Use 2 Intensity Pro Card At the same time

should i use 2 (or 3) Intensity Pro Card
in one PC
at the same time ?
because i want capture two DVs video in one PC at the same time.
the pc's system is win7-64bit.
thanks.
my email is lilindun@gmail.com

Im using two decklinks.. So i think two intensity wont be probkem..