Unlike the RTX 3080 and RTX 3070, the RTX 3090 does have an NVLink connector and it is SLI ready. Being a TITAN RTX replacement or at least offers a TITAN class performance, it's only natural for it to have the ability to be used side by side with another RTX 3090. After all, this isn't simply a gaming graphics card; it's also aimed towards developers, creators, researches who require a lot of GPU power, and a lot of GPU memory.