All that we know of performance loss comes from Intel and Microsoft so far and a couple of anecdotes from tech sites. What little data there is shows the loss is not insignificant in some use cases.
I just had a communication from Intel stating "the typical home and business PC user should not see significant slowdowns in common tasks such as reading email, writing a document, or accessing digital photos."
That says nothing of picture editing video rendering and a whole host of more advanced tasks. I think that omission is telling.
Whatever..the performance loss will be the same on any motherboard for any class of processor.
