There would be two restrictions on card height. The first is the top left side rail of the case. Tall very wide cards may hit this. The second is the cutout in the front of the case that allows longer cards to poke through into the front panel area, this cutout is limited height and may cause problems. Also an issue is the position of the PCIe power connectors. Sometimes the card will physically fit but the power connectors are impossible to get on.I can also find people saying that you can fit longer cards but they "can't be too tall" but nobody gives an example of the max height of the card.