Rimhill sets the maximum cd-rom speed to the specified level in your drive. This will prevent the annoying sound if a cd-rom is in your drive and also speeds up access time if the drive is rarely used since the drive must only spin up to 8x instead of 48x. RimhillEx is the updated version of Rimhill. RimhillEx doesn’t require a device driver. Therefore RimhillEx it is preferred application. Rimhill supports 32 Bit Windows 7 / Vista / XP / 2000 and NT4.