yea that not gonna work for me i need real info, and im not so sre about it being so much as warmer http://news.softpedia.com/news/EVGA-GTX-470-SuperClocked-Is-7-Degrees-Cooler-142740.shtml
He is right, the difference in frames is very minimal because the factory "overclocked" cards are barely even overclocked. The only real difference between the cards is the backplate... in which case you can deduct the temp difference.
2 x 460's would be ideal if the heat of the other cards would be unbearable for you.
In my mind the $30 price jump from a SuperClocked card to a reference card is most definitely not worth it considering you'd basically be paying $30 for a backplate.