Page File Size in x64
My thanks to Darrell Gorter once again. He posted a link today to a really useful KB article on the Microsoft site: http://support.microsoft.com/default.aspx?scid=kb;EN-US;889654. Now it's true, the article doesn't give you a single "twice RAM" or other simple answer. But it does give you all the information you need to make an intelligent, performance enhancing, decision.
Charlie.