Yes, there is a problem with these controllers at times. Sometimes you have to uninstall the Nforce4 drivers for the controller, and sometimes you don't. When I had an Nforce3 board and I installed my Plextor 716SA drive, I had to install the Nforce4 drivers for the controller to get the drive to work properly. But the problem with that is, is that the drive doesn't work up to the speed at which it should work at.