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141
votes
19answers
23k views

32-bit vs. 64-bit systems

What are the differences between 32-bit and 64-bit systems? If you have used both of them, what kind of sharp differences have you experienced? Would it be a problem to use 32-bit programs on ...
26
votes
9answers
120k views

How can I enable PAE on Windows 7 (32-bit) to support more than 3.5 GB of RAM?

I know that Windows XP 32-bit can be configured, through PAE, to support more than 3.5 GB of RAM. Is there a good tutorial to do this with Windows 7 32-bit? As to why I don't simply use 64-bit ...
57
votes
6answers
10k views

How does a CPU 'know' what commands and instructions actually mean?

How does a processor 'know' what the different commands mean? I'm thinking of assembly level commands like MOV, PUSH, CALL, etc...
11
votes
10answers
40k views

How can I determine if the current version of Windows is either 32-bit or 64-bit from the command line? [duplicate]

What's the command line to find out if the OS is running a 32-bit version or 64-bit of Windows?
14
votes
2answers
587 views

Why are newer generations of processors faster at the same clock speed?

How come, for example, a 2.66 GHz dual-core i5 will be faster than a 2.66 GHz Core 2 Duo (also dual-core)? Is this because of newer instructions that can process information in less clock cycles? ...
9
votes
6answers
46k views

What's the main difference between Intel processor generations?

What are the main differences between each processor generation of Intel processors/chipsets? Is there a performance difference? I've already seen processors from first to sixth generation, however I ...
8
votes
3answers
7k views

Why can't Windows 7 be installed on a ARM processor based system?

Today I was reading some news(1, 2, 3, 4) about Microsoft Windows 8 and saw that one of the new features is that it can run over a ARM processor based system. This make me wondering the reasons that ...
3
votes
3answers
533 views

“Processor register” and “IO register”

I was wondering if processor registers and IO registers are the same concept? Are they registers in CPU or in some IO devices? I picked up IO registers from this Super User question.
5
votes
3answers
4k views

What do the terms “asynchronous” and “synchronous” mean, with respect to the definition of an interrupt?

Quoted from http://en.wikipedia.org/wiki/Interrupt: an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in software indicating the need for a change ...
3
votes
1answer
224 views

Why do we need multiple levels of cache memory?

In general a cache memory is useful because the speed of the processor is higher than the speed of the ram (they are both increasing in speed but the difference still remains). So reducing the number ...
0
votes
2answers
422 views

Using 32bit application in 64bit

I am using windows 32 bit VLC media player in 64 bit pc. It is working fine. but my question is that won't it allocate memory according to 32 bit structure? That means though i have 64 bit PC, i ...