When I first came to know about computers in my early 20s most of them were running on Intel Pentium 4 processor. Later I bought a PC with Intel Core 2 Duo processor and now we are all hearing Intel Core i3, Core i5, Core i7 processors. What is the difference between Core i3, Core i5 and Core i7 processors? We all know one common thing that i7 performs better than i5 which in-turn performs better than i3.
Intel Core i3 vs i5 vs i7
In this post I will try to explain these processors function in detail. Earlier processors were ranked by their frequency or clock speed which is measured in MHz (megahertz) or GHz (gigahertz). But now we need to talk about cores, hyper-threading, turbo boost and cache.
A core is a processing unit that does reading and execution of instructions. Core i3, i5, i7 are multi-core processors which can process multiple instructions at once.
Typically a single core can process one instruction in a given time. But Hyper-threading makes single core to process 2 instructions at a time, which improves processing speed and applications run even smoother.
Every processor is set to perform at certain frequency or clock rate. Turbo boost makes use of all available resources to make processor perform at peak frequency. So that processor can handle heavy tasks.
And finally Cache. Cache is nothing but a memory that has history of instructions. Every processor has its own cache that keeps history of repeated data or tasks so that it performs them faster next time. More Cache more performance.
After knowing all the information let us look at what these processors got.
Core i3 is a dual-core processor with or without hyper-threading and has a Cache of 3 to 4MB.
Core i5 is a dual-core processor with hyper-threading and with or without turbo boost or a quad-core processor with or without hyper-threading and turbo boost. It has a cache of 3MB or 4MB or 6MB.
Core i7 is a dual-core or quad-core or Octa-core processor with hyper-threading and turbo boost. It has Cache of 4MB or 8MB or 20MB.
Usually Core i3 is recommended for home purpose or personal computing machines. Core i5 is recommended for gamers or for users with moderate tasks whereas Core i7 is recommended for heavy graphics work and game developers who does heavy tasks.
I hope now you understood the difference between Core i3, Core i5 and Core i7 processors. So next time when you buy any PC or Laptop do read processor specifications and buy based on your usage or requirement.