Had to Dremel the top of the back plate and take off a small little square in order to fit backplate on waterblock to fit in the impact motherboard pcie slot. Most gpu do not fit this stupid motherboard. The back io is to big. Leave you like the the width of paper to fit the gpu. Even the original backplate from the air cooler had a hard time with this motherboard. So please becareful if you use a impact motherboard.