is there a vertical mounting bracket for the 2x 3090 as all I can find are single vertical mounting brackets ? thanks
All vertical GPU mounting hardware that need to be installed into a generic case are single, not dual. If you want to have 2x 3090's in the vertical position, you're going to need a case that supports vertical GPU's that are closer to the side panel and a bracket that goes on the PCIe slots or a custom made bracket, though if you're watercooling the cards, then the custom made bracket makes sense. If you're aircooling, you're just trying to cook the GPU's in their own shrouds.