What is the difference between PC's - 32 bit, 64 bit

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kamalza

Joined: 12 Jul 2006
Posts: 39
Helped: 1

17 May 2009 13:12 Help in PC hardware !!

Dears

I am asking about the difference between two PC's, one is 32 bit & the is 64 bit ?

And also is that the same when saying x64 & x86 ?

And what is the meaning of these numbers?

Thanks in advance

btbass

Joined: 20 Jul 2001
Posts: 1187
Helped: 113
Location: Oberon

18 May 2009 17:56 Re: Help in PC hardware !!

The 32-bit and 64-bit numbers usualy refer to the width of the data bus that connects the processor core to the memory and external peripherals ,and the size of the processors internal registers. Having a wider bus alows the core to access data at a higher rate and run faster.
Having wide internal registers allows the core to calculate larger numbers without the problems of register overflow.
An 8-bit register can only hold a maximum integer value of 255.
A 64-bit register can hold a very large integer, 2 ^ 64.

If you were to count up from 0 to max int 64.
And you counted 100 million counts per second.
It would take you 7,500 years before you finished!

GetDeviceInfo

Joined: 30 Mar 2009
Posts: 103

18 May 2009 20:32 Re: Help in PC hardware !!

and the x86 is the family tree that the processor developed through

kamalza

Joined: 12 Jul 2006
Posts: 39
Helped: 1

27 May 2009 8:04 Re: Help in PC hardware !!

GetDeviceInfo wrote:

and the x86 is the family tree that the processor developed through

And what is x64?

Thanks in advance

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sau_sol

Joined: 27 Feb 2008
Posts: 249
Helped: 27
Location: India

27 May 2009 8:08 Re: Help in PC hardware !!

x86 is used for 32-Bit processors
and x64 is used for 64-Bit processors which are based on same logic as x86
i.e. combining 2 x86

kamalza

Joined: 12 Jul 2006
Posts: 39
Helped: 1

01 Jun 2009 12:03 Re: Help in PC hardware !!

sau_sol wrote:

x64 is used for 64-Bit processors which are based on same logic as x86
i.e. combining 2 x86

Is that true? I think x64 is used with 32-bit?!!!!

sau_sol

Joined: 27 Feb 2008
Posts: 249
Helped: 27
Location: India

01 Jun 2009 12:14 Re: Help in PC hardware !!

This is from wikipedia
x86-32: 8 x 32-bit registers
x86-64 (or 'x64'): 16 x 64-bit registers

from msdn.microsoft.com

The x64 architecture is a backwards-compatible extension of x86. It provides a legacy 32-bit mode, which is identical to x86, and a new 64-bit mode.
The term "x64" includes both AMD 64 and Intel64. The instruction sets are close to identical.

link :--- http://msdn.microsoft.com/en-us/library/cc267760.aspx

AMD64/EM64T processors: They are implementations of the x86-64 processor architecture, commonly referred to as x86-64 or x64. The architecture is an extension of the x86 instruction set, which allows simultaneous 32- and 64-bit computing with no degradation in performance. The Xceed product specifically compiled for this architecture is named Xceed Zip for x64.

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