Hello, Looking at this monitor --> http://www.amazon.com/ASUS-PQ321Q-31-5-Inch-4K-Monitor/dp/B00DJ4BIKA Can the latest rMBP (with/without the dGPU) drive this one at full 4K resolution. I know that it has HDMI out at 4K but only at 30Hz, which probably does not work. Thanks EDIT: There is an answer about using displayport 1.2. However, it appears each one will only drive 2560x1440 (even though the spec goes beyond that). You can drive two monitors at 2560x1440 (apart from the laptop) but not 4K.