i3 i5 i7, what to choose?

There are different type of intel processors. You may have heard i3 i5 i7 and latest i9. What makes them different? which processor to get when buying your computer? Many people are unaware of few facts about processors which could help them make better decision. I want to tell you something about these processors that may help you make better decisions in the future.

 First i want to tell you about what gigahertz means in the processor. Giga means Billion and Hertz means cycle per second. So, if your Processor is 2 gigahertz, it means you processor can calculate 2 billion calculation per second.

You also need to know about Core and Hyper-threading. There was a race with AMD and intel in the field of making the higher gigahertz processors. Until AMD came out with the Dule core version of CPU which have two cores. Which means it had two processors. Only increasing CPU hertz was not making CPU faster. It’s this new feature that has lower clock speed with dule core which out performed higher hertz CPU. So intel started to manufacture Due core.

Hyper threading is a feature in CPU that enable a processor to handle two process simultaneously. It’s like eating with two hands, while your mouth (CPU power) remains the same, your hands (Threads) can pickup more food and eat as soon as you are done. Your operating system shows this as two logical processors.

 In this Snapshot of my PC it shows it has 1 socket 2 cores and 4 logical processors. L1, l2,L3 cache which is also important in CPU that effect processor speed.

Instead of constantly gong to RAM to retrieve data CPU cache (Also Called static RAM) holds data that are frequently needed. There are 3 levels of cache.

Level 1 cache (primary Cache) runs as same speed as processor. Which is inside CPU itself.

Level2 Cache (external Cache) are used to cache recent data that are not caught by level 1 cache.

Level 3 Cache catches data that are not caught by level 2 cache. If its still not found. It will search data form RAM.

So what are the i3, i5,i7 ,i9 different generation for.

i3 have the basic functionality which have 2 core and Hyper-threading. It will have less cache and consumes less power. If your work is to surf internet and use ms office this is good enough for you.

i5 have 2-4 cores with or without hyper-threading. They have improved graphics and Turbo boost. Turbo boost is an ability of CPU to mac performance when needed. If you use Photoshop, some other normal software this is good processor for you.

All core i7 have hyper threading. 2 to 8 Cores 2-8 memory stick. It has better cache, faster turbo boost and better graphics than i5. You have to get this process if your job involves sound rendering, video rending, animation and Some high end gaming.

i9 processor have better of everything, better cache, better turbo boost, overclocking, Graphics. They are the high end processes and in current market that are not in use.

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