Hey popatim, thanks for replying. I'm gonna be using the new rtx cards and I know an NVLink data transfer is way faster than an sli bridge. I just wasn't sure what NVLink I needed to make it work. But I think I figured it out. If I plan on using the top two PCI slots I'm gonna need a 3 slot, and if I was to use the top and bottom slot which makes no sense...lol, I'd need a 4 slot nvlink.