x64 processor?

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[sox7000]

Hi all,
Is the 64bit processors is actually have a 64bit bus width and the x86 have 32bit?

[Xtreview]

In computer architecture, 64-bit integers, memory addresses, or other data units are those that are at most 64 bits (8 octets) wide. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
For instance, many current machines with 32-bit processors use 64-bit buses (e.g. the original Pentium and later CPUs), and may occasionally be referred to as "64-bit" for this reason .
the main update with 64 bit processor is the larger memory support.
The emergence of the 64-bit architecture effectively increases the memory ceiling to 264 addresses, equivalent to 17,179,869,184 GiB, 17,179,869 terabytes, or about 16 exabytes of RAM

if you refer to the system bus then most today processor are 128 bit .
Hope this help 

[sox7000]

if you refer to the system bus then most today processor are 128 bit

Thats exactly what I'm talking about

i know that 10years ago cpus had a 64bit system bus and the sdram had a 32bit bus width so the cpu used to utilize the sdram modules in pairs

my question is that x86 processors refers to 32bit while x64 refers to 64bit so is it it's system bus width or as u mentioned that most processors today have 128bit ------>so a FSB of 1333Mhz leads to a bandwidth of 1333*128/8=21.33GBytes

[Xtreview]

Here we are referring to the memory system bus (128 bit)
Here is a picture of intel P 965 motherboard bus :

So the processor to chipset is 64 bit , chipset to memory (2 x 64 bit) = 128biut

[sox7000]

my question is that x86 processors refers to 32bit while x64 refers to 64bit so is it it's system bus width

so it's all about the amount of memory that the system can address

[Xtreview]

Yes this is the main advantage  .
64-bit architectures indisputably make working easier with large data sets in applications such as digital video, scientific computing, and large databases

[princee18]

The x64 architecture, when combined with Windows XP Professional x64 Edition, can run the thousands of 32-bit programs available today. The x64 architecture also lets a developer enter whole new areas with the advanced capabilities that 64-bit processing makes possible.