Investigating Bandwidth on the SLI X16 Chipset

PC Perspective has posted a very interesting new article which investigates some of the bandwidth limitations for SLI and Crossfire chipsets. With the launch of ATI's Crossfire Xpress 3200 we reviewed here, ATI has made several allegations indicating NVIDIA's SLI technology was at a distinct architectural disadvantage. Ryan puts the marketing aside and walks away with a clear understanding of how the two architectures truly match up.

The truth of the matter is that both the NVIDIA NF4 SLI X16 chipset and the ATI XPress 3200 chipset provided enough bandwidth for today's SLI and CrossFire generations, at the least. ATI's attempt to promote their RD580 chipset by showing poor performance numbers on inter-GPU communications didn't add up in our testing.