Some cases have a vertical card mounting bracket mod available, but that puts you into an “either/or” position - you either mount your card vertically or horizontally. With all said and done, I’ve mounted the riser in the bottom section of the case, connected it to the bottom PCI-E slot on my motherboard, and mounted one card vertically and another one horizontally. Also, NVLink bridges are vendor-specific, so one you’d get for a EVGA card might not work for a Gigabyte card because of NVLink slot positioning.