To make a long story short, I bought a h100i to replace the 115i since the radiator was too big to fit in the top of the case. Have installed the h100i radiator in the 450D case, but I'm unable to remove the installed intel bracket so I can replace it with the AMD bracket. I've watched the youtube videos of the installation of the AMD bracket and still have not been able to remove the intel bracket. According to the youtube video the intel bracket should be turned 1/8th of a turn to the left and the lifted up of the water pump. I'm unable to get the bracket to move to the left at all. Would anyone have any suggestions to help me out?