Difference between 1st generation and 2nd generation processors

When you see these terms, I'm assuming you're referring to the i3/i5/i7, this is purely marketing. It's pretty meaningless, it's just for sales, makes it sound better. If you're asking this, you really don't need the technical. But what is important is the 2nd gen core i cpus are up to 20% more performance but use less power and they can usually be found for the same price.
 
Yup, it's like your first baby and then your second one, first one was tough and needs to be looked after a lot more, the second one just came off the assembly line and fit straight into the pram.
Jokes apart, 1 gen is the first lot of commercial processors sold out in the market after the processor has been designed , prototyped, tested and finalized.
Then, after and while, recovering the costs that went into making that processor, the company is still looking to improve it's processors, so while we are using them and giving a feedback, the company is also looking into what all can be optimized, so then again comes slight changes in design, minor altercations, samples, testing and gen 2 is now out in the market.
So the basic difference between the generations is Optimization.
 
The performance difference between Intel Clarkdale (1st gen, socket 1156) CPUs and Sandy Bridge (2nd gen, socket 1155) is more like about 10% - 12%; not 20%. Since they use different sockets you cannot stick a Clarkdale CPU in a mobo for Sandy Bridge. That applies to the reverse as well.

A major difference is that Sandy Bridge CPUs are the 1st Intel CPUs to have an integrated graphics core; Intel HD 2000 or HD 3000. The integrated graphics cores are better than Intel's old GMA 4500M graphics core. The Intel HD 3000 is slightly more powerful than a desktop Radeon HD 5450 graphics card.

 
The 1st generation Intel® Core™ processors were which used sockets 1156 and 1366 and shared the common microarchitecture and was released at 45nm. Between the 1st generation Intel Core processors and the 2nd generation there was a die shrink dropping them from 45nm to 32nm. The 2nd generation Intel Core processors which were released earlier this year and have a new microarchitecture were released at 32nm. These processors are using sockets 1155 and 2011 (which was just released today) and for the most part they have a 10% to 15% boost in performance over the 1st generation processors at the same clock speed and with the same number of cores.

Christian Wood
Intel Enthusiast Team
 

amit5172804

Honorable
May 7, 2012
1
0
10,510



Thanks Christian.

It's impressive to knew technical difference b/w G1 & G2 but can you elaborate more because in these days so many people asking regarding this .