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.

I will be using reference cards provided to us by both ATI and NVIDIA for testing. A reference clocked GeForce GTS 450 1GB video card runs about $129.99 online, so a set of these cards will cost you about $260 out the door for an SLI configuration. The ATI Radeon HD 5770 1GB video card can be found for $139.99 online, which makes $280 for a CrossFire multi-GPU setup. Both multi-GPU solutions are within $20 of each other and are clearly the enemies if there was ever such a thing for video cards

• READ MORE (Source): NVIDIA GeForce GTS 450 SLI versus ATI Radeon HD 5770 CrossFire – ATI CrossFire Versus NVIDIA SLI – Legit Reviews