Is a i5 better then a Dual Core?

Similar questions are ofen ask by shoppers who want to select there next computer. To confuse you a bit - a i5 is a Dual Core although there are i5 processors with four cores. i3, i5, i7, Pentium or Celeron are marketing terms of Intel and mean close to nothing. There are diffrent generations with diffrent feature sets out of them and they even released a modern a two core Pentium processor right as late as 2014.

Transistor - How to judge a processor

Now a days most of you just a processor by it's operating clock frequency and number of cores. But there is much more to a processor then jsut that. Manufactors used the chip area to add a lot of advanced and specilized processing features the releave the man exceution unit. A good basic metric is the number of transistors on that processors contains.
4004 : The first micro processor from Intel, the 4004, was a 4 bit processot - 2,300 1971
8086 : 29,000 1978
Intel 80386 : 275,000 1985
Intel 80486; 1,180,235 1989
Pentium 4 Willamette: 42,000,000 2000
Core 2 Duo Conroe 291,000,000 2006
Core i7 (Quad) 731,000,000 2008 Quad-core + GPU Core i7 1,400,000,000 2012 10-core Xeon Westmere-EX 2,600,000,000

All Confusion Names and numbers

Intel has codnames for Haswell is the codename for the Intel processor microarchitectur

ynnfield was the codename for the four core desktop Intel® Core™ processors ynnfield was based on Intel microarchitecture codename Nehalem and launched in September 2009.

Status: Draft Date: 2014-10-15 00:23:19 +0200 (Wed, 15 Oct 2014) Revision: 27

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