My bad I wasn't clear.
According to Dan's website, the A4 fits gfx card
Without backplate: 40 mm
Including backplate: 45 mm
Think of the pci-e slot as the "starting point"
So 40mm of space from the pcb to the bottom of the card (relevant b/c pci-e slot can't move),
and 5mm of space from the pcb...