2012 Macbook Air 13in with the 11.6" Processor(i5 3317U) instead of the i5 3427U

I purchased a 2012 MacBook Air off of eBay from a reputable seller who refurbishes and fixes Apple products. I installed CPU-X and the processor says it is 3317U instead of the 3427U. So I guess it's possible to install the 11.6in processor to the 13in MBA? My MBA runs fine, no problems. And yes it is the 2012 and 13in, I can tell from the Magsafe 2 port and from the 1600MHz RAM. Here is a screen shot to better prove my point.