3 tier or N-Tier

Question

Hello ,

        I want to know that which is the best 3 tier Architecture or N-Tier Architecture when performance is mostly concerned in asp .net using C# .Net . i meant if i create separate N-layer for each page then it will improve the performance or if i merge two layer into one and create 3-tier then what about the performance , it will decrease the performance ? 

Plz Plz Reply .

Thx in advance