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  What is the difference between Intel i3, i5 and i7 Core processors
   
   
 
 
 
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24th Jul 2012, 3:28 PM
I am buying new computer and would like to know what is the difference between processor i3, i5, i7.

I see that they use different numbers of cores, but are there any other important differences?

changed: mat (25.7.2012 ob 05.51.25)
 
 
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25th Jul 2012, 4:49 AM
Hey Sensei,

the point is not really in different number of cores, as you can get i3, i5 and i7 with 4 cores. It's more about the number of threads (hyperthreading technology), amount of Cache and initially, the clock speed (MHz).

You probably want to know what hyperthreading is. In a few words, it's a technology that makes the Operating Systems like Windows or Linux to see like the computer has twice the more physical cores as it actually has. So if you have a computer with 2-core processor, to the operating system it seems like it has 4 cores. This means in some cases, depending on the program you are running, hyperthreading technology can make your computer execute tasks faster.

And to explain the Cache on CPU (processor). Cache is a small and superfast memory that stores stuff that is repeatedly needed and used by a running program and as such improves the overall speed of a computer. Because the Cache is directly on a CPU it makes things happen much faster as the main memory (RAM) which is much slower doesn't have to be addressed. So more cache, faster the computer.

And for a more obvious Intel Core i processor series comparison, read bellow.

Intel Core i3 Processor:

• for an undemanding user, that doesn't require a lot of speed just want the every day office applications to work
• 2-4 cores
• 2-4 threads
• 3-4 MB Cache

Intel Core i5 Processor:

• the middle one of the bunch, faster than i3 you can use it for more processor demanding tasks and can play the lastest games as well
• 2-4 processors, higher clock speed (MHz) than i3
• 2-4 threads
• 3-8 MB Cache
• turbo mode - user can turn off a core if it's not being used

Intel Core i7 Processor:

• the power-house of the bunch. Meant for the most demanding users like hard-core gamers, graphic designers, video editors and other resource intensive applications.
• 4 cores
• 8 threads
• 4-8 MB Cache

Hope it will make your computer purchase decision a bit easier.

changed: mat (25.7.2012 ob 04.58.30)
 
 
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27th Jul 2012, 4:45 PM
OK, I see there is also difference in Cache.

How important is the size of Cache. Is there a big difference between different sizes if you look at the performance?
 
 
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