sparetimepc
So are those cards all linked and running sli with the Nvidia driver mod and without an nvlink adapter?

No immediate plans for sli, as Cool GTX says, it's primarily a folding rig. However, if anyone were to find a workaround for 4x2080ti sli, I'd certainly look at it, because it would just be soooo awesome! But from what I've read there's nothing too promising.
Due to the thermals on air, I've just been folding on two cards while I prepare the other two with waterblocks. Maybe switch over tonight and see just how good the Heatkillers are.