the throughput (bandwidth). A similar thing happens inside video cards, where the memory can be on 256 or 512 bit wide buses.


Edited by Platypus, 20 May 2014 - 01:49 AM.

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#5 Philak1

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Posted 20 May 2014 - 11:36 AM

Thanks for that Platypus.

Appreciate your time for responding, all is now clear.

Cheers.



#6 dc3

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Posted 20 May 2014 - 11:55 AM

What is the make and model of the computer you are considering to buy?

 

A 32-bit CPU is not generally sought these days as it has fairly significant limitations.  You will be limited to a maximum of 3GB of RAM and will only be able to use a single core CPU.

 

If you wish to read more about this you will find a good article at Computer Hope.


Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#7 Philak1

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Posted 20 May 2014 - 03:39 PM

Hi dc3,

Thanks for the link and the info and your time.

Very useful, things are starting to sink in. A lot to learn.

Cheers



#8 dc3

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Posted 20 May 2014 - 04:06 PM

There will always be someone around who can help you with any questions you have regarding computers.


Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#9 hamluis

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Posted 20 May 2014 - 05:12 PM

FWIW:  Most CPUs of the last x number of years...are 64-bit processors.

 

The only variable was the Windows O/S, which originally came as 32-bit only, then expanded to 32-bit and 64-bit versions.

 

A 64-bit O/S is generally considered more efficient than a 32-bit version of Windows...but the 32-bit versions work with any 64-bit CPU.  It's only the Windows versions that cause the confusion, IMO...because many don't realize that...unless your CPU is really old (by computer standards), the CPU can run both 32-bit or 64-bit versions of Windows.

 

32-bit or 64-bit version of Windows - http://windows.microsoft.com/en-US/windows7/find-out-32-or-64-bit

 

Louis



#10 Philak1

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Posted 21 May 2014 - 01:00 PM

Thanks Louis






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