So I currently have a GT 120 (stock card) installed but want to have something a little better for basically casual gaming. I need to know I can get audio output through either the Display Port and/or HDMI ports since I will want to be doing said gaming on an HDTV with HDMI input My system is a Mac Pro 4,1 (5,1 firmware) running 10.13.4 #1) My main question is does audio output work through the display port or HDMI outputs of the Sapphire Radeon Pulse RX 560 4GB GPU without any further modifications? #2) If modifications are required, would I follow the instructions found in the "GUIDE: HDMI Audio" thread? (https://forums.macrumors.com/threads/guide-hdmi-audio.1499797/) #3) I am interested in still maintaining the boot screen. I know this can be done by simply swapping the GT 120 in as needed. For easy workflow though I am wondering if it makes sense for me to install the Sapphire Radeon Pulse RX 560 4GB into slot #1, and also install the GT 120 into slot #2? My end goal here would be to hook up two monitors to the RX 560 as my main working screens (will use DVI for 1st monitor and then DP or HDMI for the 2nd monitor), and then have a 3rd monitor hooked up to the GT 120 through DVI. Will the boot screen display on the monitor hooked up to the GT 120? This 3rd monitor is going to be more of a "auxiliary" work space and I will actually be leaving the monitor powered off unless I need the boot screen or want some extra space.