Computer Part-2. Processors!! What does i3,i5,i7 mean?

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Part-1 (Computer part-1) of computer was all about, how a computer takes in info.. In this part-2 of computer let’s see what a processor does and how to choose a processor!! This is still an arguable and ground breaking issue …

processor is commonly referred to as the CPU. It can process computer instructions per second measured in hertz. So, it is important to check the clock speed… Like 2 GHz, 2.5 GHz etc..

When it comes to processors, it might be of any company Intel or AMD, the specifications we need to look at, are the same. Few important specs are: number of cores,  32 bit or 64 bit, Cache.. Let’s see each of them,

 

Number of cores (multi-core) 

We are so much familiar with the words single core, dual core, quad core etc.. Dual core has two single cores and quad core has four single cores. In simple words a single core is like one calculator, a dual core has two calculators.

This does’n mean that a 2 GHz dual core is equal to a 4 GHz single core in performance. All this means is that you have two 2 GHz cores working for you instead of one. This is so important to understand the difference, most people confuse here in selecting.

As it goes above, dual core has two calculators and single core has one calculator, if we give an instruction, suppose a mathematical calculation, we can use only one calculator at a time. Having two calculators or having dual core doesn’t make our job any faster in this case. Same is the case with dual core.. Then what is the use in getting dual core or even quad core?? It is so simple answer, when we give multiple instructions or in this case two mathematical calculations. Then each mathematical calculation uses one calculator, with this the two tasks will be completed in very less time..

So, number of cores is equal to number of calculators.. In order to make use of all the cores present there is something called “multi-threading.” A program that’s multi-threaded – written for more than one core – can take advantage of a multi-core processor, even for only one operation by dividing  it among the cores. Multi-cores benefit isn’t necessarily one of speed, but one of smoothness.

It’s so important to know that the extra cores may go to waste. More than that, more cores means more power draw and with that more heat. In a notebook, these become serious considerations.

32 bit or 64 bit? How to choose?

 

Every  hardware component in a laptop requires what’s called an “address” and it is normally be occupied by memory. Your computer knows everything in it by its address, and everything uses memory addresses. So if you only have 4 GB worth of addresses, all the other parts are going to start eating into that, leaving part of the 4 GB of physical memory you have untouched. This is why when you put 4 GB of memory into a Windows XP or Windows Vista 32-bit machine, Windows doesn’t give you the full 4 GB – it may give you as little as 2.5 GB or as much as 3.5 GB, depending on the hardware you have in your machine.

What a 64-bit processor and 64-bit operating system does is dramatically raise the amount of memory your computer can address. By increasing this limit, it allows the computer to see the full 4 GB and still have room for everything else. Still, the move to 64-bit, provided you’re running at least 4 GB of memory can generally be beneficial.

Cache:

 

Cache is basically a memory, or RAM, that’s been built into the processor. if cache is so much faster than memory (and it is), why bother with memory at all? Why not just integrate all that memory into the processor itself? Because memory is physically huge. Sure, it’s not that big when you look at a processor or a stick of memory, but on a typical processor, the L2 cache takes up roughly half the die. So if as little as 4MB of cache takes up that much space, try to fathom how much space 1GB would need.

So, don’t worry much about Cache

Now, let’s see Intel’s i3, i5, i7 processors!!

As long as you understand the above specifications and what each specification does, you are good to go…

First of all,these terms correspond to processors from the specific brand of Intel.

Before you make a purchase though, you should really think about what you are going to do with you computer.  If you are just using your computer to email, surf the web etc…You will be just as fine with a Core i3.

If you are editing multiple files in Adobe Flash, with virtualization software, playing the newest RPG computer game you may notice the Core i5 to be much more faster. The Core i5 is great.

The Core i7 are the current most expensive and top of the line from the Core series of Intel processors. For most computer users, the i7 is probably much more than they’ll actually need or even think they need.  But, if you want the best of the best that will run your video rendering programs, giant RPG games, and many other higher technical programs, go for i7.

There are still lot more to talk about computer which we would do in the next part!!:)

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