I'm guessing that if you want to use Ultramon you will be setting them up on a Windows PC? It might be a little easier in Windows. Not sure what type of monitors you have.. but make sure you read up on "active adapters" because depending on how you hook up your displays makes a difference. The R9 has 4 different outputs on it but the video processor can only handle 2 at a time using the GPU as the controller. I have 3 monitors hooked up right now. 2 are plugged in to DVI and the 3rd is hooked up through the display port using an active adapter. I wasn't able to run out to best buy and grab an active adapter so grabbed one off Amazon.