These nVIDIA SLI and ATI CrossFire power supplies feature multiple PCI Express Connectors to support powerful SLI and CrossFire computer systems. nVIDIA has certified only a handful of SLI Power Supplies on the market as "nVIDIA Certified SLI Ready Power Supplies." These can be found in the nVIDIA Certified Section. And quality is never an issue as we carry products from names like Kingwin.