Can i upgrade the processor of my macbook?

No, you can't. What you buy is what you get.

 

Your only option would be to return it and reorder the i7 model...

 

It's soldered on to the motherboard, so you'd better be really good with a soldering iron

 

Yes. (click for how-to)

Here's 480 GB for 2012 MBA: http://eshop.macsales.com/shop/SSD/OWC/Aura_Pro_Air_2012

 

You have up to 14 days from the date of purchase to return it and get the one with the faster CPU.

 

My first question would be why? Unless you have a specific need for the i7 I'd stick with the i5. I went for the i7 on my 2011 MBA, but given my usage if I had a do over I think I'd go with the i5. I wouldn't go with the i7 over the i5 because you 'think' you need a faster processor. If you 'know' you need a faster processor it's a different story, but there aren't a lot of cases where the i7 is a must have. Upgrading to a larger SSD is probably a better use of your money and certainly far more doable.

 

This would be pointless anyway. The final cpu step on the Air is beyond negligible, and even if you could, why would you drop $300~ on the part (according to intel's lookup) to do it yourself? If that one is too slow, you should just return it in favor of a macbook pro.