Reason for asking is that I am looking purchasing a computer that is advertised as using 4th generation chips, and it uses "Formally Ivy Bridge E" chips. Which appear to be 3rd generation not 4th generation. I contacted the seller and got a response that confused me even more (they are based on 3rd generation Ivy Bridge E but released as 4th generation??), so just trying to work out what the situation is.

Thanks