The XFX and Gigabyte use the reference PCB.
Easiest way to know is to just read a review for the particular brand card you're looking at. A competent reviewer (and one that reviewed the reference card when it first launced) will know when a card is reference vs. virtual.
Rest in peace Mike Clements aka Yellowbeard
Last edited by jonnyGURU; 09-02-2012 at 10:35 PM.