I have recently gotten an overwhelming amount of e-mail from readers since I posted my launch day review on the NVIDIA GeForce GTS 450 video cards asking why I didn't compare a pair of GeForce GTS 450 video cards in SLI to a couple of ATI Radeon HD 5770 video cards running in CrossFire.  The answer to this question is simple: time constraints. I benchmarked the cards for that article and then headed to the airport for the Intel Developer Forum where I finished up writing the article and then posted it while flying somewhere over Nevada at 40,000 feet above the ground. Now that I am back from attending both IDF and GTC 2010 I am back in the trenches and have had the time to do the quick and dirty CrossFire versus SLI performance scaling article that you are reading here today.