Upgrading from RH 7.0+bits to fairfax, I met the
"Add swap" dialogue box in the text mode install.
It tells you that you'll need more swap, and the
"twice the RAM" formula. It tells you how much
swap you currently have.
It doesn't tell you how much RAM (it thinks) you
have. I realise that many people know this kind of
stuff, but when it's one of about half a dozen
machines or when you really don't know anything
about your computer, it's easy to get muddled.
If there is room for this, "Found: this amount of
RAM (may be wrong of course..)" gives people an
idea of whether they should be adding swap.